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  1. Article ; Online: Search for the Lepton Flavor Violating Decays B^{+}→K^{+}τ^{±}ℓ^{∓} (ℓ=e, μ) at Belle.

    Watanuki, S / de Marino, G / Trabelsi, K / Adachi, I / Aihara, H / Asner, D M / Atmacan, H / Aulchenko, V / Aushev, T / Ayad, R / Babu, V / Banerjee, Sw / Bauer, M / Behera, P / Belous, K / Bessner, M / Bhardwaj, V / Bhuyan, B / Biswas, D /
    Bodrov, D / Bonvicini, G / Borah, J / Bozek, A / Bračko, M / Branchini, P / Browder, T E / Budano, A / Campajola, M / Cao, L / Červenkov, D / Chang, M-C / Cheon, B G / Chilikin, K / Cho, K / Cho, S-J / Choi, S-K / Choi, Y / Choudhury, S / Cinabro, D / Das, S / De Nardo, G / De Pietro, G / Dhamija, R / Di Capua, F / Dong, T V / Epifanov, D / Ferber, T / Ferlewicz, D / Fulsom, B G / Garg, R / Gaur, V / Garmash, A / Giri, A / Goldenzweig, P / Graziani, E / Gu, T / Guan, Y / Gudkova, K / Hadjivasiliou, C / Halder, S / Han, X / Hara, T / Hayasaka, K / Hayashii, H / Herrmann, D / Hou, W-S / Hsu, C-L / Inami, K / Inguglia, G / Ipsita, N / Ishikawa, A / Itoh, R / Iwasaki, M / Jacobs, W W / Ji, Q P / Jia, S / Jin, Y / Joo, K K / Kaliyar, A B / Kichimi, H / Kim, C H / Kim, D Y / Kim, K-H / Kim, Y-K / Kinoshita, K / Kodyš, P / Korobov, A / Korpar, S / Kovalenko, E / Križan, P / Krokovny, P / Kuhr, T / Kumar, M / Kumara, K / Kuzmin, A / Kwon, Y-J / Lange, J S / Laurenza, M / Lee, S C / Lewis, P / Li, L K / Li, Y / Li Gioi, L / Libby, J / Lin, Y-R / Liventsev, D / Matsuda, T / Maurya, S K / Meier, F / Merola, M / Metzner, F / Miyabayashi, K / Mizuk, R / Mohanty, G B / Nakao, M / Nayak, L / Nayak, M / Nisar, N K / Nishida, S / Ono, H / Oskin, P / Pakhlova, G / Pardi, S / Park, H / Park, J / Park, S-H / Passeri, A / Pedlar, T K / Pestotnik, R / Piilonen, L E / Podobnik, T / Prencipe, E / Prim, M T / Röhrken, M / Rout, N / Russo, G / Sandilya, S / Sangal, A / Santelj, L / Savinov, V / Schnell, G / Schwanda, C / Seino, Y / Senyo, K / Sevior, M E / Shan, W / Shapkin, M / Shiu, J-G / Shwartz, B / Simon, F / Solovieva, E / Starič, M / Sumihama, M / Sumiyoshi, T / Takizawa, M / Tanida, K / Tenchini, F / Uchida, M / Uglov, T / Unno, Y / Uno, K / Uno, S / van Tonder, R / Varner, G / Varvell, K E / Wang, D / Wang, E / Wang, M-Z / Won, E / Xu, X / Yabsley, B D / Yan, W / Yang, S B / Yelton, J / Yusa, Y / Zhang, Z P / Zhilich, V / Zhukova, V

    Physical review letters

    2023  Volume 130, Issue 26, Page(s) 261802

    Abstract: We present a search for the lepton flavor violating decays B^{+}→K^{+}τ^{±}ℓ^{∓}, with ℓ=(e,μ), using the full data sample of 772×10^{6}  BB[over ¯] pairs recorded by the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. We use events in ... ...

    Abstract We present a search for the lepton flavor violating decays B^{+}→K^{+}τ^{±}ℓ^{∓}, with ℓ=(e,μ), using the full data sample of 772×10^{6}  BB[over ¯] pairs recorded by the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode. We find no evidence for B^{±}→K^{±}τℓ decays and set upper limits on their branching fractions at the 90% confidence level in the (1-3)×10^{-5} range. The obtained limits are the world's best results.
    Language English
    Publishing date 2023-01-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.130.261802
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Evidence of a New Excited Charmed Baryon Decaying to Σ_{c}(2455)^{0,++}π^{±}.

    Li, Y B / Shen, C P / Adachi, I / Aihara, H / Asner, D M / Atmacan, H / Aushev, T / Ayad, R / Babu, V / Bahinipati, S / Behera, P / Belous, K / Bennett, J / Bessner, M / Bhardwaj, V / Bhuyan, B / Bilka, T / Bodrov, D / Borah, J /
    Bozek, A / Bračko, M / Branchini, P / Browder, T E / Budano, A / Campajola, M / Červenkov, D / Chang, M-C / Chang, P / Cheon, B G / Chilikin, K / Cho, H E / Cho, K / Cho, S-J / Choi, S-K / Choi, Y / Choudhury, S / Cinabro, D / Das, S / De Pietro, G / Dhamija, R / Di Capua, F / Dingfelder, J / Doležal, Z / Dong, T V / Dossett, D / Epifanov, D / Fulsom, B G / Garg, R / Gaur, V / Garmash, A / Giri, A / Goldenzweig, P / Graziani, E / Gu, T / Guan, Y / Gudkova, K / Hadjivasiliou, C / Hayasaka, K / Hayashii, H / Hou, W-S / Hsu, C-L / Iijima, T / Inami, K / Ipsita, N / Ishikawa, A / Itoh, R / Iwasaki, M / Iwasaki, Y / Jacobs, W W / Jang, E-J / Ji, Q P / Jia, S / Jin, Y / Joo, K K / Karyan, G / Kawasaki, T / Kichimi, H / Kiesling, C / Kim, C H / Kim, D Y / Kim, K-H / Kim, Y-K / Kindo, H / Kinoshita, K / Kodyš, P / Konno, T / Korobov, A / Korpar, S / Kovalenko, E / Križan, P / Krokovny, P / Kumar, M / Kumar, R / Kumara, K / Kwon, Y-J / Lam, T / Lange, J S / Laurenza, M / Lee, S C / Li, C H / Li, J / Li, L K / Li, Y / Li Gioi, L / Libby, J / Lieret, K / Liventsev, D / Masuda, M / Matsuda, T / Matvienko, D / Maurya, S K / Meier, F / Merola, M / Metzner, F / Miyabayashi, K / Mizuk, R / Mohanty, G B / Nakamura, I / Nakao, M / Natkaniec, Z / Natochii, A / Nayak, L / Niiyama, M / Nisar, N K / Nishida, S / Ogawa, S / Ono, H / Oskin, P / Pakhlov, P / Pakhlova, G / Pardi, S / Park, H / Park, S-H / Patra, S / Paul, S / Pedlar, T K / Pestotnik, R / Piilonen, L E / Podobnik, T / Prencipe, E / Prim, M T / Rout, N / Russo, G / Sandilya, S / Santelj, L / Savinov, V / Schnell, G / Schueler, J / Schwanda, C / Seino, Y / Senyo, K / Sevior, M E / Shapkin, M / Sharma, C / Shiu, J-G / Singh, J B / Sokolov, A / Solovieva, E / Starič, M / Stottler, Z S / Sumihama, M / Sumiyoshi, T / Sutcliffe, W / Takizawa, M / Tamponi, U / Tanida, K / Tenchini, F / Trabelsi, K / Tsuboyama, T / Uchida, M / Uglov, T / Unno, Y / Uno, S / Usov, Y / van Tonder, R / Varner, G / Varvell, K E / Waheed, E / Wang, E / Wang, M-Z / Watanabe, M / Watanuki, S / Werbycka, O / Wiechczynski, J / Won, E / Yabsley, B D / Yan, W / Yang, S B / Yelton, J / Yin, J H / Yuan, C Z / Yusa, Y / Zhai, Y / Zhang, Z P / Zhilich, V / Zhukova, V

    Physical review letters

    2023  Volume 130, Issue 3, Page(s) 31901

    Abstract: We present the study of B[over ¯]^{0}→Σ_{c}(2455)^{0,++}π^{±}p[over ¯] decays based on 772×10^{6}  BB[over ¯] events collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. The Σ_{c}(2455)^{0,++} candidates are reconstructed ... ...

    Abstract We present the study of B[over ¯]^{0}→Σ_{c}(2455)^{0,++}π^{±}p[over ¯] decays based on 772×10^{6}  BB[over ¯] events collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. The Σ_{c}(2455)^{0,++} candidates are reconstructed via their decay to Λ_{c}^{+}π^{∓} and Λ_{c}^{+} decays to pK^{-}π^{+}, pK_{S}^{0}, and Λπ^{+} final states. The corresponding branching fractions are measured to be B(B[over ¯]^{0}→Σ_{c}(2455)^{0}π^{+}p[over ¯])=(1.09±0.06±0.07)×10^{-4} and B(B[over ¯]^{0}→Σ_{c}(2455)^{++}π^{-}p[over ¯])=(1.84±0.11±0.12)×10^{-4}, which are consistent with the world average values with improved precision. A new structure is found in the M_{Σ_{c}(2455)^{0,++}π^{±}} spectrum with a significance of 4.2σ including systematic uncertainty. The structure is possibly an excited Λ_{c}^{+} and is tentatively named Λ_{c}(2910)^{+}. Its mass and width are measured to be (2913.8±5.6±3.8)  MeV/c^{2} and (51.8±20.0±18.8)  MeV, respectively. The products of branching fractions for the Λ_{c}(2910)^{+} are measured to be B(B[over ¯]^{0}→Λ_{c}(2910)^{+}p[over ¯])×B(Λ_{c}(2910)^{+}→Σ_{c}(2455)^{0}π^{+})=(9.5±3.6±1.6)×10^{-6} and B(B[over ¯]^{0}→Λ_{c}(2910)^{+}p[over ¯])×B(Λ_{c}(2910)^{+}→Σ_{c}(2455)^{++}π^{-})=(1.24±0.35±0.10)×10^{-5}. Here, the first and second uncertainties are statistical and systematic, respectively.
    Language English
    Publishing date 2023-02-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.130.031901
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: First Measurement of the Michel Parameter ξ^{'} in the τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} Decay at Belle.

    Bodrov, D / Pakhlov, P / Adachi, I / Aihara, H / Said, S Al / Asner, D M / Atmacan, H / Aushev, T / Ayad, R / Babu, V / Banerjee, Sw / Behera, P / Belous, K / Bennett, J / Bessner, M / Bhuyan, B / Bilka, T / Biswas, D / Bobrov, A /
    Bondar, A / Borah, J / Bozek, A / Bračko, M / Branchini, P / Browder, T E / Budano, A / Campajola, M / Červenkov, D / Chang, M-C / Cheon, B G / Chilikin, K / Cho, H E / Cho, K / Cho, S-J / Choi, S-K / Choi, Y / Choudhury, S / Cinabro, D / Das, S / De Nardo, G / De Pietro, G / Dhamija, R / Di Capua, F / Dingfelder, J / Doležal, Z / Dong, T V / Epifanov, D / Ferber, T / Ferlewicz, D / Fulsom, B G / Gaur, V / Garmash, A / Giri, A / Goldenzweig, P / Graziani, E / Greenwald, D / Gu, T / Guan, Y / Gudkova, K / Hadjivasiliou, C / Halder, S / Hayasaka, K / Hayashii, H / Hedges, M T / Herrmann, D / Hou, W-S / Hsu, C-L / Iijima, T / Inami, K / Ipsita, N / Ishikawa, A / Itoh, R / Iwasaki, M / Jacobs, W W / Jang, E-J / Ji, Q P / Jia, S / Jin, Y / Joo, K K / Kalita, D / Kaliyar, A B / Kawasaki, T / Kiesling, C / Kim, C H / Kim, D Y / Kim, K-H / Kim, Y-K / Kindo, H / Kinoshita, K / Kodyš, P / Korpar, S / Križan, P / Krokovny, P / Kuhr, T / Kumar, M / Kumar, R / Kumara, K / Kwon, Y-J / Lange, J S / Lee, S C / Li, J / Li, L K / Libby, J / Lieret, K / Lin, Y-R / Liventsev, D / Luo, T / Ma, Y / Masuda, M / Matsuda, T / Maurya, S K / Meier, F / Merola, M / Metzner, F / Miyabayashi, K / Mizuk, R / Mohanty, G B / Mussa, R / Nakao, M / Narwal, D / Natkaniec, Z / Natochii, A / Nayak, L / Nayak, M / Nisar, N K / Nishida, S / Ogawa, S / Oskin, P / Pakhlova, G / Pardi, S / Park, H / Park, J / Park, S-H / Passeri, A / Patra, S / Paul, S / Pestotnik, R / Piilonen, L E / Podobnik, T / Prencipe, E / Prim, M T / Rabusov, A / Rout, N / Russo, G / Sandilya, S / Sangal, A / Santelj, L / Savinov, V / Schnell, G / Schwanda, C / Seino, Y / Senyo, K / Shan, W / Shapkin, M / Sharma, C / Shiu, J-G / Singh, J B / Sokolov, A / Solovieva, E / Starič, M / Stottler, Z S / Sumihama, M / Takizawa, M / Tamponi, U / Tanida, K / Tenchini, F / Tiwary, R / Trabelsi, K / Uchida, M / Uglov, T / Unno, Y / Uno, K / Uno, S / Vahsen, S E / Varner, G / Vinokurova, A / Vossen, A / Wang, D / Wang, E / Wang, M-Z / Watanuki, S / Werbycka, O / Xu, X / Yabsley, B D / Yan, W / Yang, S B / Yelton, J / Yin, J H / Yuan, C Z / Yusa, Y / Zhang, Z P / Zhilich, V / Zhukova, V

    Physical review letters

    2023  Volume 131, Issue 2, Page(s) 21801

    Abstract: We report the first measurement of the Michel parameter ξ^{'} in the τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} decay with a new method proposed just recently. The measurement is based on the reconstruction of the τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} events with subsequent ... ...

    Abstract We report the first measurement of the Michel parameter ξ^{'} in the τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} decay with a new method proposed just recently. The measurement is based on the reconstruction of the τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} events with subsequent muon decay in flight in the Belle central drift chamber. The analyzed data sample of 988  fb^{-1} collected by the Belle detector corresponds to approximately 912×10^{6} τ^{+}τ^{-} pairs. We measure ξ^{'}=0.22±0.94(stat)±0.42(syst), which is in agreement with the standard model prediction of ξ^{'}=1. Statistical uncertainty dominates in this study, being a limiting factor, while systematic uncertainty is well under control. Our analysis proved the practicability of this promising method and its prospects for further precise measurement in future experiments.
    Language English
    Publishing date 2023-07-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.021801
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

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  4. Article ; Online: Search for Lepton-Flavor-Violating τ Decays to a Lepton and an Invisible Boson at Belle II.

    Adachi, I / Adamczyk, K / Aggarwal, L / Ahmed, H / Aihara, H / Akopov, N / Aloisio, A / Anh Ky, N / Asner, D M / Aushev, T / Aushev, V / Bae, H / Bahinipati, S / Bambade, P / Banerjee, Sw / Baudot, J / Bauer, M / Baur, A / Beaubien, A /
    Becker, J / Behera, P K / Bennett, J V / Bernieri, E / Bernlochner, F U / Bertacchi, V / Bertemes, M / Bertholet, E / Bessner, M / Bettarini, S / Bhuyan, B / Bianchi, F / Bilka, T / Bilokin, S / Biswas, D / Bodrov, D / Bolz, A / Borah, J / Bozek, A / Bračko, M / Branchini, P / Browder, T E / Budano, A / Bussino, S / Campajola, M / Cao, L / Casarosa, G / Cecchi, C / Chang, M-C / Chang, P / Cheaib, R / Cheema, P / Chekelian, V / Chen, Y Q / Cheon, B G / Chilikin, K / Chirapatpimol, K / Cho, H-E / Cho, K / Cho, S-J / Choi, S-K / Choudhury, S / Cinabro, D / Corona, L / Cunliffe, S / Das, S / Dattola, F / De La Cruz-Burelo, E / De La Motte, S A / De Nardo, G / De Nuccio, M / De Pietro, G / de Sangro, R / Destefanis, M / Dey, S / De Yta-Hernandez, A / Dhamija, R / Di Canto, A / Di Capua, F / Dingfelder, J / Doležal, Z / Domínguez Jiménez, I / Dong, T V / Dorigo, M / Dort, K / Dossett, D / Dreyer, S / Dubey, S / Dujany, G / Ecker, P / Eliachevitch, M / Epifanov, D / Feichtinger, P / Ferber, T / Ferlewicz, D / Fillinger, T / Finck, C / Finocchiaro, G / Flood, K / Fodor, A / Forti, F / Fulsom, B G / Gabrielli, A / Ganiev, E / Garcia-Hernandez, M / Gaur, V / Gaz, A / Gellrich, A / Ghevondyan, G / Giordano, R / Giri, A / Glazov, A / Gobbo, B / Godang, R / Goldenzweig, P / Gradl, W / Granderath, S / Graziani, E / Greenwald, D / Gruberová, Z / Gu, T / Gudkova, K / Guilliams, J / Hara, T / Hayasaka, K / Hayashii, H / Hazra, S / Hearty, C / Heredia de la Cruz, I / Hernández Villanueva, M / Hershenhorn, A / Higuchi, T / Hill, E C / Hohmann, M / Hsu, C-L / Humair, T / Iijima, T / Inami, K / Inguglia, G / Ipsita, N / Ishikawa, A / Ito, S / Itoh, R / Iwasaki, M / Jackson, P / Jacobs, W W / Jaffe, D E / Jang, E-J / Ji, Q P / Jia, S / Jin, Y / Joo, K K / Junkerkalefeld, H / Kakuno, H / Kaliyar, A B / Kandra, J / Kang, K H / Kang, S / Karl, R / Karyan, G / Kiesling, C / Kim, C-H / Kim, D Y / Kim, K-H / Kim, Y-K / Kindo, H / Kinoshita, K / Kodyš, P / Koga, T / Kohani, S / Kojima, K / Konno, T / Korobov, A / Korpar, S / Kovalenko, E / Kowalewski, R / Kraetzschmar, T M G / Križan, P / Krokovny, P / Kuhr, T / Kumar, J / Kumar, R / Kumara, K / Kunigo, T / Kuzmin, A / Kwon, Y-J / Lacaprara, S / Lam, T / Lanceri, L / Lange, J S / Laurenza, M / Lautenbach, K / Leboucher, R / Le Diberder, F R / Leitl, P / Lewis, P M / Li, C / Li, L K / Li, Y B / Libby, J / Lieret, K / Liptak, Z / Liu, Q Y / Liventsev, D / Longo, S / Lozar, A / Lueck, T / Luo, T / Lyu, C / Maggiora, M / Maiti, R / Maity, S / Manfredi, R / Manoni, E / Manthei, A / Marcello, S / Marinas, C / Martel, L / Martini, A / Martinov, T / Massaccesi, L / Masuda, M / Matsuda, T / Matsuoka, K / Matvienko, D / Maurya, S K / McKenna, J A / Meier, F / Merola, M / Metzner, F / Milesi, M / Miller, C / Miyabayashi, K / Mizuk, R / Mohanty, G B / Molina-Gonzalez, N / Moneta, S / Moser, H-G / Mrvar, M / Mussa, R / Nakamura, I / Nakamura, K R / Nakao, M / Nakayama, H / Nakazawa, Y / Narimani Charan, A / Naruki, M / Natochii, A / Nayak, L / Nayak, M / Nazaryan, G / Niebuhr, C / Nisar, N K / Nishida, S / Ogawa, S / Ono, H / Onuki, Y / Oskin, P / Pakhlov, P / Pakhlova, G / Paladino, A / Panta, A / Paoloni, E / Pardi, S / Parham, K / Park, H / Park, S-H / Paschen, B / Passeri, A / Patra, S / Paul, S / Pedlar, T K / Peruzzi, I / Peschke, R / Pestotnik, R / Pham, F / Piccolo, M / Piilonen, L E / Pinna Angioni, G / Podesta-Lerma, P L M / Podobnik, T / Pokharel, S / Polat, L / Praz, C / Prell, S / Prencipe, E / Prim, M T / Purwar, H / Rad, N / Rados, P / Raeuber, G / Raiz, S / Ramirez Morales, A / Reif, M / Reiter, S / Remnev, M / Ripp-Baudot, I / Rizzo, G / Robertson, S H / Rodríguez Pérez, D / Roney, J M / Rostomyan, A / Rout, N / Russo, G / Sanders, D A / Sandilya, S / Sangal, A / Santelj, L / Sato, Y / Savinov, V / Scavino, B / Schueler, J / Schwanda, C / Seino, Y / Selce, A / Senyo, K / Serrano, J / Sevior, M E / Sfienti, C / Shen, C P / Shi, X D / Shillington, T / Shiu, J-G / Shwartz, B / Sibidanov, A / Simon, F / Singh, J B / Skorupa, J / Sobie, R J / Soffer, A / Sokolov, A / Solovieva, E / Spataro, S / Spruck, B / Starič, M / Stefkova, S / Stottler, Z S / Stroili, R / Strube, J / Sue, Y / Sumihama, M / Sumisawa, K / Sutcliffe, W / Suzuki, S Y / Svidras, H / Takizawa, M / Tamponi, U / Tanida, K / Tanigawa, H / Tenchini, F / Thaller, A / Tiwary, R / Tonelli, D / Torassa, E / Toutounji, N / Trabelsi, K / Uchida, M / Ueda, I / Uematsu, Y / Uglov, T / Unger, K / Unno, Y / Uno, K / Uno, S / Ushiroda, Y / Vahsen, S E / van Tonder, R / Varner, G S / Varvell, K E / Vinokurova, A / Vitale, L / Vobbilisetti, V / Wakeling, H M / Wang, E / Wang, M-Z / Wang, X L / Warburton, A / Watanabe, M / Watanuki, S / Welsch, M / Wessel, C / Wiechczynski, J / Xu, X P / Yabsley, B D / Yamada, S / Yan, W / Yang, S B / Ye, H / Yelton, J / Yin, J H / Yook, Y M / Yoshihara, K / Yuan, C Z / Yusa, Y / Zani, L / Zhang, Y / Zhilich, V / Zhou, Q D / Zhou, X Y / Zhukova, V I / Žlebčík, R

    Physical review letters

    2023  Volume 130, Issue 18, Page(s) 181803

    Abstract: We search for lepton-flavor-violating τ^{-}→e^{-}α and τ^{-}→μ^{-}α decays, where α is an invisible spin-0 boson. The search uses electron-positron collisions at 10.58 GeV center-of-mass energy with an integrated luminosity of 62.8  fb^{-1}, produced by ... ...

    Abstract We search for lepton-flavor-violating τ^{-}→e^{-}α and τ^{-}→μ^{-}α decays, where α is an invisible spin-0 boson. The search uses electron-positron collisions at 10.58 GeV center-of-mass energy with an integrated luminosity of 62.8  fb^{-1}, produced by the SuperKEKB collider and collected with the Belle II detector. We search for an excess in the lepton-energy spectrum of the known τ^{-}→e^{-}ν[over ¯]_{e}ν_{τ} and τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} decays. We report 95% confidence-level upper limits on the branching-fraction ratio B(τ^{-}→e^{-}α)/B(τ^{-}→e^{-}ν[over ¯]_{e}ν_{τ}) in the range (1.1-9.7)×10^{-3} and on B(τ^{-}→μ^{-}α)/B(τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ}) in the range (0.7-12.2)×10^{-3} for α masses between 0 and 1.6  GeV/c^{2}. These results provide the most stringent bounds on invisible boson production from τ decays.
    Language English
    Publishing date 2023-03-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.130.181803
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Test of Light-Lepton Universality in the Rates of Inclusive Semileptonic B-Meson Decays at Belle II.

    Aggarwal, L / Ahmed, H / Aihara, H / Akopov, N / Aloisio, A / Anh Ky, N / Asner, D M / Atmacan, H / Aushev, T / Aushev, V / Bae, H / Bahinipati, S / Bambade, P / Banerjee, Sw / Bansal, S / Barrett, M / Baudot, J / Bauer, M / Baur, A /
    Beaubien, A / Becker, J / Bennett, J V / Bernieri, E / Bernlochner, F U / Bertacchi, V / Bertemes, M / Bertholet, E / Bessner, M / Bettarini, S / Bhardwaj, V / Bhuyan, B / Bianchi, F / Bilka, T / Bilokin, S / Biswas, D / Bodrov, D / Borah, J / Bozek, A / Bračko, M / Briere, R A / Browder, T E / Budano, A / Bussino, S / Campajola, M / Cao, L / Casarosa, G / Cecchi, C / Cerasoli, J / Chang, M-C / Cheaib, R / Cheema, P / Chekelian, V / Cheon, B G / Chilikin, K / Chirapatpimol, K / Cho, H-E / Cho, K / Cho, S-J / Choi, S-K / Choudhury, S / Cochran, J / Corona, L / Cunliffe, S / Dattola, F / De La Cruz-Burelo, E / De La Motte, S A / De Nardo, G / De Nuccio, M / De Pietro, G / de Sangro, R / Destefanis, M / Dhamija, R / Di Capua, F / Dingfelder, J / Doležal, Z / Dong, T V / Dorigo, M / Dossett, D / Dreyer, S / Dubey, S / Dujany, G / Ecker, P / Eliachevitch, M / Feichtinger, P / Ferber, T / Ferlewicz, D / Fillinger, T / Finocchiaro, G / Fodor, A / Forti, F / Frey, A / Fulsom, B G / Gabrielli, A / Ganiev, E / Garcia-Hernandez, M / Gaudino, G / Gaur, V / Gaz, A / Gellrich, A / Ghevondyan, G / Giordano, R / Giri, A / Glazov, A / Gobbo, B / Godang, R / Goldenzweig, P / Gradl, W / Grammatico, T / Granderath, S / Graziani, E / Gruberová, Z / Gu, T / Gudkova, K / Halder, S / Hara, T / Hayasaka, K / Hayashii, H / Hazra, S / Hearty, C / Hedges, M T / Heredia de la Cruz, I / Hernández Villanueva, M / Hershenhorn, A / Higuchi, T / Hill, E C / Hohmann, M / Hsu, C-L / Iijima, T / Inami, K / Inguglia, G / Ipsita, N / Ishikawa, A / Ito, S / Itoh, R / Iwasaki, M / Jacobs, W W / Jang, E-J / Ji, Q P / Jia, S / Jin, Y / Junkerkalefeld, H / Kaleta, M / Kaliyar, A B / Karyan, G / Kawasaki, T / Kiesling, C / Kim, C-H / Kim, D Y / Kim, K-H / Kim, Y-K / Kindo, H / Kinoshita, K / Kodyš, P / Kohani, S / Kojima, K / Korobov, A / Korpar, S / Kovalenko, E / Kowalewski, R / Križan, P / Krokovny, P / Kumar, J / Kumar, R / Kumara, K / Kuzmin, A / Kwon, Y-J / Lacaprara, S / Lange, J S / Laurenza, M / Leboucher, R / Le Diberder, F R / Levit, D / Lewis, P M / Li, L K / Libby, J / Liptak, Z / Liu, Q Y / Liu, Z Q / Liventsev, D / Longo, S / Lueck, T / Lyu, C / Ma, Y / Maggiora, M / Maharana, S P / Maiti, R / Maity, S / Manfredi, R / Manoni, E / Manthei, A C / Mantovano, M / Marinas, C / Martel, L / Martellini, C / Martini, A / Massaccesi, L / Masuda, M / Matsuoka, K / Matvienko, D / Maurya, S K / McKenna, J A / Meier, F / Merola, M / Metzner, F / Milesi, M / Miller, C / Miyabayashi, K / Mizuk, R / Mohanty, G B / Moneta, S / Mrvar, M / Mussa, R / Nakamura, I / Nakamura, K R / Nakao, M / Nakazawa, Y / Narimani Charan, A / Naruki, M / Narwal, D / Natochii, A / Nayak, L / Nazaryan, G / Nisar, N K / Nishida, S / Ono, H / Onuki, Y / Oskin, P / Pakhlov, P / Pakhlova, G / Paladino, A / Panta, A / Pardi, S / Park, H / Park, J / Paschen, B / Passeri, A / Patra, S / Paul, S / Pedlar, T K / Peruzzi, I / Peschke, R / Pestotnik, R / Piilonen, L E / Pinna Angioni, G / Podesta-Lerma, P L M / Podobnik, T / Pokharel, S / Polat, L / Praz, C / Prell, S / Prencipe, E / Prim, M T / Purwar, H / Rad, N / Rados, P / Raeuber, G / Reif, M / Reiter, S / Ripp-Baudot, I / Rizzo, G / Rizzuto, L B / Rocchetti, P / Roney, J M / Rostomyan, A / Rout, N / Sanders, D A / Sandilya, S / Sangal, A / Santelj, L / Sato, Y / Scavino, B / Schwanda, C / Seino, Y / Selce, A / Senyo, K / Sevior, M E / Sfienti, C / Shan, W / Sharma, C / Shen, C P / Shillington, T / Shiu, J-G / Simon, F / Singh, J B / Skorupa, J / Sobie, R J / Soffer, A / Sokolov, A / Solovieva, E / Spataro, S / Spruck, B / Starič, M / Stefkova, S / Stroili, R / Sue, Y / Sumihama, M / Sutcliffe, W / Suzuki, S Y / Svidras, H / Takizawa, M / Tamponi, U / Tanida, K / Taniguchi, N / Tenchini, F / Tiwary, R / Tonelli, D / Torassa, E / Trabelsi, K / Tsaklidis, I / Ueda, I / Uematsu, Y / Uglov, T / Unger, K / Unno, Y / Uno, K / Uno, S / Urquijo, P / Ushiroda, Y / Vahsen, S E / van Tonder, R / Varner, G S / Varvell, K E / Vinokurova, A / Vismaya, V S / Vitale, L / Vossen, A / Wallner, S / Wang, E / Wang, M-Z / Wang, X L / Warburton, A / Watanabe, M / Watanuki, S / Welsch, M / Wessel, C / Won, E / Xu, X P / Yabsley, B D / Yamada, S / Yan, W / Yang, S B / Ye, H / Yin, J H / Yook, Y M / Yoshihara, K / Zhai, Y / Zhang, Y / Zhilich, V / Zhou, Q D / Zhou, X Y / Zhukova, V I / Žlebčík, R

    Physical review letters

    2023  Volume 131, Issue 5, Page(s) 51804

    Abstract: We present the first measurement of the ratio of branching fractions of inclusive semileptonic B-meson decays, R(X_{e/μ})=B(B→Xeν)/B(B→Xμν), a precision test of electron-muon universality, using data corresponding to 189  fb^{-1} from electron-positron ... ...

    Abstract We present the first measurement of the ratio of branching fractions of inclusive semileptonic B-meson decays, R(X_{e/μ})=B(B→Xeν)/B(B→Xμν), a precision test of electron-muon universality, using data corresponding to 189  fb^{-1} from electron-positron collisions collected with the Belle II detector. In events where the partner B meson is fully reconstructed, we use fits to the lepton momentum spectra above 1.3  GeV/c to obtain R(X_{e/μ})=1.007±0.009(stat)±0.019(syst), which is the most precise lepton-universality test of its kind and agrees with the standard-model expectation.
    Language English
    Publishing date 2023-08-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.051804
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Observation of e^{+}e^{-}→ωχ_{bJ}(1P) and Search for X_{b}→ωϒ(1S) at sqrt[s] near 10.75 GeV.

    Adachi, I / Aggarwal, L / Ahmed, H / Aihara, H / Akopov, N / Aloisio, A / Anh Ky, N / Asner, D M / Aushev, T / Aushev, V / Bae, H / Bambade, P / Banerjee, Sw / Baudot, J / Bauer, M / Beaubien, A / Becker, J / Behera, P K / Bennett, J V /
    Bernieri, E / Bernlochner, F U / Bertacchi, V / Bertemes, M / Bertholet, E / Bessner, M / Bettarini, S / Bhuyan, B / Bianchi, F / Bilka, T / Biswas, D / Bodrov, D / Bolz, A / Borah, J / Bozek, A / Bračko, M / Branchini, P / Browder, T E / Budano, A / Bussino, S / Campajola, M / Cao, L / Casarosa, G / Chang, M-C / Cheema, P / Chekelian, V / Chen, Y Q / Chilikin, K / Chirapatpimol, K / Cho, H-E / Cho, K / Cho, S-J / Choi, S-K / Choudhury, S / Cinabro, D / Corona, L / Cunliffe, S / Das, S / Dattola, F / De La Cruz-Burelo, E / De La Motte, S A / De Nardo, G / De Nuccio, M / De Pietro, G / de Sangro, R / Destefanis, M / Dey, S / De Yta-Hernandez, A / Dhamija, R / Di Canto, A / Di Capua, F / Doležal, Z / Domínguez Jiménez, I / Dong, T V / Dorigo, M / Dort, K / Dreyer, S / Dubey, S / Dujany, G / Eliachevitch, M / Feichtinger, P / Ferber, T / Ferlewicz, D / Fillinger, T / Finocchiaro, G / Fodor, A / Forti, F / Fulsom, B G / Ganiev, E / Gaur, V / Gaz, A / Gellrich, A / Ghevondyan, G / Giordano, R / Giri, A / Glazov, A / Gobbo, B / Godang, R / Goldenzweig, P / Granderath, S / Graziani, E / Greenwald, D / Gu, T / Guan, Y / Gudkova, K / Guilliams, J / Hara, T / Hayasaka, K / Hayashii, H / Hazra, S / Hearty, C / Heredia de la Cruz, I / Hernández Villanueva, M / Hershenhorn, A / Higuchi, T / Hill, E C / Hirata, H / Hohmann, M / Hsu, C-L / Iijima, T / Inami, K / Inguglia, G / Ipsita, N / Ishikawa, A / Ito, S / Iwasaki, M / Jackson, P / Jacobs, W W / Jaffe, D E / Jang, E-J / Ji, Q P / Jia, S / Jin, Y / Joo, K K / Junkerkalefeld, H / Kaliyar, A B / Kang, K H / Karl, R / Karyan, G / Ketter, C / Kiesling, C / Kim, C-H / Kim, D Y / Kim, K-H / Kim, Y-K / Kindo, H / Kodyš, P / Koga, T / Kohani, S / Kojima, K / Konno, T / Korobov, A / Korpar, S / Kovalenko, E / Kowalewski, R / Kraetzschmar, T M G / Križan, P / Krokovny, P / Kumar, R / Kumara, K / Kunigo, T / Kuzmin, A / Kwon, Y-J / Lacaprara, S / Lam, T / Lanceri, L / Lange, J S / Laurenza, M / Lautenbach, K / Leboucher, R / Lewis, P M / Li, C / Li, L K / Libby, J / Lieret, K / Liptak, Z / Liu, Q Y / Liventsev, D / Longo, S / Lozar, A / Lueck, T / Lyu, C / Maggiora, M / Maiti, R / Manfredi, R / Manoni, E / Marcello, S / Marinas, C / Martel, L / Martini, A / Martinov, T / Massaccesi, L / Masuda, M / Matsuoka, K / Maurya, S K / McKenna, J A / Merola, M / Metzner, F / Milesi, M / Miller, C / Miyabayashi, K / Mizuk, R / Molina-Gonzalez, N / Moneta, S / Moser, H-G / Mrvar, M / Mussa, R / Nakamura, I / Nakao, M / Nakazawa, Y / Narimani Charan, A / Naruki, M / Natkaniec, Z / Natochii, A / Nayak, L / Nayak, M / Nazaryan, G / Nisar, N K / Ogawa, S / Ono, H / Onuki, Y / Oskin, P / Paladino, A / Panta, A / Paoloni, E / Pardi, S / Park, H / Park, S-H / Paschen, B / Passeri, A / Paul, S / Pedlar, T K / Peruzzi, I / Peschke, R / Pestotnik, R / Piccolo, M / Piilonen, L E / Podesta-Lerma, P L M / Podobnik, T / Pokharel, S / Polat, L / Praz, C / Prell, S / Prencipe, E / Prim, M T / Purwar, H / Rad, N / Raiz, S / Ramirez Morales, A / Reif, M / Reiter, S / Remnev, M / Ripp-Baudot, I / Rizzo, G / Robertson, S H / Roney, J M / Rostomyan, A / Rout, N / Russo, G / Sanders, D A / Sandilya, S / Sangal, A / Santelj, L / Sato, Y / Savinov, V / Scavino, B / Schueler, J / Schwanda, C / Seino, Y / Selce, A / Senyo, K / Serrano, J / Sevior, M E / Sfienti, C / Shen, C P / Shi, X D / Shillington, T / Sibidanov, A / Singh, J B / Skorupa, J / Sobie, R J / Soffer, A / Solovieva, E / Spataro, S / Starič, M / Stefkova, S / Stottler, Z S / Stroili, R / Sue, Y / Sumihama, M / Sumisawa, K / Sutcliffe, W / Suzuki, S Y / Svidras, H / Takizawa, M / Tanida, K / Tanigawa, H / Tenchini, F / Thaller, A / Tiwary, R / Tonelli, D / Torassa, E / Toutounji, N / Trabelsi, K / Uchida, M / Ueda, I / Uematsu, Y / Uglov, T / Unger, K / Unno, Y / Uno, K / Uno, S / Ushiroda, Y / Vahsen, S E / van Tonder, R / Varner, G S / Vinokurova, A / Vitale, L / Vobbilisetti, V / Wakeling, H M / Wang, E / Wang, M-Z / Warburton, A / Watanuki, S / Welsch, M / Wessel, C / Won, E / Xu, X P / Yabsley, B D / Yamada, S / Yan, W / Yang, S B / Ye, H / Yelton, J / Yin, J H / Yook, Y M / Yoshihara, K / Yuan, C Z / Zani, L / Zhang, Y / Zhou, X Y / Zhukova, V I / Žlebčík, R

    Physical review letters

    2023  Volume 130, Issue 9, Page(s) 91902

    Abstract: We study the processes e^{+}e^{-}→ωχ_{bJ}(1P) (J=0, 1, or 2) using samples at center-of-mass energies sqrt[s]=10.701, 10.745, and 10.805 GeV, corresponding to 1.6, 9.8, and 4.7  fb^{-1} of integrated luminosity, respectively. These data were collected ... ...

    Abstract We study the processes e^{+}e^{-}→ωχ_{bJ}(1P) (J=0, 1, or 2) using samples at center-of-mass energies sqrt[s]=10.701, 10.745, and 10.805 GeV, corresponding to 1.6, 9.8, and 4.7  fb^{-1} of integrated luminosity, respectively. These data were collected with the Belle II detector during special operations of the SuperKEKB collider above the ϒ(4S) resonance. We report the first observation of ωχ_{bJ}(1P) signals at sqrt[s]=10.745  GeV. By combining Belle II data with Belle results at sqrt[s]=10.867  GeV, we find energy dependencies of the Born cross sections for e^{+}e^{-}→ωχ_{b1,b2}(1P) to be consistent with the shape of the ϒ(10753) state. These data indicate that the internal structures of the ϒ(10753) and ϒ(10860) states may differ. Including data at sqrt[s]=10.653  GeV, we also search for the bottomonium equivalent of the X(3872) state decaying into ωϒ(1S). No significant signal is observed for masses between 10.45 and 10.65  GeV/c^{2}.
    Language English
    Publishing date 2023-02-24
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.130.091902
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Precise Measurement of the D_{s}^{+} Lifetime at Belle II.

    Adachi, I / Aggarwal, L / Aihara, H / Akopov, N / Aloisio, A / Anh Ky, N / Asner, D M / Atmacan, H / Aushev, T / Aushev, V / Aversano, M / Babu, V / Bae, H / Bahinipati, S / Bambade, P / Banerjee, Sw / Barrett, M / Baudot, J / Bauer, M /
    Baur, A / Beaubien, A / Becker, J / Behera, P K / Bennett, J V / Bernlochner, F U / Bertacchi, V / Bertemes, M / Bertholet, E / Bessner, M / Bettarini, S / Bhuyan, B / Bianchi, F / Bilka, T / Biswas, D / Bodrov, D / Bondar, A / Bozek, A / Bračko, M / Branchini, P / Briere, R A / Browder, T E / Budano, A / Bussino, S / Campajola, M / Cao, L / Casarosa, G / Cecchi, C / Cerasoli, J / Chang, M-C / Chang, P / Cheema, P / Chekelian, V / Cheon, B G / Chilikin, K / Chirapatpimol, K / Cho, H-E / Cho, K / Choi, S-K / Choudhury, S / Cochran, J / Corona, L / Das, S / Dattola, F / De La Motte, S A / de Marino, G / De Nardo, G / De Nuccio, M / De Pietro, G / de Sangro, R / Destefanis, M / Dey, S / Dhamija, R / Di Canto, A / Di Capua, F / Dingfelder, J / Doležal, Z / Domínguez Jiménez, I / Dong, T V / Dorigo, M / Dort, K / Dreyer, S / Dubey, S / Dujany, G / Ecker, P / Epifanov, D / Feichtinger, P / Ferlewicz, D / Finck, C / Finocchiaro, G / Fodor, A / Forti, F / Frey, A / Fulsom, B G / Gabrielli, A / Ganiev, E / Garcia-Hernandez, M / Garmash, A / Gaudino, G / Gaur, V / Gaz, A / Gellrich, A / Ghevondyan, G / Ghosh, D / Ghumaryan, H / Giakoustidis, G / Giordano, R / Giri, A / Glazov, A / Gobbo, B / Godang, R / Gogota, O / Goldenzweig, P / Gradl, W / Graziani, E / Greenwald, D / Gruberová, Z / Gu, T / Guan, Y / Gudkova, K / Han, Y / Hayasaka, K / Hayashii, H / Hazra, S / Hearty, C / Heredia de la Cruz, I / Hershenhorn, A / Higuchi, T / Hill, E C / Hoek, M / Hohmann, M / Hsu, C-L / Humair, T / Iijima, T / Inami, K / Ipsita, N / Ishikawa, A / Ito, S / Itoh, R / Iwasaki, M / Jackson, P / Jacobs, W W / Jaffe, D E / Jang, E-J / Ji, Q P / Jia, S / Jin, Y / Junkerkalefeld, H / Kaliyar, A B / Kandra, J / Karyan, G / Kawasaki, T / Keil, F / Ketter, C / Kiesling, C / Kim, C-H / Kim, D Y / Kim, K-H / Kim, Y-K / Kindo, H / Kinoshita, K / Kodyš, P / Koga, T / Kohani, S / Kojima, K / Korobov, A / Korpar, S / Kowalewski, R / Kraetzschmar, T M G / Križan, P / Krokovny, P / Kuhr, T / Kumar, J / Kumar, M / Kumar, R / Kumara, K / Kuzmin, A / Kwon, Y-J / Lacaprara, S / Lai, Y-T / Lam, T / Lange, J S / Laurenza, M / Leboucher, R / Le Diberder, F R / Leitl, P / Levit, D / Lewis, P M / Li, L K / Libby, J / Liu, Q Y / Liu, Z Q / Liventsev, D / Longo, S / Lueck, T / Lyu, C / Ma, Y / Maggiora, M / Maharana, S P / Maiti, R / Maity, S / Manfredi, R / Manoni, E / Mantovano, M / Marcantonio, D / Marcello, S / Marinas, C / Martellini, C / Martini, A / Martinov, T / Massaccesi, L / Masuda, M / Matsuda, T / Matsuoka, K / Matvienko, D / Maurya, S K / McKenna, J A / Mehta, R / Meier, F / Merola, M / Metzner, F / Milesi, M / Miller, C / Mirra, M / Miyabayashi, K / Mohanty, G B / Molina-Gonzalez, N / Mondal, S / Moneta, S / Moser, H-G / Mrvar, M / Mussa, R / Nakamura, I / Nakazawa, Y / Narimani Charan, A / Naruki, M / Natkaniec, Z / Natochii, A / Nayak, L / Nazaryan, G / Nisar, N K / Nishida, S / Ono, H / Otani, F / Oxford, E R / Pakhlov, P / Pakhlova, G / Paladino, A / Panta, A / Paoloni, E / Pardi, S / Passeri, A / Patra, S / Paul, S / Pedlar, T K / Peruzzi, I / Peschke, R / Pestotnik, R / Pham, F / Piccolo, M / Piilonen, L E / Podobnik, T / Pokharel, S / Praz, C / Prell, S / Prencipe, E / Prim, M T / Purwar, H / Rados, P / Raeuber, G / Raiz, S / Reif, M / Reiter, S / Remnev, M / Ripp-Baudot, I / Rizzo, G / Roney, J M / Rostomyan, A / Rout, N / Russo, G / Sandilya, S / Sangal, A / Santelj, L / Sato, Y / Savinov, V / Scavino, B / Schmitt, C / Schwanda, C / Schwartz, A J / Seino, Y / Selce, A / Senyo, K / Serrano, J / Sevior, M E / Sfienti, C / Shan, W / Shi, X D / Shillington, T / Shiu, J-G / Shtol, D / Sibidanov, A / Simon, F / Sobie, R J / Sobotzik, M / Soffer, A / Sokolov, A / Solovieva, E / Spataro, S / Spruck, B / Starič, M / Stavroulakis, P / Stottler, Z S / Stroili, R / Sumihama, M / Svidras, H / Takahashi, M / Takizawa, M / Tamponi, U / Tanida, K / Tenchini, F / Tittel, O / Tonelli, D / Torassa, E / Trabelsi, K / Tsaklidis, I / Unger, K / Unno, Y / Uno, K / Uno, S / Urquijo, P / Ushiroda, Y / Vahsen, S E / van Tonder, R / Varvell, K E / Veronesi, M / Vismaya, V S / Vitale, L / Volpe, R / Wach, B / Wallner, S / Wang, E / Wang, M-Z / Wang, X L / Wang, Z / Warburton, A / Watanabe, M / Wessel, C / Won, E / Xu, X P / Yabsley, B D / Yamada, S / Yan, W / Yang, S B / Yoshihara, K / Yuan, C Z / Yusa, Y / Zhang, Y / Zhilich, V / Zhou, J S / Zhou, Q D / Zhukova, V I / Žlebčík, R

    Physical review letters

    2023  Volume 131, Issue 17, Page(s) 171803

    Abstract: We measure the lifetime of the D_{s}^{+} meson using a data sample of 207  fb^{-1} collected by the Belle II experiment running at the SuperKEKB asymmetric-energy e^{+}e^{-} collider. The lifetime is determined by fitting the decay-time distribution of a ...

    Abstract We measure the lifetime of the D_{s}^{+} meson using a data sample of 207  fb^{-1} collected by the Belle II experiment running at the SuperKEKB asymmetric-energy e^{+}e^{-} collider. The lifetime is determined by fitting the decay-time distribution of a sample of 116×10^{3} D_{s}^{+}→ϕπ^{+} decays. Our result is τ_{D_{s}^{+}}=(499.5±1.7±0.9)  fs, where the first uncertainty is statistical and the second is systematic. This result is significantly more precise than previous measurements.
    Language English
    Publishing date 2023-11-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.171803
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Tests of Light-Lepton Universality in Angular Asymmetries of B^{0}→D^{*-}ℓν Decays.

    Adachi, I / Adamczyk, K / Aggarwal, L / Aihara, H / Akopov, N / Aloisio, A / Anh Ky, N / Asner, D M / Atmacan, H / Aushev, T / Aushev, V / Aversano, M / Babu, V / Bae, H / Bahinipati, S / Bambade, P / Banerjee, Sw / Barrett, M / Baudot, J /
    Bauer, M / Baur, A / Beaubien, A / Becherer, F / Becker, J / Behera, P K / Bennett, J V / Bernlochner, F U / Bertacchi, V / Bertemes, M / Bertholet, E / Bessner, M / Bettarini, S / Bhuyan, B / Bianchi, F / Bilka, T / Biswas, D / Bobrov, A / Bodrov, D / Bolz, A / Bondar, A / Borah, J / Bozek, A / Bračko, M / Branchini, P / Briere, R A / Browder, T E / Budano, A / Bussino, S / Campajola, M / Cao, L / Casarosa, G / Cecchi, C / Cerasoli, J / Chang, M-C / Chang, P / Cheaib, R / Cheema, P / Chekelian, V / Cheon, B G / Chilikin, K / Chirapatpimol, K / Cho, H-E / Cho, K / Choi, S-K / Choudhury, S / Cochran, J / Corona, L / Cremaldi, L M / Das, S / Dattola, F / De La Cruz-Burelo, E / De La Motte, S A / De Nardo, G / De Nuccio, M / De Pietro, G / de Sangro, R / Destefanis, M / Dey, S / Dhamija, R / Di Canto, A / Di Capua, F / Dingfelder, J / Doležal, Z / Domínguez Jiménez, I / Dong, T V / Dorigo, M / Dort, K / Dossett, D / Dreyer, S / Dubey, S / Dujany, G / Ecker, P / Eliachevitch, M / Epifanov, D / Feichtinger, P / Ferber, T / Ferlewicz, D / Fillinger, T / Finck, C / Finocchiaro, G / Fodor, A / Forti, F / Frey, A / Fulsom, B G / Gabrielli, A / Ganiev, E / Garcia-Hernandez, M / Garg, R / Garmash, A / Gaudino, G / Gaur, V / Gaz, A / Gellrich, A / Ghevondyan, G / Ghosh, D / Ghumaryan, H / Giakoustidis, G / Giordano, R / Giri, A / Gobbo, B / Godang, R / Gogota, O / Goldenzweig, P / Gradl, W / Granderath, S / Graziani, E / Greenwald, D / Gruberová, Z / Gu, T / Guan, Y / Gudkova, K / Halder, S / Han, Y / Hara, T / Hayasaka, K / Hayashii, H / Hazra, S / Hearty, C / Hedges, M T / Heidelbach, A / Heredia de la Cruz, I / Hernández Villanueva, M / Hershenhorn, A / Higuchi, T / Hill, E C / Hoek, M / Hohmann, M / Horak, P / Hsu, C-L / Iijima, T / Inami, K / Inguglia, G / Ipsita, N / Ishikawa, A / Ito, S / Itoh, R / Iwasaki, M / Jackson, P / Jacobs, W W / Jang, E-J / Ji, Q P / Jia, S / Jin, Y / Johnson, A / Junkerkalefeld, H / Kaliyar, A B / Kandra, J / Kang, K H / Karyan, G / Kawasaki, T / Keil, F / Ketter, C / Kiesling, C / Kim, C-H / Kim, D Y / Kim, K-H / Kim, Y-K / Kindo, H / Kinoshita, K / Kodyš, P / Koga, T / Kohani, S / Kojima, K / Konno, T / Korobov, A / Korpar, S / Kovalenko, E / Kowalewski, R / Kraetzschmar, T M G / Križan, P / Krokovny, P / Kuhr, T / Kumar, J / Kumar, M / Kumara, K / Kunigo, T / Kuzmin, A / Kwon, Y-J / Lacaprara, S / Lai, Y-T / Lam, T / Lanceri, L / Lange, J S / Laurenza, M / Leboucher, R / Le Diberder, F R / Leitl, P / Levit, D / Lewis, P M / Li, C / Li, L K / Li, Y / Libby, J / Liu, Q Y / Liu, Z Q / Liventsev, D / Longo, S / Lueck, T / Luo, T / Lyu, C / Ma, Y / Maggiora, M / Maharana, S P / Maiti, R / Maity, S / Mancinelli, G / Manfredi, R / Manoni, E / Manthei, A C / Mantovano, M / Marcantonio, D / Marcello, S / Marinas, C / Martel, L / Martellini, C / Martini, A / Martinov, T / Massaccesi, L / Masuda, M / Matsuda, T / Matvienko, D / Maurya, S K / McKenna, J A / Mehta, R / Meier, F / Merola, M / Metzner, F / Milesi, M / Miller, C / Mirra, M / Miyabayashi, K / Mohanty, G B / Molina-Gonzalez, N / Mondal, S / Moneta, S / Moser, H-G / Mrvar, M / Mussa, R / Nakamura, I / Nakazawa, Y / Narimani Charan, A / Naruki, M / Natkaniec, Z / Natochii, A / Nayak, L / Nazaryan, G / Nisar, N K / Nishida, S / Ogawa, S / Ono, H / Oskin, P / Otani, F / Pakhlov, P / Pakhlova, G / Paladino, A / Panta, A / Paoloni, E / Pardi, S / Parham, K / Park, S-H / Paschen, B / Passeri, A / Patra, S / Paul, S / Pedlar, T K / Peruzzi, I / Peschke, R / Pestotnik, R / Pham, F / Piccolo, M / Piilonen, L E / Podesta-Lerma, P L M / Podobnik, T / Pokharel, S / Praz, C / Prell, S / Prencipe, E / Prim, M T / Purwar, H / Rad, N / Rados, P / Raeuber, G / Raiz, S / Reif, M / Reiter, S / Remnev, M / Ripp-Baudot, I / Rizzo, G / Robertson, S H / Roehrken, M / Roney, J M / Rostomyan, A / Rout, N / Russo, G / Sahoo, D / Sandilya, S / Sangal, A / Santelj, L / Sato, Y / Savinov, V / Scavino, B / Schmitt, C / Schnepf, M / Schwanda, C / Seino, Y / Selce, A / Senyo, K / Serrano, J / Sevior, M E / Sfienti, C / Shan, W / Sharma, C / Shen, C P / Shi, X D / Shillington, T / Shiu, J-G / Shtol, D / Shwartz, B / Sibidanov, A / Simon, F / Singh, J B / Skorupa, J / Sobie, R J / Sobotzik, M / Soffer, A / Sokolov, A / Solovieva, E / Spataro, S / Spruck, B / Starič, M / Stavroulakis, P / Stefkova, S / Stottler, Z S / Stroili, R / Strube, J / Sumihama, M / Sumisawa, K / Sutcliffe, W / Svidras, H / Takahashi, M / Takizawa, M / Tamponi, U / Tanida, K / Tenchini, F / Thaller, A / Tittel, O / Tiwary, R / Tonelli, D / Torassa, E / Toutounji, N / Trabelsi, K / Tsaklidis, I / Uchida, M / Ueda, I / Uematsu, Y / Uglov, T / Unger, K / Unno, Y / Uno, K / Uno, S / Urquijo, P / Ushiroda, Y / Vahsen, S E / van Tonder, R / Varner, G S / Varvell, K E / Veronesi, M / Vismaya, V S / Vitale, L / Vobbilisetti, V / Volpe, R / Wach, B / Waheed, E / Wakai, M / Wallner, S / Wang, E / Wang, M-Z / Wang, Z / Warburton, A / Watanabe, M / Watanuki, S / Welsch, M / Wessel, C / Xu, X P / Yabsley, B D / Yamada, S / Yan, W / Yang, S B / Yin, J H / Yoshihara, K / Yuan, C Z / Zani, L / Zhang, Y / Zhilich, V / Zhou, J S / Zhou, Q D / Zhukova, V I / Žlebčík, R

    Physical review letters

    2023  Volume 131, Issue 18, Page(s) 181801

    Abstract: We present the first comprehensive tests of the universality of the light leptons in the angular distributions of semileptonic B^{0}-meson decays to charged spin-1 charmed mesons. We measure five angular-asymmetry observables as functions of the decay ... ...

    Abstract We present the first comprehensive tests of the universality of the light leptons in the angular distributions of semileptonic B^{0}-meson decays to charged spin-1 charmed mesons. We measure five angular-asymmetry observables as functions of the decay recoil that are sensitive to lepton-universality-violating contributions. We use events where one neutral B is fully reconstructed in ϒ(4S)→BB[over ¯] decays in data corresponding to 189  fb^{-1} integrated luminosity from electron-positron collisions collected with the Belle II detector. We find no significant deviation from the standard model expectations.
    Language English
    Publishing date 2023-11-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.181801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Measurement of CP Violation in B^{0}→K_{S}^{0}π^{0} Decays at Belle II.

    Adachi, I / Adamczyk, K / Aggarwal, L / Ahmed, H / Aihara, H / Akopov, N / Aloisio, A / Anh Ky, N / Asner, D M / Atmacan, H / Aushev, T / Aushev, V / Aversano, M / Babu, V / Bae, H / Bahinipati, S / Bambade, P / Banerjee, Sw / Barrett, M /
    Baudot, J / Bauer, M / Baur, A / Beaubien, A / Becker, J / Behera, P K / Bennett, J V / Bertacchi, V / Bertemes, M / Bertholet, E / Bessner, M / Bettarini, S / Bhuyan, B / Bianchi, F / Bilka, T / Biswas, D / Bodrov, D / Bondar, A / Borah, J / Bozek, A / Bračko, M / Branchini, P / Briere, R A / Browder, T E / Budano, A / Bussino, S / Campajola, M / Cao, L / Casarosa, G / Cecchi, C / Cerasoli, J / Chang, P / Cheaib, R / Cheema, P / Chekelian, V / Chen, C / Cheon, B G / Chilikin, K / Chirapatpimol, K / Cho, H-E / Cho, K / Cho, S-J / Choi, S-K / Choudhury, S / Cochran, J / Corona, L / Cremaldi, L M / Das, S / Dattola, F / De La Cruz-Burelo, E / De La Motte, S A / de Marino, G / De Nuccio, M / De Pietro, G / de Sangro, R / Destefanis, M / De Yta-Hernandez, A / Dhamija, R / Di Canto, A / Di Capua, F / Dingfelder, J / Doležal, Z / Domínguez Jiménez, I / Dong, T V / Dorigo, M / Dort, K / Dreyer, S / Dubey, S / Dujany, G / Ecker, P / Eliachevitch, M / Feichtinger, P / Ferber, T / Ferlewicz, D / Fillinger, T / Finck, C / Finocchiaro, G / Fodor, A / Forti, F / Fulsom, B G / Gabrielli, A / Ganiev, E / Garcia-Hernandez, M / Garg, R / Garmash, A / Gaudino, G / Gaur, V / Gaz, A / Gellrich, A / Ghosh, D / Giakoustidis, G / Giordano, R / Giri, A / Glazov, A / Gobbo, B / Godang, R / Goldenzweig, P / Gradl, W / Grammatico, T / Granderath, S / Graziani, E / Greenwald, D / Gruberová, Z / Gu, T / Guan, Y / Gudkova, K / Halder, S / Han, Y / Hara, K / Hara, T / Hayasaka, K / Hayashii, H / Hazra, S / Hearty, C / Hedges, M T / Heredia de la Cruz, I / Hernández Villanueva, M / Hershenhorn, A / Higuchi, T / Hill, E C / Hoek, M / Hohmann, M / Hsu, C-L / Humair, T / Iijima, T / Inami, K / Ipsita, N / Ishikawa, A / Ito, S / Itoh, R / Iwasaki, M / Jackson, P / Jacobs, W W / Jang, E-J / Ji, Q P / Jia, S / Jin, Y / Johnson, A / Joo, K K / Junkerkalefeld, H / Kaleta, M / Kaliyar, A B / Kandra, J / Kang, K H / Kang, S / Kar, S / Karyan, G / Kawasaki, T / Keil, F / Ketter, C / Kiesling, C / Kim, C-H / Kim, D Y / Kim, K-H / Kim, Y-K / Kindo, H / Kodyš, P / Koga, T / Kohani, S / Kojima, K / Korobov, A / Korpar, S / Kovalenko, E / Kowalewski, R / Kraetzschmar, T M G / Križan, P / Krokovny, P / Kuhr, T / Kumar, J / Kumar, M / Kumara, K / Kunigo, T / Kuzmin, A / Kwon, Y-J / Lacaprara, S / Lai, Y-T / Lam, T / Lange, J S / Laurenza, M / Leboucher, R / Le Diberder, F R / Leitl, P / Levit, D / Li, C / Li, L K / Libby, J / Liu, Q Y / Liu, Z Q / Liventsev, D / Longo, S / Lueck, T / Luo, T / Lyu, C / Ma, Y / Maggiora, M / Maharana, S P / Maiti, R / Maity, S / Mancinelli, G / Manfredi, R / Manoni, E / Mantovano, M / Marcantonio, D / Marcello, S / Marinas, C / Martel, L / Martellini, C / Martinov, T / Massaccesi, L / Masuda, M / Matsuda, T / Matsuoka, K / Matvienko, D / Maurya, S K / McKenna, J A / Mehta, R / Meier, F / Merola, M / Metzner, F / Milesi, M / Miller, C / Mirra, M / Miyabayashi, K / Mizuk, R / Mohanty, G B / Molina-Gonzalez, N / Mondal, S / Moneta, S / Moser, H-G / Mrvar, M / Mussa, R / Nakamura, I / Nakazawa, Y / Narimani Charan, A / Naruki, M / Natochii, A / Nayak, L / Nayak, M / Nazaryan, G / Nisar, N K / Nishida, S / Ono, H / Onuki, Y / Oskin, P / Pakhlov, P / Pakhlova, G / Paladino, A / Paoloni, E / Pardi, S / Parham, K / Park, H / Park, S-H / Passeri, A / Patra, S / Paul, S / Pedlar, T K / Peschke, R / Pestotnik, R / Pham, F / Piccolo, M / Piilonen, L E / Podesta-Lerma, P L M / Podobnik, T / Pokharel, S / Praz, C / Prell, S / Prencipe, E / Prim, M T / Purwar, H / Rad, N / Rados, P / Raeuber, G / Raiz, S / Reif, M / Reiter, S / Remnev, M / Ripp-Baudot, I / Rizzo, G / Robertson, S H / Roehrken, M / Roney, J M / Rostomyan, A / Rout, N / Russo, G / Sahoo, D / Sandilya, S / Sangal, A / Santelj, L / Sato, Y / Savinov, V / Scavino, B / Schmitt, C / Schwanda, C / Schwartz, A J / Seino, Y / Selce, A / Senyo, K / Serrano, J / Sevior, M E / Sfienti, C / Shan, W / Sharma, C / Shi, X D / Shillington, T / Shiu, J-G / Shtol, D / Sibidanov, A / Simon, F / Singh, J B / Skorupa, J / Sobie, R J / Sobotzik, M / Soffer, A / Sokolov, A / Solovieva, E / Spataro, S / Spruck, B / Starič, M / Stavroulakis, P / Stefkova, S / Stottler, Z S / Stroili, R / Sumihama, M / Sumisawa, K / Sutcliffe, W / Svidras, H / Takahashi, M / Takizawa, M / Tamponi, U / Tanaka, S / Tanida, K / Tenchini, F / Thaller, A / Tittel, O / Tiwary, R / Tonelli, D / Torassa, E / Trabelsi, K / Tsaklidis, I / Uchida, M / Ueda, I / Uglov, T / Unger, K / Unno, Y / Uno, K / Uno, S / Urquijo, P / Ushiroda, Y / Vahsen, S E / van Tonder, R / Varner, G S / Varvell, K E / Vinokurova, A / Vismaya, V S / Vitale, L / Wach, B / Wakai, M / Wakeling, H M / Wallner, S / Wang, E / Wang, M-Z / Wang, Z / Warburton, A / Watanabe, M / Watanuki, S / Welsch, M / Wessel, C / Won, E / Xu, X P / Yabsley, B D / Yamada, S / Yan, W / Yang, S B / Yin, J H / Yoshihara, K / Yuan, C Z / Yusa, Y / Zani, L / Zhang, Y / Zhilich, V / Zhou, Q D / Zhukova, V I

    Physical review letters

    2023  Volume 131, Issue 11, Page(s) 111803

    Abstract: We report a measurement of the CP-violating parameters C and S in B^{0}→K_{S}^{0}π^{0} decays at Belle II using a sample of 387×10^{6}  BB[over ¯] events recorded in e^{+}e^{-} collisions at a center-of-mass energy corresponding to the ϒ(4S) resonance. ... ...

    Abstract We report a measurement of the CP-violating parameters C and S in B^{0}→K_{S}^{0}π^{0} decays at Belle II using a sample of 387×10^{6}  BB[over ¯] events recorded in e^{+}e^{-} collisions at a center-of-mass energy corresponding to the ϒ(4S) resonance. These parameters are determined by fitting the proper decay-time distribution of a sample of 415 signal events. We obtain C=-0.04_{-0.15}^{+0.14}±0.05 and S=0.75_{-0.23}^{+0.20}±0.04, where the first uncertainties are statistical and the second are systematic.
    Language English
    Publishing date 2023-09-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.111803
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Measurement of the Λ_{c}^{+} Lifetime.

    Abudinén, F / Aggarwal, L / Ahmed, H / Ahn, J K / Aihara, H / Akopov, N / Aloisio, A / Anh Ky, N / Asner, D M / Atmacan, H / Aushev, T / Aushev, V / Babu, V / Bae, H / Bambade, P / Banerjee, Sw / Bansal, S / Baudot, J / Bauer, M /
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    Physical review letters

    2023  Volume 130, Issue 7, Page(s) 71802

    Abstract: An absolute measurement of the Λ_{c}^{+} lifetime is reported using Λ_{c}^{+}→pK^{-}π^{+} decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated ... ...

    Abstract An absolute measurement of the Λ_{c}^{+} lifetime is reported using Λ_{c}^{+}→pK^{-}π^{+} decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated luminosity of the data sample, which was collected at center-of-mass energies at or near the ϒ(4S) resonance, is 207.2  fb^{-1}. The result, τ(Λ_{c}^{+})=203.20±0.89±0.77  fs, where the first uncertainty is statistical and the second systematic, is the most precise measurement to date and is consistent with previous determinations.
    Language English
    Publishing date 2023-03-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.130.071802
    Database MEDical Literature Analysis and Retrieval System OnLINE

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