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  1. Book ; Online: Angular analysis of $B^+ \to \rho^+\rho^0$ decays reconstructed in 2019, 2020, and 2021 Belle II data

    Belle II Collaboration / Abudinén, F. / Adachi, I. / Adamczyk, K. / Aggarwal, L. / Ahlburg, P. / Ahmed, H. / Ahn, J. K. / Aihara, H. / Akopov, N. / Aloisio, A. / Ameli, F. / Andricek, L. / Ky, N. Anh / Asner, D. M. / Atmacan, H. / Aulchenko, V. / Aushev, T. / Aushev, V. /
    Aziz, T. / Babu, V. / Bacher, S. / Bae, H. / Baehr, S. / Bahinipati, S. / Bakich, A. M. / Bambade, P. / Banerjee, Sw. / Bansal, S. / Barrett, M. / Batignani, G. / Baudot, J. / Bauer, M. / Baur, A. / Beaubien, A. / Beaulieu, A. / Becker, J. / Behera, P. K. / 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.

    2022  

    Abstract: We report on a Belle II measurement of the branching fraction ($\mathcal{B}$), longitudinal polarization fraction ($f_L$), and CP asymmetry ($\mathcal{A}_{CP}$) of $B^+\to \rho^+\rho^0$ decays. We reconstruct $B^+\to \rho^+(\to \pi^+\pi^0(\to \gamma\ ... ...

    Abstract We report on a Belle II measurement of the branching fraction ($\mathcal{B}$), longitudinal polarization fraction ($f_L$), and CP asymmetry ($\mathcal{A}_{CP}$) of $B^+\to \rho^+\rho^0$ decays. We reconstruct $B^+\to \rho^+(\to \pi^+\pi^0(\to \gamma\gamma))\rho^0(\to \pi^+\pi^-)$ decays in a sample of SuperKEKB electron-positron collisions collected by the Belle II experiment in 2019, 2020, and 2021 at the $\Upsilon$(4S) resonance and corresponding to 190 fb$^{-1}$ of integrated luminosity. We fit the distributions of the difference between expected and observed $B$ candidate energy, continuum-suppression discriminant, dipion masses, and decay angles of the selected samples, to determine a signal yield of $345 \pm 31$ events. The signal yields are corrected for efficiencies determined from simulation and control data samples to obtain $\mathcal{B}(B^+ \to \rho^+\rho^0) = [23.2^{+\ 2.2}_{-\ 2.1} (\rm stat) \pm 2.7 (\rm syst)]\times 10^{-6}$, $f_L = 0.943 ^{+\ 0.035}_{-\ 0.033} (\rm stat)\pm 0.027(\rm syst)$, and $\mathcal{A}_{CP}=-0.069 \pm 0.068(\rm stat) \pm 0.060 (\rm syst)$. The results agree with previous measurements. This is the first measurement of $\mathcal{A}_{CP}$ in $B^+\to \rho^+\rho^0$ decays reported by Belle II.
    Keywords High Energy Physics - Experiment ; High Energy Physics - Phenomenology
    Subject code 571
    Publishing date 2022-06-24
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Book ; Online: Measurements of the branching fraction, isospin asymmetry, and lepton-universality ratio in $B \to J/\psi K$ decays at Belle II

    Belle II Collaboration / Abudinén, F. / Adachi, I. / Adak, R. / Adamczyk, K. / Aggarwal, L. / Ahlburg, P. / Ahmed, H. / Ahn, J. K. / Aihara, H. / Akopov, N. / Aloisio, A. / Ameli, F. / Andricek, L. / Ky, N. Anh / Asner, D. M. / Atmacan, H. / Aulchenko, V. / Aushev, T. /
    Aushev, V. / Aziz, T. / Babu, V. / Bacher, S. / Bae, H. / Baehr, S. / Bahinipati, S. / Bakich, A. M. / Bambade, P. / Banerjee, Sw. / Bansal, S. / Barrett, M. / Batignani, G. / Baudot, J. / Bauer, M. / Baur, A. / Beaubien, A. / Beaulieu, A. / Becker, J. / Behera, P. K. / Bennett, J. V. / Bernieri, E. / Bernlochner, F. U. / Bertemes, M. / Bertholet, E. / Bessner, M. / Bettarini, S. / Bhardwaj, V. / Bhuyan, B. / Bianchi, F. / Bilka, T.

    2022  

    Abstract: We report a study of $B \to J/\psi(\ell^{+}\ell^{-})K$ decays, where $\ell$ represents an electron or a muon, using $e^{+}e^{-}$ collisions at the $\Upsilon(4S)$ resonance. The data were collected by the Belle II experiment at the SuperKEKB asymmetric- ... ...

    Abstract We report a study of $B \to J/\psi(\ell^{+}\ell^{-})K$ decays, where $\ell$ represents an electron or a muon, using $e^{+}e^{-}$ collisions at the $\Upsilon(4S)$ resonance. The data were collected by the Belle II experiment at the SuperKEKB asymmetric-energy collider during 2019-2021, corresponding to an integrated luminosity of $189$ fb$^{-1}$. The measured quantities are the branching fractions (${\mathcal B}$) of the decay channels $B^{+} \to J/\psi(e^{+}e^{-})K^{+}$, $B^{+} \to J/\psi(\mu^{+}\mu^{-}) K^{+}$, $B^{0} \to J/\psi(e^{+}e^{-}) K^{0}_{S}$, and $B^{0} \to J/\psi(\mu^{+}\mu^{-})K^{0}_{S}$; the lepton-flavor-dependent isospin asymmetries for the electron [$A_{I}\left(B \to J/\psi(e^{+}e^{-}) K\right)$] and muon [$A_{I}\left(B \to J/\psi(\mu^{+} \mu^{-}) K\right)$] channels; and the ratios of branching fractions between the muon and electron channels for the charged [$R_{K^{+}}\left(J/\psi\right)$] and neutral kaon [$R_{K^{0}}\left(J/\psi\right)$] case. The measurements are consistent with the world-average values.
    Keywords High Energy Physics - Experiment
    Subject code 612
    Publishing date 2022-07-22
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Measurement of R(D) and R(D^{*}) with a Semileptonic Tagging Method.

    Caria, G / Urquijo, P / Adachi, I / Aihara, H / Al Said, S / Asner, D M / Atmacan, H / Aushev, T / Babu, V / Badhrees, I / Bahinipati, S / Bakich, A M / Behera, P / Beleño, C / Bennett, J / Bhuyan, B / Bilka, T / Biswal, J / Bozek, A /
    Bračko, M / Browder, T E / Campajola, M / Červenkov, D / Chang, P / Cheaib, R / Chekelian, V / Chen, A / Cheon, B G / Chilikin, K / Cho, H E / Cho, K / Choi, Y / Choudhury, S / Cinabro, D / Cunliffe, S / Dash, N / De Nardo, G / Di Capua, F / Di Carlo, S / Doležal, Z / Dong, T V / Eidelman, S / Epifanov, D / Fast, J E / Ferber, T / Ferlewicz, D / Fulsom, B G / Garg, R / Gaur, V / Gabyshev, N / Garmash, A / Giri, A / Goldenzweig, P / Greenwald, D / Grzymkowska, O / Guan, Y / Hartbrich, O / Hayasaka, K / Hayashii, H / Higuchi, T / Hou, W-S / Hsu, C-L / Iijima, T / Inami, K / Inguglia, G / Ishikawa, A / Itoh, R / Iwasaki, M / Iwasaki, Y / Jacobs, W W / Jeon, H B / Jia, S / Jin, Y / Joffe, D / Joo, K K / Kaliyar, A B / Kang, K H / Karyan, G / Kawasaki, T / Kichimi, H / Kim, C H / Kim, D Y / Kim, H J / Kim, K T / Kim, S H / Kinoshita, K / Kodyš, P / Korpar, S / Kotchetkov, D / Križan, P / Kroeger, R / Krohn, J-F / Krokovny, P / Kuhr, T / Kumar, R / Kwon, Y-J / Lange, J S / Lee, I S / Lee, J K / Lee, S C / Li, L K / Li, Y B / Li Gioi, L / Libby, J / Lieret, K / Liventsev, D / Luo, T / MacQueen, C / Masuda, M / Matsuda, T / Matvienko, D / Merola, M / Metzner, F / Miyabayashi, K / Mohanty, G B / Moon, T J / Mori, T / Mussa, R / Nakamura, K R / Nakao, M / Nath, K J / Nayak, M / Nisar, N K / Nishida, S / Nishimura, K / Ogawa, K / Ono, H / Onuki, Y / Oskin, P / Pakhlov, P / Pakhlova, G / Pal, B / Pang, T / Park, H / Park, S-H / Patra, S / Paul, S / Pedlar, T K / Pestotnik, R / Piilonen, L E / Popov, V / Prencipe, E / Prim, M T / Rabusov, A / Resmi, P K / Ritter, M / Rozanska, M / Russo, G / Sahoo, D / Sakai, Y / Sandilya, S / Santelj, L / Sanuki, T / Savinov, V / Schneider, O / Schnell, G / Schueler, J / Schwanda, C / Schwartz, A J / Seino, Y / Senyo, K / Sevior, M E / Shebalin, V / Shiu, J-G / Shwartz, B / Simon, F / Sokolov, A / Solovieva, E / Starič, M / Stottler, Z S / Sumiyoshi, T / Sutcliffe, W / Takizawa, M / Tamponi, U / Tanida, K / Tenchini, F / Trabelsi, K / Uchida, M / Uglov, T / Uno, S / Usov, Y / Vahsen, S E / Van Tonder, R / Varner, G / Varvell, K E / Vossen, A / Waheed, E / Wang, B / Wang, C H / Wang, M-Z / Wang, P / Wang, X L / Watanuki, S / Wiechczynski, J / Won, E / Yamamoto, H / Yang, S B / Ye, H / Yin, J H / Yuan, C Z / Zhang, Z P / Zhilich, V / Zhukova, V / Zhulanov, V

    Physical review letters

    2020  Volume 124, Issue 16, Page(s) 161803

    Abstract: The experimental results on the ratios of branching fractions R(D)=B(B[over ¯]→Dτ^{-}ν[over ¯]_{τ})/B(B[over ¯]→Dℓ^{-}ν[over ¯]_{ℓ}) and R(D^{*})=B(B[over ¯]→D^{*}τ^{-}ν[over ¯]_{τ})/B(B[over ¯]→D^{*}ℓ^{-}ν[over ¯]_{ℓ}), where ℓ denotes an electron or a ... ...

    Abstract The experimental results on the ratios of branching fractions R(D)=B(B[over ¯]→Dτ^{-}ν[over ¯]_{τ})/B(B[over ¯]→Dℓ^{-}ν[over ¯]_{ℓ}) and R(D^{*})=B(B[over ¯]→D^{*}τ^{-}ν[over ¯]_{τ})/B(B[over ¯]→D^{*}ℓ^{-}ν[over ¯]_{ℓ}), where ℓ denotes an electron or a muon, show a long-standing discrepancy with the standard model predictions, and might hint at a violation of lepton flavor universality. We report a new simultaneous measurement of R(D) and R(D^{*}), based on a data sample containing 772×10^{6}  BB[over ¯] events recorded at the ϒ(4S) resonance with the Belle detector at the KEKB e^{+}e^{-} collider. In this analysis the tag-side B meson is reconstructed in a semileptonic decay mode and the signal-side τ is reconstructed in a purely leptonic decay. The measured values are R(D)=0.307±0.037±0.016 and R(D^{*})=0.283±0.018±0.014, where the first uncertainties are statistical and the second are systematic. These results are in agreement with the standard model predictions within 0.2, 1.1, and 0.8 standard deviations for R(D), R(D^{*}), and their combination, respectively. This work constitutes the most precise measurements of R(D) and R(D^{*}) performed to date as well as the first result for R(D) based on a semileptonic tagging method.
    Language English
    Publishing date 2020-05-08
    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.124.161803
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Search for a Light CP-odd Higgs Boson and Low-Mass Dark Matter at the Belle Experiment.

    Seong, I S / Vahsen, S E / Adachi, I / Aihara, H / Al Said, S / Asner, D M / Aulchenko, V / Aushev, T / Ayad, R / Babu, V / Bakich, A M / Bansal, V / Behera, P / Bhardwaj, V / Bhuyan, B / Bilka, T / Biswal, J / Bobrov, A / Bonvicini, G /
    Bozek, A / Bračko, M / Browder, T E / Cao, L / Červenkov, D / Chang, P / Chekelian, V / Chen, A / Cheon, B G / Chilikin, K / Cho, K / Choi, Y / Choudhury, S / Cinabro, D / Cunliffe, S / Dash, N / Di Carlo, S / Dingfelder, J / Dong, T V / Eidelman, S / Epifanov, D / Fast, J E / Frey, A / Fulsom, B G / Garg, R / Gaur, V / Gabyshev, N / Garmash, A / Gelb, M / Giri, A / Goldenzweig, P / Golob, B / Guido, E / Haba, J / Hayasaka, K / Hayashii, H / Hedges, M T / Higuchi, T / Hou, W-S / Hsu, C-L / Huang, K / Iijima, T / Inami, K / Inguglia, G / Ishikawa, A / Itoh, R / Iwasaki, M / Iwasaki, Y / Jacobs, W W / Jeon, H B / Jia, S / Jin, Y / Joffe, D / Joo, K K / Julius, T / Kaliyar, A B / Karyan, G / Kawasaki, T / Kichimi, H / Kiesling, C / Kim, D Y / Kim, J B / Kim, K T / Kim, S H / Kinoshita, K / Kodyš, P / Korpar, S / Kotchetkov, D / Križan, P / Kroeger, R / Krokovny, P / Kuhr, T / Kumita, T / Kuzmin, A / Kwon, Y-J / Lange, J S / Lee, I S / Lee, S C / Li, L K / Li, Y B / Li Gioi, L / Libby, J / Liventsev, D / Lubej, M / Luo, T / MacQueen, C / Masuda, M / Matsuda, T / Merola, M / Miyabayashi, K / Miyata, H / Mizuk, R / Mohanty, G B / Mori, T / Mussa, R / Nakano, E / Nakao, M / Nanut, T / Nath, K J / Nayak, M / Niiyama, M / Nisar, N K / Nishida, S / Nishimura, K / Ogawa, S / Ono, H / Ostrowicz, W / Pakhlov, P / Pakhlova, G / Pal, B / Park, H / Pedlar, T K / Pestotnik, R / Piilonen, L E / Prencipe, E / Ritter, M / Rostomyan, A / Russo, G / Sakai, Y / Salehi, M / Sandilya, S / Santelj, L / Sanuki, T / Savinov, V / Schneider, O / Schnell, G / Schueler, J / Schwanda, C / Seino, Y / Senyo, K / Seon, O / Sevior, M E / Shen, C P / Shibata, T-A / Shiu, J-G / Simon, F / Solovieva, E / Stanič, S / Starič, M / Sumihama, M / Sumiyoshi, T / Sutcliffe, W / Takizawa, M / Tanida, K / Tenchini, F / Trabelsi, K / Uchida, M / Uglov, T / Unno, Y / Uno, S / Usov, Y / Van Hulse, C / Van Tonder, R / Varner, G / Vinokurova, A / Vossen, A / Wang, B / Wang, C H / Wang, P / Watanabe, M / Watanuki, S / Widmann, E / Won, E / Yamamoto, H / Ye, H / Yelton, J / Yuan, C Z / Yusa, Y / Zakharov, S / Zhang, Z P / Zhilich, V / Zhukova, V / Zhulanov, V / Zupanc, A

    Physical review letters

    2019  Volume 122, Issue 1, Page(s) 11801

    Abstract: We report on the first Belle search for a light CP-odd Higgs boson, A^{0}, that decays into low mass dark matter, χ, in final states with a single photon and missing energy. We search for events produced via the dipion transition ϒ(2S)→ϒ(1S)π^{+}π^{-}, ... ...

    Abstract We report on the first Belle search for a light CP-odd Higgs boson, A^{0}, that decays into low mass dark matter, χ, in final states with a single photon and missing energy. We search for events produced via the dipion transition ϒ(2S)→ϒ(1S)π^{+}π^{-}, followed by the on-shell process ϒ(1S)→γA^{0} with A^{0}→χχ, or by the off-shell process ϒ(1S)→γχχ. Utilizing a data sample of 157.3×10^{6} ϒ(2S) decays, we find no evidence for a signal. We set limits on the branching fractions of such processes in the mass ranges M_{A^{0}}<8.97  GeV/c^{2} and M_{χ}<4.44  GeV/c^{2}. We then use the limits on the off-shell process to set competitive limits on WIMP-nucleon scattering in the WIMP mass range below 5  GeV/c^{2}.
    Language English
    Publishing date 2019-04-23
    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.122.011801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Observation of Ξ(1620)^{0} and Evidence for Ξ(1690)^{0} in Ξ_{c}^{+}→Ξ^{-}π^{+}π^{+} Decays.

    Sumihama, M / Adachi, I / Ahn, J K / Aihara, H / Al Said, S / Asner, D M / Atmacan, H / Aushev, T / Ayad, R / Babu, V / Badhrees, I / Bahinipati, S / Bakich, A M / Bansal, V / Beleño, C / Berger, M / Bhardwaj, V / Bhuyan, B / Bilka, T /
    Biswal, J / Bonvicini, G / Bozek, A / Bračko, M / Browder, T E / Červenkov, D / Chekelian, V / Chen, A / Cheon, B G / Chilikin, K / Cho, K / Choi, S-K / Choi, Y / Choudhury, S / Cinabro, D / Cunliffe, S / Czank, T / Dash, N / Di Carlo, S / Doležal, Z / Dong, T V / Drásal, Z / Eidelman, S / Epifanov, D / Fast, J E / Fulsom, B G / Garg, R / Gaur, V / Gabyshev, N / Garmash, A / Gelb, M / Giri, A / Goldenzweig, P / Guido, E / Haba, J / Hayasaka, K / Hayashii, H / Hirose, S / Hou, W-S / Inami, K / Inguglia, G / Ishikawa, A / Itoh, R / Iwasaki, M / Iwasaki, Y / Jacobs, W W / Jeon, H B / Jia, S / Jin, Y / Joo, K K / Julius, T / Kaliyar, A B / Kang, K H / Karyan, G / Kato, Y / Kiesling, C / Kim, D Y / Kim, J B / Kim, K T / Kim, S H / Kinoshita, K / Kodyš, P / Korpar, S / Kotchetkov, D / Križan, P / Kroeger, R / Krokovny, P / Kumar, R / Kuzmin, A / Kwon, Y-J / Lange, J S / Lee, I S / Lee, S C / Li, L K / Li, Y B / Li Gioi, L / Libby, J / Liventsev, D / Lubej, M / Luo, T / Masuda, M / Matsuda, T / Matvienko, D / Merola, M / Miyabayashi, K / Miyata, H / Mizuk, R / Mohanty, G B / Moon, H K / Mori, T / Mussa, R / Nakano, E / Nakano, T / Nakao, M / Nanut, T / Nath, K J / Natkaniec, Z / Niiyama, M / Nisar, N K / Nishida, S / Ono, H / Pakhlov, P / Pakhlova, G / Pal, B / Pardi, S / Park, H / Paul, S / Pedlar, T K / Pestotnik, R / Piilonen, L E / Popov, V / Ritter, M / Russo, G / Sahoo, D / Sandilya, S / Santelj, L / Sanuki, T / Savinov, V / Schneider, O / Schnell, G / Schwanda, C / Seino, Y / Senyo, K / Sevior, M E / Shebalin, V / Shen, C P / Shibata, T-A / Shiu, J-G / Shwartz, B / Simon, F / Sokolov, A / Solovieva, E / Starič, M / Strube, J F / Sumiyoshi, T / Takizawa, M / Tamponi, U / Tanida, K / Taniguchi, N / Tenchini, F / Uchida, M / Uglov, T / Uno, S / Urquijo, P / Vahsen, S E / Van Hulse, C / Varner, G / Vorobyev, V / Vossen, A / Wang, B / Wang, C H / Wang, M-Z / Wang, P / Wang, X L / Watanabe, M / Watanuki, S / Widmann, E / Won, E / Ye, H / Yelton, J / Yuan, C Z / Yusa, Y / Zakharov, S / Zhang, Z P / Zhilich, V / Zhukova, V / Zhulanov, V

    Physical review letters

    2019  Volume 122, Issue 7, Page(s) 72501

    Abstract: We report the first observation of the double strange baryon Ξ(1620)^{0} in its decay to Ξ^{-}π^{+} via Ξ_{c}^{+}→Ξ^{-}π^{+}π^{+} decays based on a 980  fb^{-1} data sample collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} ... ...

    Abstract We report the first observation of the double strange baryon Ξ(1620)^{0} in its decay to Ξ^{-}π^{+} via Ξ_{c}^{+}→Ξ^{-}π^{+}π^{+} decays based on a 980  fb^{-1} data sample collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. The mass and width are measured to be 1610.4±6.0(stat)_{-4.2}^{+6.1} (syst)  MeV/c^{2} and 59.9±4.8(stat)_{-7.1}^{+2.8}(syst)  MeV, respectively. We obtain 4.0σ evidence of the Ξ(1690)^{0} with the same data sample. These results shed light on the structure of hyperon resonances with strangeness S=-2.
    Language English
    Publishing date 2019-03-08
    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.122.072501
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Observation of Transverse Λ/Λ[over ¯] Hyperon Polarization in e^{+}e^{-} Annihilation at Belle.

    Guan, Y / Vossen, A / Adachi, I / Adamczyk, K / Ahn, J K / Aihara, H / Al Said, S / Asner, D M / Atmacan, H / Aulchenko, V / Aushev, T / Ayad, R / Babu, V / Badhrees, I / Bakich, A M / Bansal, V / Behera, P / Beleño, C / Berger, M /
    Bhardwaj, V / Bhuyan, B / Bilka, T / Biswal, J / Bobrov, A / Bonvicini, G / Bozek, A / Bračko, M / Browder, T E / Cao, L / Červenkov, D / Chang, P / Chekelian, V / Chen, A / Cheon, B G / Chilikin, K / Cho, K / Choi, S-K / Choi, Y / Cinabro, D / Cunliffe, S / Dash, N / Di Carlo, S / Dingfelder, J / Doležal, Z / Dong, T V / Drásal, Z / Eidelman, S / Epifanov, D / Fast, J E / Ferber, T / Fulsom, B G / Garg, R / Gaur, V / Gabyshev, N / Garmash, A / Gelb, M / Giri, A / Goldenzweig, P / Golob, B / Guido, E / Haba, J / Hayasaka, K / Hayashii, H / Hirose, S / Hou, W-S / Iijima, T / Inami, K / Inguglia, G / Ishikawa, A / Itoh, R / Iwasaki, M / Iwasaki, Y / Jacobs, W W / Jaegle, I / Jeon, H B / Jia, S / Jin, Y / Joffe, D / Joo, K K / Julius, T / Kang, K H / Kawasaki, T / Kiesling, C / Kim, D Y / Kim, H J / Kim, J B / Kim, K T / Kim, S H / Kinoshita, K / Kodyš, P / Korpar, S / Kotchetkov, D / Križan, P / Kroeger, R / Krokovny, P / Kuhr, T / Kulasiri, R / Kuzmin, A / Kwon, Y-J / Lange, J S / Lee, I S / Lee, S C / Li, L K / Li, Y B / Li Gioi, L / Libby, J / Liventsev, D / Lubej, M / Luo, T / Masuda, M / Matsuda, T / Matvienko, D / Merola, M / Miyata, H / Mizuk, R / Mohanty, G B / Moon, H K / Mori, T / Mussa, R / Nakao, M / Nanut, T / Nath, K J / Natkaniec, Z / Nayak, M / Niiyama, M / Nisar, N K / Nishida, S / Ogawa, S / Okuno, S / Ono, H / Pakhlov, P / Pakhlova, G / Pal, B / Pardi, S / Park, H / Paul, S / Pedlar, T K / Pestotnik, R / Piilonen, L E / Popov, V / Prencipe, E / Rabusov, A / Rostomyan, A / Russo, G / Sahoo, D / Sakai, Y / Salehi, M / Sandilya, S / Santelj, L / Sanuki, T / Savinov, V / Schneider, O / Schnell, G / Schwanda, C / Seidl, R / Seino, Y / Senyo, K / Seon, O / Sevior, M E / Shebalin, V / Shen, C P / Shibata, T-A / Shiu, J-G / Simon, F / Sokolov, A / Solovieva, E / Starič, M / Strube, J F / Sumihama, M / Sumiyoshi, T / Sutcliffe, W / Suzuki, K / Takizawa, M / Tamponi, U / Tanida, K / Tenchini, F / Uchida, M / Uglov, T / Unno, Y / Uno, S / Urquijo, P / Usov, Y / Vahsen, S E / Van Hulse, C / Van Tonder, R / Varner, G / Vinokurova, A / Vorobyev, V / Waheed, E / Wang, B / Wang, C H / Wang, M-Z / Wang, P / Wang, X L / Watanuki, S / Widmann, E / Won, E / Ye, H / Yelton, J / Yin, J H / Yuan, C Z / Yusa, Y / Zhang, Z P / Zhilich, V / Zhukova, V / Zhulanov, V / Zupanc, A

    Physical review letters

    2019  Volume 122, Issue 4, Page(s) 42001

    Abstract: We report the first observation of the spontaneous polarization of Λ and Λ[over ¯] hyperons transverse to the production plane in e^{+}e^{-} annihilation, which is attributed to the effect arising from a polarizing fragmentation function. For inclusive Λ/ ...

    Abstract We report the first observation of the spontaneous polarization of Λ and Λ[over ¯] hyperons transverse to the production plane in e^{+}e^{-} annihilation, which is attributed to the effect arising from a polarizing fragmentation function. For inclusive Λ/Λ[over ¯] production, we also report results with subtracted feed-down contributions from Σ^{0} and charm. This measurement uses a dataset of 800.4  fb^{-1} collected by the Belle experiment at or near a center-of-mass energy of 10.58 GeV. We observe a significant polarization that rises with the fractional energy carried by the Λ/Λ[over ¯] hyperon.
    Language English
    Publishing date 2019-02-28
    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.122.042001
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  7. Article ; Online: Observation of ϒ(2S)→γη_{b}(1S) Decay.

    Fulsom, B G / Pedlar, T K / Adachi, I / Aihara, H / Al Said, S / Asner, D M / Atmacan, H / Aulchenko, V / Aushev, T / Ayad, R / Babu, V / Badhrees, I / Bakich, A M / Bansal, V / Behera, P / Beleño, C / Berger, M / Bhardwaj, V / Bhuyan, B /
    Bilka, T / Biswal, J / Bondar, A / Bonvicini, G / Bozek, A / Bračko, M / Browder, T E / Cao, L / Červenkov, D / Chekelian, V / Chen, A / Cheon, B G / Chilikin, K / Cho, K / Choi, S-K / Choi, Y / Choudhury, S / Cinabro, D / Cunliffe, S / Dash, N / Di Carlo, S / Dingfelder, J / Doležal, Z / Dong, T V / Drásal, Z / Eidelman, S / Epifanov, D / Fast, J E / Ferber, T / Garg, R / Gaur, V / Gabyshev, N / Garmash, A / Gelb, M / Giri, A / Goldenzweig, P / Guido, E / Haba, J / Hayasaka, K / Hayashii, H / Hirose, S / Hou, W-S / Iijima, T / Inami, K / Inguglia, G / Ishikawa, A / Itoh, R / Iwasaki, M / Iwasaki, Y / Jacobs, W W / Jeon, H B / Jia, S / Jin, Y / Joffe, D / Joo, K K / Julius, T / Kawasaki, T / Kichimi, H / Kiesling, C / Kim, D Y / Kim, H J / Kim, J B / Kim, K T / Kim, S H / Kinoshita, K / Kodyš, P / Korpar, S / Kotchetkov, D / Križan, P / Kroeger, R / Krokovny, P / Kuhr, T / Kulasiri, R / Kuzmin, A / Kwon, Y-J / Lange, J S / Lee, I S / Lee, S C / Li, L K / Li, Y B / Li Gioi, L / Libby, J / Liventsev, D / Lubej, M / Luo, T / Masuda, M / Matsuda, T / Matvienko, D / Merola, M / Miyabayashi, K / Miyata, H / Mizuk, R / Mohanty, G B / Moon, H K / Mori, T / Mussa, R / Nakao, M / Nanut, T / Nath, K J / Natkaniec, Z / Nayak, M / Niiyama, M / Nisar, N K / Nishida, S / Ogawa, S / Okuno, S / Ono, H / Pakhlov, P / Pakhlova, G / Pal, B / Pardi, S / Park, H / Paul, S / Pestotnik, R / Piilonen, L E / Popov, V / Prencipe, E / Rabusov, A / Ritter, M / Rostomyan, A / Russo, G / Sakai, Y / Salehi, M / Sandilya, S / Santelj, L / Sanuki, T / Savinov, V / Schneider, O / Schnell, G / Schwanda, C / Seino, Y / Senyo, K / Sevior, M E / Shebalin, V / Shen, C P / Shibata, T-A / Shiu, J-G / Shwartz, B / Simon, F / Singh, J B / Sokolov, A / Solovieva, E / Starič, M / Strube, J F / Sumihama, M / Sumisawa, K / Sumiyoshi, T / Sutcliffe, W / Takizawa, M / Tamponi, U / Tanida, K / Tenchini, F / Uchida, M / Uglov, T / Unno, Y / Uno, S / Urquijo, P / Vahsen, S E / Van Hulse, C / Van Tonder, R / Varner, G / Vinokurova, A / Vorobyev, V / Vossen, A / Wang, B / Wang, C H / Wang, P / Wang, X L / Watanabe, M / Watanuki, S / Widmann, E / Won, E / Ye, H / Yin, J H / Yuan, C Z / Zhang, Z P / Zhilich, V / Zhukova, V / Zhulanov, V / Zupanc, A

    Physical review letters

    2018  Volume 121, Issue 23, Page(s) 232001

    Abstract: We report the observation of ϒ(2S)→γη_{b}(1S) decay based on an analysis of the inclusive photon spectrum of 24.7  fb^{-1} of e^{+}e^{-} collisions at the ϒ(2S) center-of-mass energy collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{ ...

    Abstract We report the observation of ϒ(2S)→γη_{b}(1S) decay based on an analysis of the inclusive photon spectrum of 24.7  fb^{-1} of e^{+}e^{-} collisions at the ϒ(2S) center-of-mass energy collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. We measure a branching fraction of B[ϒ(2S)→γη_{b}(1S)]=(6.1_{-0.7-0.6}^{+0.6+0.9})×10^{-4} and derive an η_{b}(1S) mass of 9394.8_{-3.1-2.7}^{+2.7+4.5}  MeV/c^{2}, where the uncertainties are statistical and systematic, respectively. The significance of our measurement is greater than 7 standard deviations, constituting the first observation of this decay mode.
    Language English
    Publishing date 2018-12-21
    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.121.232001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Observation of ϒ(4S)→η^{'}ϒ(1S).

    Guido, E / Mussa, R / Tamponi, U / Aihara, H / Al Said, S / Asner, D M / Atmacan, H / Aulchenko, V / Aushev, T / Ayad, R / Babu, V / Badhrees, I / Bakich, A M / Bansal, V / Behera, P / Berger, M / Bhardwaj, V / Biswal, J / Bondar, A /
    Bonvicini, G / Bozek, A / Bračko, M / Browder, T E / Červenkov, D / Chekelian, V / Chen, A / Cheon, B G / Chilikin, K / Cho, K / Choi, S-K / Choi, Y / Choudhury, S / Cinabro, D / Cunliffe, S / Di Carlo, S / Doležal, Z / Eidelman, S / Epifanov, D / Fast, J E / Ferber, T / Fulsom, B G / Garg, R / Gaur, V / Gabyshev, N / Garmash, A / Gelb, M / Giri, A / Goldenzweig, P / Haba, J / Hara, T / Hayashii, H / Hedges, M T / Hou, W-S / Inami, K / Inguglia, G / Ishikawa, A / Itoh, R / Iwasaki, M / Iwasaki, Y / Jacobs, W W / Jeon, H B / Jia, S / Jin, Y / Julius, T / Kang, K H / Karyan, G / Kawasaki, T / Kiesling, C / Kim, D Y / Kim, J B / Kim, K T / Kim, S H / Kinoshita, K / Kodyš, P / Korpar, S / Kotchetkov, D / Križan, P / Kroeger, R / Krokovny, P / Kulasiri, R / Kumar, R / Kumita, T / Kuzmin, A / Kwon, Y-J / Lee, I S / Lee, S C / Li, L K / Li, Y B / Li Gioi, L / Libby, J / Liventsev, D / Lubej, M / Luo, T / MacNaughton, J / Masuda, M / Matsuda, T / Matvienko, D / Merola, M / Miyabayashi, K / Miyata, H / Mizuk, R / Mohanty, G B / Moon, H K / Mori, T / Nakano, E / Nakao, M / Nanut, T / Nath, K J / Nayak, M / Niiyama, M / Nishida, S / Ogawa, S / Ono, H / Ostrowicz, W / Pakhlova, G / Pal, B / Pardi, S / Park, C W / Paul, S / Pedlar, T K / Pestotnik, R / Piilonen, L E / Popov, V / Rostomyan, A / Russo, G / Sakai, Y / Salehi, M / Sanuki, T / Schneider, O / Schnell, G / Schwanda, C / Seino, Y / Shebalin, V / Shen, C P / Shibata, T-A / Shiu, J-G / Shwartz, B / Sokolov, A / Starič, M / Strube, J F / Sumihama, M / Sumiyoshi, T / Takizawa, M / Tanida, K / Tenchini, F / Uchida, M / Uglov, T / Unno, Y / Usov, Y / Van Hulse, C / Varner, G / Vinokurova, A / Wang, B / Wang, C H / Wang, M-Z / Wang, P / Wang, X L / Watanabe, M / Watanabe, Y / Widmann, E / Won, E / Ye, H / Yelton, J / Yuan, C Z / Yusa, Y / Zakharov, S / Zhang, Z P / Zhilich, V / Zhukova, V / Zhulanov, V

    Physical review letters

    2018  Volume 121, Issue 6, Page(s) 62001

    Abstract: We report the first observation of the hadronic transition ϒ(4S)→η^{'}ϒ(1S), using 496  fb^{-1} data collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. We reconstruct the η^{'} meson through its ... ...

    Abstract We report the first observation of the hadronic transition ϒ(4S)→η^{'}ϒ(1S), using 496  fb^{-1} data collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. We reconstruct the η^{'} meson through its decays to ρ^{0}γ and to π^{+}π^{-}η, with η→γγ. We measure B(ϒ(4S)→η^{'}ϒ(1S))=[3.43±0.88(stat)±0.21(syst)]×10^{-5}, with a significance of 5.7σ.
    Language English
    Publishing date 2018-08-04
    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.121.062001
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  9. Article ; Online: Observation of an Excited Ω^{-} Baryon.

    Yelton, J / Adachi, I / Ahn, J K / Aihara, H / Al Said, S / Asner, D M / Atmacan, H / Aushev, T / Ayad, R / Babu, V / Badhrees, I / Bahinipati, S / Bakich, A M / Bansal, V / Beleño, C / Berger, M / Bhardwaj, V / Bhuyan, B / Bilka, T /
    Biswal, J / Bondar, A / Bonvicini, G / Bozek, A / Bračko, M / Browder, T E / Červenkov, D / Chekelian, V / Chen, A / Cheon, B G / Chilikin, K / Cho, K / Choi, S-K / Choi, Y / Choudhury, S / Cinabro, D / Cunliffe, S / Czank, T / Dash, N / Di Carlo, S / Doležal, Z / Dong, T V / Drásal, Z / Eidelman, S / Epifanov, D / Fast, J E / Fulsom, B G / Garg, R / Gaur, V / Gabyshev, N / Garmash, A / Gelb, M / Giri, A / Goldenzweig, P / Greenwald, D / Guido, E / Haba, J / Hayasaka, K / Hayashii, H / Hirose, S / Hou, W-S / Inami, K / Inguglia, G / Ishikawa, A / Itoh, R / Iwasaki, M / Iwasaki, Y / Jacobs, W W / Jeon, H B / Jia, S / Jin, Y / Joo, K K / Julius, T / Kaliyar, A B / Kang, K H / Karyan, G / Kato, Y / Kiesling, C / Kim, D Y / Kim, J B / Kim, K T / Kim, S H / Kinoshita, K / Kodyš, P / Korpar, S / Kotchetkov, D / Križan, P / Kroeger, R / Krokovny, P / Kuhr, T / Kumar, R / Kuzmin, A / Kwon, Y-J / Lange, J S / Lee, I S / Lee, S C / Li, L K / Li, Y B / Li Gioi, L / Libby, J / Liventsev, D / Lubej, M / Luo, T / Masuda, M / Matsuda, T / Matvienko, D / McNeil, J T / Merola, M / Miyabayashi, K / Miyata, H / Mizuk, R / Mohanty, G B / Moon, H K / Mori, T / Mussa, R / Nakano, E / Nakao, M / Nanut, T / Nath, K J / Natkaniec, Z / Niiyama, M / Nisar, N K / Nishida, S / Ono, H / Pakhlov, P / Pakhlova, G / Pal, B / Pardi, S / Park, H / Paul, S / Pedlar, T K / Pestotnik, R / Piilonen, L E / Popov, V / Ritter, M / Russo, G / Sahoo, D / Sakai, Y / Sandilya, S / Santelj, L / Sanuki, T / Savinov, V / Schneider, O / Schnell, G / Schwanda, C / Seino, Y / Senyo, K / Sevior, M E / Shebalin, V / Shen, C P / Shibata, T-A / Shiu, J-G / Shwartz, B / Simon, F / Sokolov, A / Solovieva, E / Starič, M / Strube, J F / Sumihama, M / Sumiyoshi, T / Suzuki, K / Takizawa, M / Tamponi, U / Tanida, K / Tao, Y / Tenchini, F / Uchida, M / Uglov, T / Uno, S / Urquijo, P / Usov, Y / Vahsen, S E / Van Hulse, C / Varner, G / Vorobyev, V / Vossen, A / Wang, B / Wang, C H / Wang, M-Z / Wang, P / Wang, X L / Watanabe, M / Watanuki, S / Widmann, E / Won, E / Ye, H / Yuan, C Z / Yusa, Y / Zakharov, S / Zhang, Z P / Zhilich, V / Zhukova, V / Zhulanov, V

    Physical review letters

    2018  Volume 121, Issue 5, Page(s) 52003

    Abstract: Using data recorded with the Belle detector, we observe a new excited hyperon, an Ω^{*-} candidate decaying into Ξ^{0}K^{-} and Ξ^{-}K_{S}^{0} with a mass of 2012.4±0.7(stat)±0.6(syst)  MeV/c^{2} and a width of Γ=6.4_{-2.0}^{+2.5}(stat)±1.6(syst)  MeV. ... ...

    Abstract Using data recorded with the Belle detector, we observe a new excited hyperon, an Ω^{*-} candidate decaying into Ξ^{0}K^{-} and Ξ^{-}K_{S}^{0} with a mass of 2012.4±0.7(stat)±0.6(syst)  MeV/c^{2} and a width of Γ=6.4_{-2.0}^{+2.5}(stat)±1.6(syst)  MeV. The Ω^{*-} is seen primarily in ϒ(1S),ϒ(2S), and ϒ(3S) decays.
    Language English
    Publishing date 2018-08-13
    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.121.052003
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  10. Article ; Online: Search for B^{-}→μ^{-}ν[over ¯]_{μ} Decays at the Belle Experiment.

    Sibidanov, A / Varvell, K E / Adachi, I / Aihara, H / Al Said, S / Asner, D M / Aushev, T / Ayad, R / Babu, V / Badhrees, I / Bahinipati, S / Bakich, A M / Bansal, V / Barberio, E / Behera, P / Bhuyan, B / Biswal, J / Bozek, A / Bračko, M /
    Browder, T E / Červenkov, D / Chang, P / Chekelian, V / Chen, A / Cheon, B G / Chilikin, K / Cho, K / Choi, S-K / Choi, Y / Cinabro, D / Czank, T / Dash, N / Di Carlo, S / Doležal, Z / Drásal, Z / Dutta, D / Eidelman, S / Epifanov, D / Fast, J E / Ferber, T / Fulsom, B G / Gaur, V / Gabyshev, N / Garmash, A / Goldenzweig, P / Greenwald, D / Guan, Y / Guido, E / Haba, J / Hayasaka, K / Hayashii, H / Hedges, M T / Hirose, S / Hou, W-S / Hsu, C-L / Iijima, T / Inami, K / Inguglia, G / Ishikawa, A / Itoh, R / Iwasaki, M / Iwasaki, Y / Jacobs, W W / Jaegle, I / Jeon, H B / Jin, Y / Joo, K K / Julius, T / Kahn, J / Kaliyar, A B / Kang, K H / Karyan, G / Kawasaki, T / Kiesling, C / Kim, D Y / Kim, J B / Kim, S H / Kim, Y J / Kinoshita, K / Kodyš, P / Korpar, S / Kotchetkov, D / Križan, P / Krokovny, P / Kuhr, T / Kulasiri, R / Kumar, R / Kuzmin, A / Kwon, Y-J / Lange, J S / Lee, I S / Li, C H / Li, L / Li Gioi, L / Libby, J / Liventsev, D / Lubej, M / Luo, T / Masuda, M / Matsuda, T / Merola, M / Miyabayashi, K / Miyata, H / Mizuk, R / Mohanty, G B / Moon, H K / Mori, T / Mussa, R / Nakano, E / Nakao, M / Nanut, T / Nath, K J / Natkaniec, Z / Nayak, M / Niiyama, M / Nisar, N K / Nishida, S / Ogawa, S / Okuno, S / Ono, H / Pakhlov, P / Pakhlova, G / Pal, B / Park, C-S / Park, C W / Park, H / Paul, S / Pedlar, T K / Pestotnik, R / Piilonen, L E / Ritter, M / Rostomyan, A / Rozanska, M / Sakai, Y / Salehi, M / Sandilya, S / Sato, Y / Savinov, V / Schneider, O / Schnell, G / Schwanda, C / Seino, Y / Senyo, K / Sevior, M E / Shebalin, V / Shen, C P / Shibata, T-A / Shiu, J-G / Simon, F / Sokolov, A / Solovieva, E / Starič, M / Strube, J F / Stypula, J / Sumihama, M / Sumisawa, K / Sumiyoshi, T / Takizawa, M / Tamponi, U / Tanida, K / Tenchini, F / Trabelsi, K / Uchida, M / Uehara, S / Uglov, T / Unno, Y / Uno, S / Urquijo, P / Van Hulse, C / Varner, G / Vorobyev, V / Wang, C H / Wang, M-Z / Wang, P / Watanabe, M / Watanuki, S / Widmann, E / Won, E / Yamashita, Y / Ye, H / Yelton, J / Yuan, C Z / Yusa, Y / Zhang, Z P / Zhilich, V / Zhukova, V / Zhulanov, V / Zupanc, A

    Physical review letters

    2018  Volume 121, Issue 3, Page(s) 31801

    Abstract: We report the results of a search for the rare, purely leptonic decay B^{-}→μ^{-}ν[over ¯]_{μ} performed with a 711  fb^{-1} data sample that contains 772×10^{6}  BB[over ¯] pairs, collected near the ϒ(4S) resonance with the Belle detector at the KEKB ... ...

    Abstract We report the results of a search for the rare, purely leptonic decay B^{-}→μ^{-}ν[over ¯]_{μ} performed with a 711  fb^{-1} data sample that contains 772×10^{6}  BB[over ¯] pairs, collected near the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. The signal events are selected based on the presence of a high momentum muon and the topology of the rest of the event showing properties of a generic B-meson decay, as well as the missing energy and momentum being consistent with the hypothesis of a neutrino from the signal decay. We find a 2.4 standard deviation excess above background including systematic uncertainties, which corresponds to a branching fraction of B(B^{-}→μ^{-}ν[over ¯]_{μ})=(6.46±2.22±1.60)×10^{-7} or a frequentist 90% confidence level interval on the B^{-}→μ^{-}ν[over ¯]_{μ} branching fraction of [2.9,10.7]×10^{-7}.
    Language English
    Publishing date 2018-07-20
    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.121.031801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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