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  1. Article ; Online: Least-squares fitting of time-domain signals for Fourier transform mass spectrometry.

    Aushev, Tagir / Kozhinov, Anton N / Tsybin, Yury O

    Journal of the American Society for Mass Spectrometry

    2014  Volume 25, Issue 7, Page(s) 1263–1273

    Abstract: To advance Fourier transform mass spectrometry (FTMS)-based molecular structure analysis, corresponding development of the FTMS signal processing methods and instrumentation is required. Here, we demonstrate utility of a least-squares fitting (LSF) ... ...

    Abstract To advance Fourier transform mass spectrometry (FTMS)-based molecular structure analysis, corresponding development of the FTMS signal processing methods and instrumentation is required. Here, we demonstrate utility of a least-squares fitting (LSF) method for analysis of FTMS time-domain (transient) signals. We evaluate the LSF method in the analysis of single- and multiple-component experimental and simulated ion cyclotron resonance (ICR) and Orbitrap FTMS transient signals. Overall, the LSF method allows one to estimate the analytical limits of the conventional instrumentation and signal processing methods in FTMS. Particularly, LSF provides accurate information on initial phases of sinusoidal components in a given transient. For instance, the phase distribution obtained for a statistical set of experimental transients reveals the effect of the first data-point problem in FT-ICR MS. Additionally, LSF might be useful to improve the implementation of the absorption-mode FT spectral representation for FTMS applications. Finally, LSF can find utility in characterization and development of filter-diagonalization method (FDM) MS.
    MeSH term(s) Fourier Analysis ; Least-Squares Analysis ; Mass Spectrometry/methods ; Models, Chemical ; Peptides/chemistry
    Chemical Substances Peptides
    Language English
    Publishing date 2014-05-01
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1073671-2
    ISSN 1879-1123 ; 1044-0305
    ISSN (online) 1879-1123
    ISSN 1044-0305
    DOI 10.1007/s13361-014-0888-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Book ; Online: Measurement of the branching fractions for Cabibbo-suppressed decays $D^{+}\to K^{+} K^{-}\pi^{+}\pi^{0}$ and $D_{(s)}^{+}\to K^{+}\pi^{-}\pi^{+}\pi^{0}$ at Belle

    Belle Collaboration / Li, L. K. / Schwartz, A. J. / Kinoshita, K. / Won, E. / Aihara, H. / Said, S. Al / Asner, D. M. / Atmacan, H. / Aulchenko, V. / Aushev, T. / Ayad, R. / Babu, V. / Bahinipati, S. / Belous, K. / Bennett, J. / Bessner, M. / Bhardwaj, V. / Bilka, T. /
    Bobrov, A. / Bodrov, D. / Bonvicini, G. / Borah, J. / Bozek, A. / Bračko, M. / Branchini, P. / Browder, T. E. / Budano, A. / Campajola, M. / Červenkov, D. / Chang, P. / Chen, A. / Cheon, B. G. / Cho, H. E. / Cho, K. / Cho, S. -J. / Choi, S. -K. / Choi, Y. / Choudhury, S. / Cinabro, D. / Cunliffe, S. / Das, S. / Dash, N. / De Nardo, G. / De Pietro, G. / Dhamija, R. / Di Capua, F. / Doležal, Z. / Dong, T. V. / Dossett, D.

    2022  

    Abstract: We present measurements of the branching fractions for the singly Cabibbo-suppressed decays $D^+\to K^{+}K^{-}\pi^{+}\pi^{0}$ and $D_s^{+}\to K^{+}\pi^{-}\pi^{+}\pi^{0}$, and the doubly Cabibbo-suppressed decay $D^{+}\to K^{+}\pi^{-}\pi^{+}\pi^{0}$, ... ...

    Abstract We present measurements of the branching fractions for the singly Cabibbo-suppressed decays $D^+\to K^{+}K^{-}\pi^{+}\pi^{0}$ and $D_s^{+}\to K^{+}\pi^{-}\pi^{+}\pi^{0}$, and the doubly Cabibbo-suppressed decay $D^{+}\to K^{+}\pi^{-}\pi^{+}\pi^{0}$, based on 980 ${\rm fb}^{-1}$ of data recorded by the Belle experiment at the KEKB $e^{+}e^{-}$ collider. We measure these modes relative to the Cabibbo-favored modes $D^{+}\to K^{-}\pi^{+}\pi^{+}\pi^{0}$ and $D_s^{+}\to K^{+}K^{-}\pi^{+}\pi^{0}$. Our results for the ratios of branching fractions are $B(D^{+}\to K^{+}K^{-}\pi^{+}\pi^{0})/B(D^{+}\to K^{-}\pi^{+}\pi^{+}\pi^{0}) = (11.32 \pm 0.13 \pm 0.26)\%$, $B(D^{+}\to K^{+}\pi^{-}\pi^{+}\pi^{0})/B(D^{+}\to K^{-}\pi^{+}\pi^{+}\pi^{0}) = (1.68 \pm 0.11\pm 0.03)\%$, and $B(D_s^{+}\to K^{+}\pi^{-}\pi^{+}\pi^{0})/B(D_s^{+}\to K^{+}K^{-}\pi^{+}\pi^{0}) = (17.13 \pm 0.62 \pm 0.51)\%$, where the uncertainties are statistical and systematic, respectively. The second value corresponds to $(5.83\pm 0.42)\times\tan^4\theta_C$, where $\theta_C$ is the Cabibbo angle; this value is larger than other measured ratios of branching fractions for a doubly Cabibbo-suppressed charm decay to a Cabibbo-favored decay. Multiplying these results by world average values for $B(D^{+}\to K^{-}\pi^{+}\pi^{+}\pi^{0})$ and $B(D_s^{+}\to K^{+}K^{-}\pi^{+}\pi^{0})$ yields $B(D^{+}\to K^{+}K^{-}\pi^{+}\pi^{0})= (7.08\pm 0.08\pm 0.16\pm 0.20)\times10^{-3}$, $B(D^{+}\to K^{+}\pi^{-}\pi^{+}\pi^{0})= (1.05\pm 0.07\pm 0.02\pm 0.03)\times10^{-3}$, and $B(D_s^{+}\to K^{+}\pi^{-}\pi^{+}\pi^{0}) = (9.44\pm 0.34\pm 0.28\pm 0.32)\times10^{-3}$, where the third uncertainty is due to the branching fraction of the normalization mode. The first two results are consistent with, but more precise than, the current world averages. The last result is the first measurement of this branching fraction.

    Comment: 8 pages, 6 figures, accepted by Phys. Rev. D
    Keywords High Energy Physics - Experiment
    Subject code 612
    Publishing date 2022-05-04
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. 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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  4. 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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  5. Article ; Online: First Simultaneous Determination of Inclusive and Exclusive |V_{ub}|.

    Cao, L / Bernlochner, F / Tackmann, K / Adachi, I / Aihara, H / Al Said, S / Asner, D M / Atmacan, H / Aushev, T / Ayad, R / Babu, V / Bahinipati, S / Banerjee, Sw / Behera, P / Belous, K / Bennett, J / Bessner, M / Bhuyan, B / Bilka, T /
    Biswas, D / Bobrov, A / Bodrov, D / 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 / Cunliffe, S / Das, S / de Marino, G / De Nardo, G / De Pietro, G / Dhamija, R / Di Capua, F / Dingfelder, J / Doležal, Z / Dong, T V / Ferber, T / Ferlewicz, D / Frey, A / Fulsom, B G / Gaur, V / Garmash, A / Giri, A / Goldenzweig, P / Graziani, E / Gu, T / Guan, Y / Gudkova, K / Hadjivasiliou, C / Halder, S / Hara, T / Hartbrich, O / 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 / Jia, S / Jin, Y / Joo, K K / Kalita, D / Kang, K H / Kiesling, C / Kim, C H / Kim, D Y / Kim, K-H / Kim, Y-K / Kinoshita, K / Kodyš, P / Konno, T / Korobov, A / Korpar, S / Kovalenko, E / Križan, P / Krokovny, P / Kuhr, T / Kumar, R / Kumara, K / Kuzmin, A / Kwon, Y-J / Lange, J S / Laurenza, M / Lee, S C / Lewis, P / Li, J / Li, L K / Li, Y / Libby, J / Lin, Y-R / Liventsev, D / Luo, T / Ma, Y / Martini, A / Masuda, M / Matsuda, T / Matvienko, D / Maurya, S K / Meier, F / Merola, M / Metzner, F / Miyabayashi, K / Mizuk, R / Mohanty, G B / Mrvar, M / Mussa, R / Nakamura, I / Nakao, M / Natkaniec, Z / Natochii, A / Nayak, L / Nayak, M / Nisar, N K / Nishida, S / Ogawa, K / Ogawa, S / Ono, H / Oskin, P / Pakhlov, P / Pakhlova, G / Pang, T / Pardi, S / Park, H / Park, J / Park, S-H / Passeri, A / Patra, S / Paul, S / Pedlar, T K / Pestotnik, R / Piilonen, L E / Podobnik, T / Prencipe, E / Prim, M T / Rout, N / Rozanska, M / 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 / Sharma, C / Shen, C P / Shiu, J-G / Shwartz, B / Sokolov, A / Solovieva, E / Starič, M / Stottler, Z S / Sumihama, M / Sutcliffe, W / Takizawa, M / Tamponi, U / Tanida, K / Tenchini, F / Tiwary, R / Trabelsi, K / Uchida, M / Uglov, T / Unno, Y / Uno, K / Uno, S / Ushiroda, Y / Usov, Y / Vahsen, S E / Varner, G / Varvell, K E / Vossen, A / Wang, D / Wang, E / Wang, M-Z / Watanuki, S / Werbycka, O / Won, E / Xu, X / Yabsley, B D / Yan, W / Yang, S B / Yin, J H / Yook, Y / Yusa, Y / Zhang, Z P / Zhilich, V / Zhukova, V

    Physical review letters

    2023  Volume 131, Issue 21, Page(s) 211801

    Abstract: The first simultaneous determination of the absolute value of the Cabibbo-Kobayashi-Maskawa matrix element V_{ub} using inclusive and exclusive decays is performed with the full Belle data set at the ϒ(4S) resonance, corresponding to an integrated ... ...

    Abstract The first simultaneous determination of the absolute value of the Cabibbo-Kobayashi-Maskawa matrix element V_{ub} using inclusive and exclusive decays is performed with the full Belle data set at the ϒ(4S) resonance, corresponding to an integrated luminosity of 711  fb^{-1}. We analyze collision events in which one B meson is fully reconstructed in hadronic modes. This allows for the reconstruction of the hadronic X_{u} system of the semileptonic b→uℓν[over ¯]_{ℓ} decay. We separate exclusive B→πℓν[over ¯]_{ℓ} decays from other inclusive B→X_{u}ℓν[over ¯]_{ℓ} and backgrounds with a two-dimensional fit that utilizes the number of charged pions in the X_{u} system and the four-momentum transfer q^{2} between the B and X_{u} systems. Combining our measurement with information from lattice QCD and QCD calculations of the inclusive partial rate as well as external experimental information on the shape of the B→πℓν[over ¯]_{ℓ} form factor, we determine |V_{ub}^{excl}|=(3.78±0.23±0.16±0.14)×10^{-3} and |V_{ub}^{incl}|=(3.88±0.20±0.31±0.09)×10^{-3}, respectively, with the uncertainties being the statistical error, systematic errors, and theory errors. The ratio of |V_{ub}^{excl}|/|V_{ub}^{incl}|=0.97±0.12 is compatible with unity.
    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.131.211801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: First Measurement of the B^{+}→π^{+}π^{0}π^{0} Branching Fraction and CP Asymmetry.

    Lai, Y-T / Adachi, I / Aihara, H / Al Said, S / Asner, D M / Atmacan, H / Aulchenko, V / Aushev, T / Ayad, R / Babu, V / Bahinipati, S / Behera, P / Belous, K / Bennett, J / Bessner, M / Bhuyan, B / Bilka, T / Bobrov, A / Borah, J /
    Bozek, A / Bračko, M / Branchini, P / Browder, T E / Budano, A / Campajola, M / Červenkov, D / Chang, M-C / Chang, P / Chekelian, V / Chen, A / Cheon, B G / Chilikin, K / Cho, H E / Cho, K / Cho, S-J / Choi, S-K / Choi, Y / Cinabro, D / Cunliffe, S / Czank, T / Das, S / De Nardo, G / De Pietro, G / Dhamija, R / Di Capua, F / Dingfelder, J / Doležal, Z / Dong, T V / Ferber, T / Fulsom, B G / Garg, R / Gaur, V / Gabyshev, N / Giri, A / Goldenzweig, P / Graziani, E / Gu, T / Guan, Y / Gudkova, K / Hadjivasiliou, C / Halder, S / Hartbrich, O / Hayasaka, K / Hayashii, H / Higuchi, T / Hou, W-S / Hsu, C-L / Iijima, T / Inami, K / Ishikawa, A / Itoh, R / Iwasaki, M / Iwasaki, Y / Jacobs, W W / Jang, E-J / Jia, S / Jin, Y / Kaliyar, A B / Kang, K H / Kim, C H / Kim, D Y / Kim, K-H / Kim, Y-K / Kinoshita, K / Kodyš, P / Konno, T / Korobov, A / Korpar, S / Kovalenko, E / Križan, P / Krokovny, P / Kumar, M / Kumar, R / Kumara, K / Kuzmin, A / Kwon, Y-J / Lam, T / Lange, J S / Laurenza, M / Lee, S C / Levit, D / Li, J / Li, L K / Li, Y B / Li Gioi, L / Libby, J / Lieret, K / Liventsev, D / Martini, A / Masuda, M / Matvienko, D / Meier, F / Merola, M / Metzner, F / Mizuk, R / Mohanty, G B / Moon, T J / Mrvar, M / Mussa, R / Nakao, M / Natochii, A / Nayak, L / Nisar, N K / Nishida, S / Ogawa, S / Pakhlova, G / Pang, T / Pardi, S / Park, H / Park, S-H / Passeri, A / Patra, S / Paul, S / Pedlar, T K / Pestotnik, R / Piilonen, L E / Podobnik, T / Prencipe, E / Prim, M T / Rostomyan, A / Rout, N / Russo, G / Sahoo, D / Sakai, Y / Sandilya, S / Sangal, A / Santelj, L / Sanuki, T / Savinov, V / Schnell, G / Schueler, J / Schwanda, C / Seino, Y / Senyo, K / Sevior, M E / Shapkin, M / Sharma, C / Shen, C P / Shiu, J-G / Singh, J B / Sokolov, A / Solovieva, E / Starič, M / Stottler, Z S / Strube, J F / Sumihama, M / Sumisawa, K / Sutcliffe, W / Takizawa, M / Tamponi, U / Tanida, K / Tenchini, F / Trabelsi, K / Uglov, T / Unno, Y / Uno, K / Uno, S / Urquijo, P / van Tonder, R / Varner, G / Varvell, K E / Vinokurova, A / Vossen, A / Waheed, E / Wang, C H / Wang, X L / Watanabe, M / Watanuki, S / Won, E / Yabsley, B D / Yan, W / Yang, S B / Ye, H / Yelton, J / Zhai, Y / Zhang, Z P / Zhilich, V / Zhukova, V

    Physical review letters

    2023  Volume 130, Issue 18, Page(s) 181804

    Abstract: We study B^{+}→π^{+}π^{0}π^{0} using 711  fb^{-1} of data collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. We measure an inclusive branching fraction of (19.0±1.5±1.4)×10^{-6} and an inclusive CP ...

    Abstract We study B^{+}→π^{+}π^{0}π^{0} using 711  fb^{-1} of data collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. We measure an inclusive branching fraction of (19.0±1.5±1.4)×10^{-6} and an inclusive CP asymmetry of (9.2±6.8±0.7)%, where the first uncertainties are statistical and the second are systematic, and a B^{+}→ρ(770)^{+}π^{0} branching fraction of (11.2±1.1±0.9_{-1.6}^{+0.8})×10^{-6}, where the third uncertainty is due to possible interference with B^{+}→ρ(1450)^{+}π^{0}. We present the first observation of a structure around 1  GeV/c^{2} in the π^{0}π^{0} mass spectrum, with a significance of 6.4σ, and measure a branching fraction to be (6.9±0.9±0.6)×10^{-6}. We also report a measurement of local CP asymmetry in this structure.
    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.130.181804
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. 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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  8. 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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  9. Article ; Online: First Observation of Λπ^{+} and Λπ^{-} Signals near the K[over ¯]N(I=1) Mass Threshold in Λ_{c}^{+}→Λπ^{+}π^{+}π^{-} Decay.

    Ma, Y / Yelton, J / Tanida, K / Adachi, I / Ahn, J K / Aihara, H / Al Said, S / Asner, D M / Atmacan, H / Aushev, T / Ayad, R / Babu, V / Bahinipati, S / Banerjee, Sw / Behera, P / Belous, K / Bennett, J / Bessner, M / Bhuyan, B /
    Bilka, T / Biswas, D / Bobrov, A / Bodrov, D / Borah, J / Bozek, A / Bračko, M / Branchini, P / Browder, T E / Budano, A / Campajola, M / Červenkov, D / Chang, M-C / Chen, A / 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 / Garg, R / Gaur, V / Garmash, A / Giri, A / Goldenzweig, P / Golob, B / Graziani, E / Gudkova, K / Hadjivasiliou, C / Halder, S / Hayasaka, K / Hayashii, H / Hedges, M T / Hou, W-S / Hsu, C-L / Inami, K / Ipsita, N / Ishikawa, A / Itoh, R / Iwasaki, M / Jacobs, W W / Jang, E-J / Jia, S / Jin, Y / Kaliyar, A B / Kang, K H / Kawasaki, T / Kiesling, C / Kim, C H / Kim, D Y / Kim, Y-K / Kinoshita, K / Kodyš, P / Korobov, A / Korpar, S / Kovalenko, E / Križan, P / Krokovny, P / Kumar, R / Kumara, K / Kwon, Y-J / Lam, T / Lange, J S / Lee, S C / Lewis, P / Li, L K / Li, Y / Li Gioi, L / Libby, J / Lieret, K / Lin, Y-R / Liventsev, D / Luo, T / Masuda, M / Matsuda, T / Matvienko, D / Maurya, S K / Meier, F / Merola, M / Metzner, F / Miyabayashi, K / Mohanty, G B / Mussa, R / Nakamura, I / Nakano, T / Nakao, M / Natkaniec, Z / Natochii, A / Nayak, L / Nayak, M / Nisar, N K / Nishida, S / Ogawa, S / Ono, H / Oskin, P / Pakhlov, P / Pakhlova, G / Pardi, S / Park, H / Park, J / Patra, S / Paul, S / Pestotnik, R / Piilonen, L E / Podobnik, T / Prencipe, E / Prim, M T / Rostomyan, A / Rout, N / Russo, G / Sandilya, S / Santelj, L / Savinov, V / Schnell, G / Schueler, J / Schwanda, C / Seino, Y / Senyo, K / Sevior, M E / Shan, W / Shapkin, M / Sharma, C / Shen, C P / Shiu, J-G / Simon, F / Sokolov, A / Solovieva, E / Starič, M / Sumihama, M / Sumiyoshi, T / Sutcliffe, W / Takizawa, M / Tamponi, U / Tenchini, F / Uchida, M / Uehara, S / Uglov, T / Unno, Y / Uno, K / Uno, S / Urquijo, P / Usov, Y / Vahsen, S E / van Tonder, R / Varner, G / Vinokurova, A / Vossen, A / Wang, D / Wang, M-Z / Watanabe, M / Watanuki, S / Werbycka, O / Won, E / Xu, X / Yabsley, B D / Yan, W / Yang, S B / Yin, J H / Yuan, C Z / Yuan, L / Zhang, Z P / Zhilich, V / Zhukova, V

    Physical review letters

    2023  Volume 130, Issue 15, Page(s) 151903

    Abstract: Using the data sample of 980  fb^{-1} collected with the Belle detector operating at the KEKB asymmetric-energy e^{+}e^{-} collider, we present the results of an investigation of the Λπ^{+} and Λπ^{-} invariant mass distributions looking for substructure ...

    Abstract Using the data sample of 980  fb^{-1} collected with the Belle detector operating at the KEKB asymmetric-energy e^{+}e^{-} collider, we present the results of an investigation of the Λπ^{+} and Λπ^{-} invariant mass distributions looking for substructure in the decay Λ_{c}^{+}→Λπ^{+}π^{+}π^{-}. We find a significant signal in each mass distribution. When interpreted as resonances, we find for the Λπ^{+} (Λπ^{-}) combination a mass of 1434.3±0.6(stat)±0.9(syst)  MeV/c^{2} [1438.5±0.9(stat)±2.5(syst)  MeV/c^{2}], an intrinsic width of 11.5±2.8(stat)±5.3(syst)  MeV/c^{2} [33.0±7.5(stat)±23.6(syst)  MeV/c^{2}] with a significance of 7.5σ (6.2σ). As these two signals are very close to the K[over ¯]N threshold, we also investigate the possibility of a K[over ¯]N cusp, and find that we cannot discriminate between these two interpretations due to the limited size of the data sample.
    Language English
    Publishing date 2023-04-28
    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.130.151903
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. 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

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