Author: "D. Červenkov" - Searchworks@Jio Institute Digital Library Search Results

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301. Performance studies of the Belle II Silicon Vertex Detector with data taken at the DESY test beam in April 2016

Author: G. B. Mohanty, H. B. Jeon, Noritaka Shimizu, K. Adamczyk, T. Bilka, A. Ishikawa, Takuya Higuchi, Tariq Aziz, S. Bettarini, C. W. Joo, A. Profeti, P. K. Resmi, T. Horiguchi, Benjamin Schwenker, S. Koike, Prafulla Kumar Behera, John Webb, L. Vitale, Z. Natkaniec, P. Mammini, B. Bhuyan, B. Würkner, J. Lettenbichler, J. Libby, Z. Doležal, V. Babu, F. Pilo, M. Ceccanti, S. R. Chendvankar, R. Thalmeier, D. Červenkov, Y. Seino, Takeo Kawasaki, Shoichi Watanuki, T. Yoshinobu, T. Tsuboyama, A. Martini La Licata, U. Stolzenberg, S. N. Mayekar, Corrado Angelini, Masatoshi Maki, H. Yin, G. Caria, W. Ostrowicz, Thomas Bergauer, J. Wiechczynski, K. Hara, F. Bosi, Dipanwita Dutta, K. K. Rao, G. Batignani, P. Kodyč, J. Stypula, G. Casarosa, F. Forti, S. Bacher, H. Aihara, Jun Sasaki, G. Rizzo, L. Lanceri, N. Kambara, Christian Irmler, Ti. Baroncelli, G. N. Taylor, A. Paladino, S. T. Divekar, Phillip Urquijo, H. Park, A. Bozek, F. Buchsteiner, L. Zani, Steven Williams, T. Lück, M. Watanabe, To. Baroncelli, I. Rashevskaya, Hitoshi Yamamoto, T. Kohriki, K. Nakamura, M. M. Kolwalkar, Jakub Kandra, N. Dash, Satoshi Tanaka, A. K. Basith, M. Rozanska, L. Bulla, L. Bosisio, Noriaki K. Sato, Y. Onuki, R. Thomas, T. Morii, W. Kun, E. L. Barberio, Saraju P. Mohanty, S. Uozumi, J. Suzuki, C. Schwanda, Seema Bahinipati, C. La Licata, I. J. Watson, G. De Pietro, Markus Friedl, Peter Kvasnicka, S. Schultschik, Rakesh Kumar, K. H. Kang, A. Bauer, and E. Paoloni
Subjects: Physics, Vertex (computer graphics), belle ii, Silicon, 010308 nuclear & particles physics, vertex detector, Detector, chemistry.chemical_element, DESY, 7. Clean energy, 01 natural sciences, 030218 nuclear medicine & medical imaging, Semiconductor detector, Nuclear physics, silicon vertex detector, 03 medical and health sciences, 0302 clinical medicine, chemistry, Test beam, 0103 physical sciences, Image resolution, silicon detector, Beam (structure)
Abstract: Belle II is a multipurpose detector currently under construction which will be operated at the next generation B-factory SuberKEKB in Japan. Its main devices for the vertex reconstruction are the Silicon Vertex Detector (SVD) and the Pixel Detector (PXD). In April 2016 a sector of the Belle II SVD and PXD have been tested in a beam of high energetic electrons at the test beam facility at DESY Hamburg (Germany). We report here the results for the hit efficiency estimation and the measurement of the resolution for the Belle II silicon vertex etector. We find that the hit efficiencies are on average above 99.5% and that the measured resolution is within the expectations.

302. Machine learning: Hit time finding with a neural network

Author: S. Bacher, H. B. Jeon, A. Ishikawa, W. Ostrowicz, Z. Doležal, H. Park, A. Bozek, Doyen Sahoo, S. Schultschik, M. Kaleta, G. Batignani, Markus Friedl, J. Stypula, M. Ceccanti, N. Kambara, L. Lanceri, B. Bhuyan, A. K. Basith, Prafulla Kumar Behera, A. Paladino, P. Mammini, G. N. Taylor, M. Rozanska, Christian Irmler, Noriaki K. Sato, Jun Sasaki, K. Nakamura, T. Lueck, Filippo Bosi, C. Joo, K. Hara, K. H. Kang, P. K. Resmi, K. K. Rao, T. Bilka, Jakub Kandra, M. Watanabe, Shih-Chang Lee, S. Koike, Mukesh Kumar, H. Aihara, G. Casarosa, Peter Kodys, C. La Licata, J. Suzuki, M. De Nuccio, H. Yin, Steven Williams, L. Bosisio, A. Bauer, I. Rashevskaya, T. Czank, K. Prasanth, L. Zani, Valerio Bertacchi, N. Dash, Tariq Aziz, Jihwa Lee, H. Tanigawa, G. Caria, Rajesh Kumar, J. Libby, F. Forti, T. Kohriki, E. Paoloni, G. B. Mohanty, Seema Bahinipati, Satoshi Tanaka, T. Higuchi, J. C. Webb, L. Vitale, Ti. Baroncelli, Z. Natkaniec, Shoichi Watanuki, F. Buchsteiner, I. J. Watson, T. Tsuboyama, J. Wiechczynski, G. Rizzo, J.A.M. Grimaldo, I. Komarov, B. Gobbo, K. Lalwani, Phillip Urquijo, C. Schwanda, R. Thalmeier, S. N. Mayekar, Peter Kvasnicka, S. Bettarini, Y. Onuki, T. Morii, W. Kun, E. L. Barberio, Agnese Martini, To. Baroncelli, A. Profeti, and D. Červenkov
Subjects: belle ii, Artificial neural network, Event (computing), Computer science, vertex detector, Real-time computing, Signal, silicon vertex detector, Amplitude, High energy accelerator, Field-programmable gate array, silicon detector, Reliability (statistics)
Abstract: At the High Energy Accelerator Research Organization (KEK) in Tsukuba, Japan, the double-sided silicon strip sub-detector of the Belle II experiment is read out by 1748 APV25 chips. FPGAs perform several calculations on the digitized signals. One of them will be "Hit Time Finding": the determination of the time and amplitude of the signal peaks of each event in real time using pre-programmed neural networks. This work analyses the possibility, precision and reliability of these calculations depending on various parameters.

303. Construction and quality assurance of the Belle II silicon vertex detector

Author: Z. Natkaniec, J. Libby, R. Thalmeier, L. Zani, S. N. Mayekar, K. Nakamura, S. Bettarini, Markus Friedl, Gagan Bihari Mohanty, Shoichi Watanuki, H. Tanigawa, Jakub Kandra, Noriaki K. Sato, Tariq Aziz, A. Profeti, Seema Bahinipati, L. Bosisio, Z. Doležal, Christian Irmler, C. La Licata, M. De Nuccio, H. Yin, G. Rizzo, H. B. Jeon, A. Ishikawa, To. Baroncelli, Shih-Chang Lee, J. C. Webb, L. Vitale, H. Aihara, S. Bacher, Phillip Urquijo, T. Czank, A. Paladino, G. N. Taylor, F. Buchsteiner, I. J. Watson, I. Komarov, Doyen Sahoo, H. Park, A. Bozek, G. Batignani, Jihwa Lee, Y. B. Li, J.A.M. Grimaldo, J. Stypula, G. Casarosa, T. Kohriki, Y. Onuki, B. Gobbo, B. Bhuyan, K. Lalwani, C. Schwanda, K. H. Kang, Ti. Baroncelli, T. Morii, Agnese Martini, Toru Tsuboyama, P. K. Resmi, C. Joo, Valerio Bertacchi, Mukesh Kumar, Peter Kodys, E. L. Barberio, Peter Kvasnicka, A. Bauer, Steven Williams, S. Schultschik, D. Červenkov, K. Hara, T. Lueck, J. Wiechczynski, Rajesh Kumar, E. Paoloni, A. K. Basith, J. Suzuki, I. Rashevskaya, Satoshi Tanaka, M. Rozanska, M. Kaleta, P. Mammini, M. Ceccanti, T. Higuchi, Jun Sasaki, K. Prasanth, G. Caria, K. Wan, Filippo Bosi, Prafulla Kumar Behera, T. Bilka, M. Watanabe, W. Ostrowicz, L. Lanceri, N. Dash, F. Forti, and K. K. Rao
Subjects: Physics, Particle physics, Luminosity (scattering theory), Interaction point, Pixel, Physics::Instrumentation and Detectors, business.industry, vertex detector, Detector, law.invention, silicon vertex detector, law, visual_art, Electronic component, visual_art.visual_art_medium, Belle II, CP violation, silicon detector, High Energy Physics::Experiment, business, Collider, Quality assurance
Abstract: The Belle II experiment, which is situated at the interaction point of the SuperKEKB e+e− collider at KEK, Tsukuba, Japan, is expected to collect data corresponding to an integrated luminosity of 50 ab−1. This data set will be sensitive to beyond-the-standard-model physics via precision measurements and searches for very rare decays. At its heart lies a six-layer vertex detector consisting of two layers of pixel detectors (PXD) and four layers of double-sided silicon microstrip detectors (SVD). Precise vertexing as provided by this device is essential for measurements of time-dependent CP violation. Crucial aspects of the SVD assembly are precise alignment, as well as rigorous electrical and geometrical quality assurance. We present an overview of the construction of the SVD, including the precision gluing of SVD component modules and the wire-bonding of various electrical components. We also discuss the electrical and geometrical quality assurance tests.

304. The software framework of the Belle II silicon vertex detector and its development for the 2016 test-beam at desy

Author: N. Kambara, A. Paladino, Z. Doležal, Prafulla Kumar Behera, M. Watanabe, S. T. Divekar, C. W. Joo, Phillip Urquijo, To. Baroncelli, I. Rashevskaya, K. Nakamura, H. B. Jeon, S. Koike, Fabrizio Giulio Luca Pilo, P. K. Resmi, Jakub Kandra, A. Ishikawa, Z. Natkaniec, L. Bosisio, John Webb, T. Yoshinobu, L. Vitale, Masatoshi Maki, N. Dash, S. Bettarini, S. R. Chendvankar, H. Yin, A. K. Basith, Saraju P. Mohanty, S. Uozumi, T. Horiguchi, R. Thalmeier, D. Červenkov, M. Rozanska, L. Zani, J. Lettenbicher, Jun Sasaki, Rakesh Kumar, B. Würkner, K. H. Kang, Noritaka Shimizu, C. Schwanda, K. K. Rao, F. Forti, W. Ostrowicz, S. N. Mayekar, J. Libby, S. Bacher, K. Adamczyk, C. La Licata, A. Profeti, H. Park, A. Bozek, I. J. Watson, Y. Seino, G. Batignani, J. Stypula, A. Bauer, P. Mammini, Takeo Kawasaki, Shoichi Watanuki, B. Bhuyan, G. De Pietro, E. Paoloni, Thomas Bergauer, Takuya Higuchi, L. Lanceri, K. Hara, H. Aihara, Hitoshi Yamamoto, Y. Onuki, G. Rizzo, R. Thomas, T. Morii, W. Kun, E. L. Barberio, G. B. Mohanty, G. N. Taylor, Filippo Bosi, T. Bilka, Tariq Aziz, S. Schultschik, M. M. Kolwalkar, T. Tsuboyama, Seema Bahinipati, J. Wiechczynski, Corrado Angelini, Peter Kvasnicka, Dipanwita Dutta, G. Caria, Steven Williams, J. Suzuki, M. Ceccanti, V. Babu, T. Kohriki, L. Bulla, Satoshi Tanaka, Christian Irmler, Markus Friedl, Ti. Baroncelli, T. Lueck, G. Casarosa, F. Buchsteiner, Noriaki K. Sato, and P. Kodyč
Subjects: Physics, belle ii, silicon detector, vertex detector, silicon vertex detector, Particle physics, Multidisciplinary, Meson, business.industry, Detector, DESY, computer.software_genre, law.invention, Software framework, Nuclear physics, Software, KEKB, law, CP violation, High Energy Physics::Experiment, Collider, business, computer
Abstract: The Silicon Vertex Detector of Belle II will be fundamental not only for the reconstruction of B meson vertices, but also for the reconstruction of neutral particles like K shorts, and the tracking of low-pt particles like slow pions associated with the decays of the abundant D* mesons. As a consequence great importance is given to the performance of the software that deals with the simulation and reconstruction of the SVD events. The Belle II experiment is the successor to Belle, one of the two experiments that first observed CP violation in the decay of B mesons. The SuperKEKB collider will deliver 40 times more luminosity than its predecessor KEKB, which requires major upgrades to the detector hardware. This also poses new challenges not only for the data collection and storage, but also for the software framework which is used to process and analyse the experimental data. In this article we present in detail the SVD software framework together with its development for the test of the Vertex Detector system, which took place at DESY in April 2016 using an electron beam.

305. Electronics and firmware of the belle II silicon vertex detector readout system

Author: L. Lanceri, G. Batignani, J. Stypula, S. Uozumi, C. Joo, N. Kambara, Shih-Chang Lee, F. Buchsteiner, I. J. Watson, A. Paladino, B. Gobbo, C. Schwanda, Prafulla Kumar Behera, Y. Onuki, G. B. Mohanty, R. Thomas, T. Morii, W. Kun, E. L. Barberio, T. Horiguchi, I. Komarov, H. Park, S. Schultschik, Satoshi Tanaka, H. B. Jeon, A. Ishikawa, S. Bettarini, R. Thalmeier, H. Yamamoto, A. K. Basith, B. Bhuyan, Rahul Kumar, T. Yoshinobu, G. Caria, Z. Doležal, M. Rozanska, S. N. Mayekar, Ti. Baroncelli, Fabrizio Giulio Luca Pilo, Masatoshi Maki, Noriaki K. Sato, G. De Pietro, Thomas Bergauer, Steven Williams, T. Kawasaki, Jun Sasaki, L. Zanii, V. Babu, Tariq Aziz, J. C. Webb, Markus Friedl, K. Hara, N. Dash, F. Forti, K. Nakamura, Seema Bahinipati, Filippo Bosi, L. Vitale, S. Bacher, Jakub Kandra, T. Bilka, P. K. Resmi, M. Watanabe, Chiara La Licata, G. Rizzo, Dipanwita Dutta, L. Bosisio, A. Bozek, To. Baroncelli, K. H. Kang, N. Shimizu, Z. Natkaniec, Giulia Casarosa, S. Koike, Peter Kodys, J. Suzuki, Soumya D. Mohanty, I. Rashevskaya, B. Würkner, S. T. Divekar, A. Bauer, J. Libby, Phillip Urquijo, T. Tsuboyama, J. Wiechczynski, Corrado Angelini, Y. Seino, Agnese Martini, E. Paoloni, G. N. Taylor, Shoichi Watanuki, P. Mammini, T. Kohriki, J. Lettenbichler, Christian Irmler, T. Higuchi, L. Bulla, D. Červenkov, M. Ceccanti, A. Profeti, Peter Kvasnicka, K. Adamczyk, H. Yin, T. Lueck, H. Aihara, S. R. Chendvankar, K. K. Rao, M. M. Kolwalkar, and W. Ostrowicz
Subjects: Physics, belle ii, Finite impulse response, Physics::Instrumentation and Detectors, business.industry, Firmware, vertex detector, Electrical engineering, computer.software_genre, Signal, silicon vertex detector, Analog signal, Common-mode signal, Line (text file), business, Field-programmable gate array, computer, Zero suppression, silicon detector
Abstract: The Silicon Vertex Detector of the Belle II Experiment at KEK in Tsukuba, Japan, consists of 172 double-sided strip sensors. They are read out by 1748 APV25 chips, and the analog data are sent out of the radiation zone to 48 modules which convert them to digital. FPGAs then compensate line signal distortions using digital finite impulse response filters and detect data frames from the incoming stream. Then they perform pedestal subtraction, common mode correction and zero suppression, as well as calculate the peak timing and amplitude of each event from a set of data samples using a neural network.

306. Performance of the Belle II silicon vertex detector

Author: H. Tanigawa, K. Adamczyk, H. Aihara, T. Aziz, S. Bacher, S. Bahinipati, G. Batignani, J. Baudot, P.K. Behera, S. Bettarini, T. Bilka, A. Bozek, F. Buchsteiner, G. Casarosa, D. Červenkov, Y.Q. Chen, L. Corona, T. Czank, S.B. Das, N. Dash, G. de Marino, Z. Doležal, G. Dujany, F. Forti, M. Friedl, E. Ganiev, B. Gobbo, S. Halder, K. Hara, S. Hazra, T. Higuchi, C. Irmler, A. Ishikawa, H.B. Jeon, C. Joo, M. Kaleta, A.B. Kaliyar, J. Kandra, K.H. Kang, P. Kapusta, P. Kodyš, T. Kohriki, M. Kumar, R. Kumar, P. Kvasnička, C. La Licata, K. Lalwani, L. Lanceri, S.C. Lee, Y.B. Li, J. Libby, T. Lueck, S. Maity, S.N. Mayekar, G.B. Mohanty, J.A. Mora Grimaldo, T. Morii, K.R. Nakamura, Z. Natkaniec, Y. Onuki, W. Ostrowicz, A. Paladino, E. Paoloni, H. Park, K.K. Rao, I. Ripp-Baudot, G. Rizzo, N. Rout, D. Sahoo, N. Sato, C. Schwanda, J. Suzuki, S. Tanaka, R. Thalmeier, T. Tsuboyama, Y. Uematsu, O. Verbycka, L. Vitale, K. Wan, S. Watanuki, J. Webb, J. Wiechczynski, H. Yin, L. Zani, T. Zhang, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Belle-II, Belle-II SVD, Tanigawa, H., Adamczyk, K., Aihara, H., Aziz, T., Bacher, S., Bahinipati, S., Batignani, G., Baudot, J., Behera, P. K., Bettarini, S., Bilka, T., Bozek, A., Buchsteiner, F., Casarosa, G., Cervenkov, D., Chen, Y. Q., Corona, L., Czank, T., Das, S. B., Dash, N., de Marino, G., Dolezal, Z., Dujany, G., Forti, F., Friedl, M., Ganiev, E., Gobbo, B., Halder, S., Hara, K., Hazra, S., Higuchi, T., Irmler, C., Ishikawa, A., Jeon, H. B., Joo, C., Kaleta, M., Kaliyar, A. B., Kandra, J., Kang, K. H., Kapusta, P., Kodys, P., Kohriki, T., Kumar, M., Kumar, R., Kvasnicka, P., La Licata, C., Lalwani, K., Lanceri, L., Lee, S. C., Li, Y. B., Libby, J., Lueck, T., Maity, S., Mayekar, S. N., Mohanty, G. B., Grimaldo, J. A. M., Morii, T., Nakamura, K. R., Natkaniec, Z., Onuki, Y., Ostrowicz, W., Paladino, A., Paoloni, E., Park, H., Rao, K. K., Ripp-Baudot, I., Rizzo, G., Rout, N., Sahoo, D., Sato, N., Schwanda, C., Suzuki, J., Tanaka, S., Thalmeier, R., Tsuboyama, T., Uematsu, Y., Verbycka, O., Vitale, L., Wan, K., Watanuki, S., Webb, J., Wiechczynski, J., Yin, H., Zani, L., and Zhang, T.
Subjects: Vertex (graph theory), Nuclear and High Energy Physics, Particle physics, Matching (graph theory), Performance, vertex detector, BELLE, fabrication, 01 natural sciences, 7. Clean energy, Noise (electronics), Silicon vertex detector, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, semiconductor detector: pixel, 0103 physical sciences, Singular value decomposition, Belle II, vertex detector: design, Silicon Vertex Detector, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Instrumentation, activity report, Physics, 010308 nuclear & particles physics, Resolution (electron density), Detector, Belle experiment, Vertex (geometry), semiconductor detector: microstrip, Vertex detector, Impact parameter, SVD, performance, semiconductor detector: design, experimental results
Abstract: The Belle II experiment at the SuperKEKB collider of KEK (Japan) started recording physics data in spring 2019 with all its subdetectors installed and with the goal of accumulating 50ab−1 of e+e− collision events at the unprecedented instantaneous luminosity of 8×1035cm−2s−1, about 40 times larger than its predecessor. The Belle II vertex detector plays a crucial role in the broad Belle II physics program, especially for time-dependent CP measurements. It consists of two layers of DEPFET-based pixels and four layers of double-sided silicon strip detectors (SVD). The experience gained from the first period of SVD operation can be summarized as smooth and reliable running of the detector, with high stability of noise levels and calibration parameters obtained from local calibration runs. No major problem has been experienced. The detector even survived a few serious radiation accidents in which the beam was lost due to failure in the machine focusing quadrupoles without any notable damage. The SVD performance were carefully studied with these first physics data. The SVD showed excellent hit and tracking efficiency. Moreover, cluster energy and signal to noise ratio as well as the hit time and spatial resolutions measured on data showed a fair agreement with the expected performance.

307. Measurement of Angular Coefficients of B[over ¯]→D^{*}ℓν[over ¯]_{ℓ}: Implications for |V_{cb}| and Tests of Lepton Flavor Universality.

Author: Prim MT, Bernlochner F, Metzner F, Aihara H, Asner DM, Aushev T, Ayad R, Babu V, Banerjee S, Behera P, Belous K, Bennett J, Bessner M, Bhardwaj V, Bhuyan B, Bilka T, Biswas D, Bodrov D, Bondar A, Borah J, Bračko M, Branchini P, Browder TE, Budano A, Campajola M, Cao L, Červenkov D, Chang P, Cheon BG, Choi SK, Choi Y, Choudhury S, Cochran J, Das S, Dash N, De Nardo G, De Pietro G, Dhamija R, Di Capua F, Doležal Z, Dong TV, Dubey S, Ecker P, Epifanov D, Ferber T, Ferlewicz D, Fulsom BG, Garg R, Gaur V, Giri A, Goldenzweig P, Gu T, Gudkova K, Hadjivasiliou C, Hara T, Hayashii H, Hazra S, Hedges MT, Herrmann D, Hernández Villanueva M, Hou WS, Hsu CL, Inami K, Inguglia G, Ipsita N, Ishikawa A, Itoh R, Iwasaki M, Jacobs WW, Kiesling C, Kim CH, Kim DY, Kim KH, Kodyš P, Konno T, Korobov A, Korpar S, Kovalenko E, Križan P, Krokovny P, Kuhr T, Kumar M, Kumar R, Kwon YJ, Lam T, Lee SC, Lewis P, Li LK, Li Gioi L, Libby J, Liventsev D, Ma Y, Matsuda T, Matvienko D, Maurya SK, Meier F, Merola M, Miyabayashi K, Mizuk R, Mohanty GB, Nakamura I, Nakao M, Narwal D, Natkaniec Z, Natochii A, Nayak L, Nishida S, Ono H, Oskin P, Pakhlov P, Pakhlova G, Park SH, Passeri A, Patra S, Pedlar TK, Pestotnik R, Piilonen LE, Podobnik T, Prencipe E, Röhrken M, Rout N, Russo G, Sandilya S, Santelj L, Savinov V, Schmolz P, Schnell G, Schwanda C, Seino Y, Senyo K, Shan W, Shiu JG, Singh JB, Solovieva E, Starič M, Stottler ZS, Sumihama M, Takizawa M, Tanida K, Tenchini F, Tiwary R, Trabelsi K, Unno Y, Uno S, Urquijo P, Usov Y, Vahsen SE, Varvell KE, Vossen A, Wang MZ, Wang XL, Won E, Yabsley BD, Yan W, Yang SB, Yin JH, Yuan L, Zhang ZP, Zhilich V, and Zhukova V
Abstract: We measure the complete set of angular coefficients J_{i} for exclusive B[over ¯]→D^{*}ℓν[over ¯]_{ℓ} decays (ℓ=e, μ). Our analysis uses the full 711 fb^{-1} Belle dataset with hadronic tag-side reconstruction. The results allow us to extract the form factors describing the B[over ¯]→D^{*} transition and the Cabibbo-Kobayashi-Maskawa matrix element |V_{cb}|. Using recent lattice QCD calculations for the hadronic form factors, we find |V_{cb}|=(40.7±0.7)×10^{-3} using the Boyd-Grinstein-Lebed parametrization, compatible with determinations from inclusive semileptonic decays. We search for lepton flavor universality violation as a function of the hadronic recoil parameter w and investigate the differences of the electron and muon angular distributions. We find no deviation from standard model expectations.
Published: 2024
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308. Measurements of the Branching Fraction, Polarization, and CP Asymmetry for the Decay B^{0}→ωω.

Author: Guan Y, Schwartz AJ, Kinoshita K, Adachi I, Aihara H, Al Said S, Asner DM, Atmacan H, Ayad R, Bahinipati S, Banerjee S, Belous K, Bennett J, Bessner M, Bhardwaj V, Bhuyan B, Biswas D, Bobrov A, Bodrov D, Borah J, Bozek A, Bračko M, Branchini P, Browder TE, Budano A, Campajola M, Cao L, Červenkov D, Chang MC, Chang P, Cheon BG, Chilikin K, Cho HE, Cho K, Choi SK, Choi Y, Choudhury S, Das S, De Nardo G, De Pietro G, Dhamija R, Di Capua F, Dingfelder J, Doležal Z, Dong TV, Dubey S, Ecker P, Epifanov D, Ferber T, Ferlewicz D, Fulsom BG, Gaur V, Giri A, Goldenzweig P, Graziani E, Gu T, Gudkova K, Hadjivasiliou C, Hayasaka K, Hayashii H, Hazra S, Hedges MT, Hou WS, Hsu CL, Ipsita N, Ishikawa A, Itoh R, Iwasaki M, Jacobs WW, Jia S, Jin Y, Joo KK, Kawasaki T, Kim CH, Kim DY, Kim KH, Kim YJ, Kim YK, Kodyš P, Korobov A, Korpar S, Kovalenko E, Križan P, Krokovny P, Kuhr T, Kumar R, Kumara K, Kumita T, Kwon YJ, Lai YT, Lee SC, Levit D, Li LK, Li Y, Li YB, Li Gioi L, Libby J, Liventsev D, Luo T, Masuda M, Matsuda T, Maurya SK, Meier F, Merola M, Metzner F, Miyabayashi K, Mizuk R, Mohanty GB, Mussa R, Nakamura I, Nakao M, Natkaniec Z, Natochii A, Nayak L, Nayak M, Niiyama M, Nishida S, Ogawa S, Ono H, Pakhlova G, Pardi S, Park H, Park J, Park SH, Paul S, Pestotnik R, Piilonen LE, Podobnik T, Prencipe E, Prim MT, Röhrken M, Russo G, Sandilya S, Santelj L, Savinov V, Schnell G, Schwanda C, Seino Y, Senyo K, Sevior ME, Shan W, Shiu JG, Solovieva E, Starič M, Sumisawa K, Takizawa M, Tamponi U, Tanida K, Tenchini F, Tiwary R, Trabelsi K, Uchida M, Unno Y, Uno S, Urquijo P, Usov Y, Vahsen SE, Varvell KE, Vinokurova A, Wang MZ, Watanuki S, Won E, Xu X, Yabsley BD, Yan W, Yook Y, Yuan L, Zhang ZP, Zhilich V, and Zhukova V
Abstract: We present a comprehensive study of B^{0}→ωω decays using 772×10^{6} BB[over ¯] pairs collected with the Belle detector at the KEKB e^{+}e^{-} collider. This process is a suppressed charmless decay into two vector mesons and can exhibit interesting polarization and CP violation. The decay is observed for the first time with a significance of 7.9 standard deviations. We measure a branching fraction B=(1.53±0.29±0.17)×10^{-6}, a fraction of longitudinal polarization f_{L}=0.87±0.13±0.13, and a time-integrated CP asymmetry A_{CP}=-0.44±0.43±0.11, where the first uncertainties listed are statistical and the second are systematic. This is the first observation of B^{0}→ωω and the first measurements of f_{L} and A_{CP} for this decay.
Published: 2024
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309. Search for Baryon-Number-Violating Processes in B^{-} Decays to the Ξ[over ¯]_{c}^{0}Λ[over ¯]_{c}^{-} Final State.

Author: Gu T, Savinov V, Adachi I, Aihara H, Asner DM, Atmacan H, Aushev T, Ayad R, Banerjee S, Belous K, Bennett J, Bessner M, Bhardwaj V, Bhuyan B, Biswas D, Bobrov A, Bodrov D, Borah J, Bozek A, Bračko M, Branchini P, Browder TE, Budano A, Campajola M, Červenkov D, Chang MC, Chang P, Cheon BG, Chilikin K, Cho K, Choi SK, Choi Y, Choudhury S, Das S, De Nardo G, De Pietro G, Dhamija R, Di Capua F, Dingfelder J, Doležal Z, Dong TV, Dubey S, Ecker P, Ferber T, Ferlewicz D, Fulsom BG, Gaur V, Giri A, Goldenzweig P, Graziani E, Guan Y, Gudkova K, Hadjivasiliou C, Hayasaka K, Hayashii H, Hedges MT, Herrmann D, Hou WS, Hsu CL, Ipsita N, Ishikawa A, Itoh R, Iwasaki M, Jacobs WW, Jia S, Jin Y, Joo KK, Kawasaki T, Kiesling C, Kim CH, Kim DY, Kim KH, Kim YJ, Kodyš P, Korobov A, Korpar S, Kovalenko E, Križan P, Krokovny P, Kuhr T, Kumara K, Kumita T, Kwon YJ, Lai YT, Lee SC, Levit D, Li LK, Li YB, Li Gioi L, Liventsev D, Masuda M, Matsuda T, Maurya SK, Meier F, Merola M, Metzner F, Miyabayashi K, Mizuk R, Mohanty GB, Mussa R, Nakamura I, Nakao M, Natkaniec Z, Natochii A, Nayak L, Nayak M, Niiyama M, Nishida S, Ogawa S, Pakhlova G, Pardi S, Park H, Park J, Park SH, Passeri A, Patra S, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Podobnik T, Prencipe E, Prim MT, Röhrken M, Russo G, Sandilya S, Santelj L, Schnell G, Schwanda C, Seino Y, Senyo K, Sevior ME, Shan W, Sharma C, Shiu JG, Solovieva E, Starič M, Takizawa M, Tamponi U, Tanida K, Tenchini F, Tiwary R, Trabelsi K, Uchida M, Unno Y, Uno S, Usov Y, Vahsen SE, Varvell KE, Vinokurova A, Wang E, Wang MZ, Wang XL, Watanuki S, Won E, Xu X, Yabsley BD, Yan W, Yang SB, Yuan L, Zhang ZP, Zhilich V, and Zhukova V
Abstract: We report the results of the first search for B^{-} decays to the Ξ[over ¯]_{c}^{0}Λ[over ¯]_{c}^{-} final state using 711 fb^{-1} of data collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. The results are interpreted in terms of both direct baryon-number-violating B^{-} decay and Ξ_{c}^{0}-Ξ[over ¯]_{c}^{0} oscillations which follow the standard model decay B^{-}→Ξ_{c}^{0}Λ[over ¯]_{c}^{-}. We observe no evidence for baryon number violation and set the 95% confidence-level upper limits on the ratio of baryon-number-violating and standard model branching fractions B(B^{-}→Ξ[over ¯]_{c}^{0}Λ[over ¯]_{c}^{-})/B(B^{-}→Ξ_{c}^{0}Λ[over ¯]_{c}^{-}) to be <2.7% and on the effective angular frequency of mixing ω in Ξ_{c}^{0}-Ξ[over ¯]_{c}^{0} oscillations to be <0.76 ps^{-1} (equivalent to τ_{mix}>1.3 ps).
Published: 2024
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310. Search for a Heavy Neutrino in τ Decays at Belle.

Author: Liventsev D, Adachi I, Aihara H, Al Said S, Asner DM, Atmacan H, Ayad R, Babu V, Banerjee S, Bauer M, Behera P, Belous K, Bennett J, Bessner M, Bilka T, Biswas D, Bodrov D, Bonvicini G, Borah J, Bozek A, Bračko M, Branchini P, Browder TE, Budano A, Campajola M, Červenkov D, Chang MC, Chen A, Cheon BG, Cho HE, Cho K, Cho SJ, Choi SK, Choi Y, Choudhury S, Cinabro D, Das S, De Nardo G, De Pietro G, Dhamija R, Di Capua F, Doležal Z, Dong TV, Dossett D, Epifanov D, Ferber T, Ferlewicz D, Fulsom BG, Garg R, Gaur V, Giri A, Goldenzweig P, Graziani E, Gu T, Gudkova K, Hadjivasiliou C, Han X, Hara T, Hayasaka K, Hayashii H, Hedges MT, Herrmann D, Hernández Villanueva M, Hsu CL, Inami K, Ipsita N, Ishikawa A, Itoh R, Iwasaki M, Jacobs WW, Jang EJ, Jia S, Jin Y, Kaliyar AB, Kang KH, Kawasaki T, Kiesling C, Kim CH, Kim DY, Kim KH, Kim YK, Kodyš P, Korobov A, Korpar S, Kovalenko E, Križan P, Krokovny P, Kumar M, Kumar R, Kumara K, Kwon YJ, Lam T, Lange JS, Lee SC, Lewis P, Li LK, Li Y, Li Gioi L, Libby J, Lieret K, Lin YR, Luo T, Matsuda T, Matvienko D, Meier F, Merola M, Metzner F, Miyabayashi K, Mizuk R, Mohanty GB, Mussa R, Nakamura I, Nakano T, Nakao M, Natkaniec Z, Natochii A, Nayak L, Nayak M, Nisar NK, Nishida S, Ogawa S, Ono H, Oskin P, Pakhlov P, Pakhlova G, Pardi S, Park H, Park J, Passeri A, Patra S, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Podobnik T, Prencipe E, Prim MT, Rostomyan A, Rout N, Russo G, Sandilya S, Sangal A, Santelj L, Savinov V, Schnell G, Schueler J, Schwanda C, Seino Y, Senyo K, Sevior ME, Shapkin M, Sharma C, Shen CP, Shiu JG, Shwartz B, Simon F, Sokolov A, Solovieva E, Starič M, Sumihama M, Sumiyoshi T, Sutcliffe W, Takizawa M, Tamponi U, Tanida K, Tenchini F, Uchida M, Uehara S, Uno S, Usov Y, van Tonder R, Varner G, Varvell KE, Vinokurova A, Wang MZ, Wang XL, Watanabe M, Watanuki S, Werbycka O, Won E, Xu X, Yabsley BD, Yan W, Yang SB, Yelton J, Yin JH, Yuan CZ, Yuan L, Zhang ZP, Zhilich V, and Zhukova V
Abstract: We report on a search for a heavy Majorana neutrino in the decays τ^{-}→π^{-}ν_{h}, ν_{h}→π^{±}ℓ^{∓}, ℓ=e, μ. The results are obtained using the full data sample of 988 fb^{-1} collected with the Belle detector at the KEKB asymmetric energy e^{+}e^{-} collider, which contains 912×10^{6} ττ pairs. We observe no significant signal and set 95% CL upper limits on the couplings of the heavy right-handed neutrinos to the conventional standard model left-handed neutrinos in the mass range 0.2-1.6 GeV/c^{2}. This is the first study of a mixed couplings of heavy neutrinos to τ leptons and light-flavor leptons.
Published: 2023
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311. First Simultaneous Determination of Inclusive and Exclusive |V_{ub}|.

Author: Cao L, Bernlochner F, Tackmann K, Adachi I, Aihara H, Al Said S, Asner DM, Atmacan H, Aushev T, Ayad R, Babu V, Bahinipati S, Banerjee S, 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 TE, Budano A, Campajola M, Červenkov D, Chang MC, Cheon BG, Chilikin K, Cho HE, Cho K, Cho SJ, Choi SK, 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 TV, Ferber T, Ferlewicz D, Frey A, Fulsom BG, 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 MT, Herrmann D, Hou WS, Hsu CL, Iijima T, Inami K, Ipsita N, Ishikawa A, Itoh R, Iwasaki M, Jacobs WW, Jang EJ, Jia S, Jin Y, Joo KK, Kalita D, Kang KH, Kiesling C, Kim CH, Kim DY, Kim KH, Kim YK, 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 YJ, Lange JS, Laurenza M, Lee SC, Lewis P, Li J, Li LK, Li Y, Libby J, Lin YR, Liventsev D, Luo T, Ma Y, Martini A, Masuda M, Matsuda T, Matvienko D, Maurya SK, Meier F, Merola M, Metzner F, Miyabayashi K, Mizuk R, Mohanty GB, Mrvar M, Mussa R, Nakamura I, Nakao M, Natkaniec Z, Natochii A, Nayak L, Nayak M, Nisar NK, Nishida S, Ogawa K, Ogawa S, Ono H, Oskin P, Pakhlov P, Pakhlova G, Pang T, Pardi S, Park H, Park J, Park SH, Passeri A, Patra S, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Podobnik T, Prencipe E, Prim MT, Rout N, Rozanska M, Russo G, Sandilya S, Sangal A, Santelj L, Savinov V, Schnell G, Schwanda C, Seino Y, Senyo K, Sevior ME, Shan W, Shapkin M, Sharma C, Shen CP, Shiu JG, Shwartz B, Sokolov A, Solovieva E, Starič M, Stottler ZS, 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 SE, Varner G, Varvell KE, Vossen A, Wang D, Wang E, Wang MZ, Watanuki S, Werbycka O, Won E, Xu X, Yabsley BD, Yan W, Yang SB, Yin JH, Yook Y, Yusa Y, Zhang ZP, Zhilich V, and Zhukova V
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.
Published: 2023
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312. First Measurement of the Michel Parameter ξ^{'} in the τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} Decay at Belle.

Author: Bodrov D, Pakhlov P, Adachi I, Aihara H, Said SA, Asner DM, Atmacan H, Aushev T, Ayad R, Babu V, Banerjee S, 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 TE, Budano A, Campajola M, Červenkov D, Chang MC, Cheon BG, Chilikin K, Cho HE, Cho K, Cho SJ, Choi SK, Choi Y, Choudhury S, Cinabro D, Das S, De Nardo G, De Pietro G, Dhamija R, Di Capua F, Dingfelder J, Doležal Z, Dong TV, Epifanov D, Ferber T, Ferlewicz D, Fulsom BG, 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 MT, Herrmann D, Hou WS, Hsu CL, Iijima T, Inami K, Ipsita N, Ishikawa A, Itoh R, Iwasaki M, Jacobs WW, Jang EJ, Ji QP, Jia S, Jin Y, Joo KK, Kalita D, Kaliyar AB, Kawasaki T, Kiesling C, Kim CH, Kim DY, Kim KH, Kim YK, Kindo H, Kinoshita K, Kodyš P, Korpar S, Križan P, Krokovny P, Kuhr T, Kumar M, Kumar R, Kumara K, Kwon YJ, Lange JS, Lee SC, Li J, Li LK, Libby J, Lieret K, Lin YR, Liventsev D, Luo T, Ma Y, Masuda M, Matsuda T, Maurya SK, Meier F, Merola M, Metzner F, Miyabayashi K, Mizuk R, Mohanty GB, Mussa R, Nakao M, Narwal D, Natkaniec Z, Natochii A, Nayak L, Nayak M, Nisar NK, Nishida S, Ogawa S, Oskin P, Pakhlova G, Pardi S, Park H, Park J, Park SH, Passeri A, Patra S, Paul S, Pestotnik R, Piilonen LE, Podobnik T, Prencipe E, Prim MT, 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 JG, Singh JB, Sokolov A, Solovieva E, Starič M, Stottler ZS, 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 SE, Varner G, Vinokurova A, Vossen A, Wang D, Wang E, Wang MZ, Watanuki S, Werbycka O, Xu X, Yabsley BD, Yan W, Yang SB, Yelton J, Yin JH, Yuan CZ, Yusa Y, Zhang ZP, Zhilich V, and Zhukova V
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.
Published: 2023
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313. Search for the Lepton Flavor Violating Decays B^{+}→K^{+}τ^{±}ℓ^{∓} (ℓ=e, μ) at Belle.

Author: Watanuki S, de Marino G, Trabelsi K, Adachi I, Aihara H, Asner DM, Atmacan H, Aulchenko V, Aushev T, Ayad R, Babu V, Banerjee S, 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 TE, Budano A, Campajola M, Cao L, Červenkov D, Chang MC, Cheon BG, Chilikin K, Cho K, Cho SJ, Choi SK, Choi Y, Choudhury S, Cinabro D, Das S, De Nardo G, De Pietro G, Dhamija R, Di Capua F, Dong TV, Epifanov D, Ferber T, Ferlewicz D, Fulsom BG, 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 WS, Hsu CL, Inami K, Inguglia G, Ipsita N, Ishikawa A, Itoh R, Iwasaki M, Jacobs WW, Ji QP, Jia S, Jin Y, Joo KK, Kaliyar AB, Kichimi H, Kim CH, Kim DY, Kim KH, Kim YK, Kinoshita K, Kodyš P, Korobov A, Korpar S, Kovalenko E, Križan P, Krokovny P, Kuhr T, Kumar M, Kumara K, Kuzmin A, Kwon YJ, Lange JS, Laurenza M, Lee SC, Lewis P, Li LK, Li Y, Li Gioi L, Libby J, Lin YR, Liventsev D, Matsuda T, Maurya SK, Meier F, Merola M, Metzner F, Miyabayashi K, Mizuk R, Mohanty GB, Nakao M, Nayak L, Nayak M, Nisar NK, Nishida S, Ono H, Oskin P, Pakhlova G, Pardi S, Park H, Park J, Park SH, Passeri A, Pedlar TK, Pestotnik R, Piilonen LE, Podobnik T, Prencipe E, Prim MT, Röhrken M, Rout N, Russo G, Sandilya S, Sangal A, Santelj L, Savinov V, Schnell G, Schwanda C, Seino Y, Senyo K, Sevior ME, Shan W, Shapkin M, Shiu JG, 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 KE, Wang D, Wang E, Wang MZ, Won E, Xu X, Yabsley BD, Yan W, Yang SB, Yelton J, Yusa Y, Zhang ZP, Zhilich V, and Zhukova V
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.
Published: 2023
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314. First Measurement of the B^{+}→π^{+}π^{0}π^{0} Branching Fraction and CP Asymmetry.

Author: Lai YT, Adachi I, Aihara H, Al Said S, Asner DM, 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 TE, Budano A, Campajola M, Červenkov D, Chang MC, Chang P, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho HE, Cho K, Cho SJ, Choi SK, 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 TV, Ferber T, Fulsom BG, 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 WS, Hsu CL, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jang EJ, Jia S, Jin Y, Kaliyar AB, Kang KH, Kim CH, Kim DY, Kim KH, Kim YK, 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 YJ, Lam T, Lange JS, Laurenza M, Lee SC, Levit D, Li J, Li LK, Li YB, Li Gioi L, Libby J, Lieret K, Liventsev D, Martini A, Masuda M, Matvienko D, Meier F, Merola M, Metzner F, Mizuk R, Mohanty GB, Moon TJ, Mrvar M, Mussa R, Nakao M, Natochii A, Nayak L, Nisar NK, Nishida S, Ogawa S, Pakhlova G, Pang T, Pardi S, Park H, Park SH, Passeri A, Patra S, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Podobnik T, Prencipe E, Prim MT, 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 ME, Shapkin M, Sharma C, Shen CP, Shiu JG, Singh JB, Sokolov A, Solovieva E, Starič M, Stottler ZS, Strube JF, 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 KE, Vinokurova A, Vossen A, Waheed E, Wang CH, Wang XL, Watanabe M, Watanuki S, Won E, Yabsley BD, Yan W, Yang SB, Ye H, Yelton J, Zhai Y, Zhang ZP, Zhilich V, and Zhukova V
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.
Published: 2023
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315. First Observation of Λπ^{+} and Λπ^{-} Signals near the K[over ¯]N(I=1) Mass Threshold in Λ_{c}^{+}→Λπ^{+}π^{+}π^{-} Decay.

Author: Ma Y, Yelton J, Tanida K, Adachi I, Ahn JK, Aihara H, Al Said S, Asner DM, Atmacan H, Aushev T, Ayad R, Babu V, Bahinipati S, Banerjee S, 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 TE, Budano A, Campajola M, Červenkov D, Chang MC, Chen A, Cheon BG, Chilikin K, Cho HE, Cho K, Cho SJ, Choi SK, Choi Y, Choudhury S, Cinabro D, Das S, De Nardo G, De Pietro G, Dhamija R, Di Capua F, Dingfelder J, Doležal Z, Dong TV, Epifanov D, Ferber T, Ferlewicz D, Fulsom BG, 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 MT, Hou WS, Hsu CL, Inami K, Ipsita N, Ishikawa A, Itoh R, Iwasaki M, Jacobs WW, Jang EJ, Jia S, Jin Y, Kaliyar AB, Kang KH, Kawasaki T, Kiesling C, Kim CH, Kim DY, Kim YK, Kinoshita K, Kodyš P, Korobov A, Korpar S, Kovalenko E, Križan P, Krokovny P, Kumar R, Kumara K, Kwon YJ, Lam T, Lange JS, Lee SC, Lewis P, Li LK, Li Y, Li Gioi L, Libby J, Lieret K, Lin YR, Liventsev D, Luo T, Masuda M, Matsuda T, Matvienko D, Maurya SK, Meier F, Merola M, Metzner F, Miyabayashi K, Mohanty GB, Mussa R, Nakamura I, Nakano T, Nakao M, Natkaniec Z, Natochii A, Nayak L, Nayak M, Nisar NK, 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 LE, Podobnik T, Prencipe E, Prim MT, Rostomyan A, Rout N, Russo G, Sandilya S, Santelj L, Savinov V, Schnell G, Schueler J, Schwanda C, Seino Y, Senyo K, Sevior ME, Shan W, Shapkin M, Sharma C, Shen CP, Shiu JG, 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 SE, van Tonder R, Varner G, Vinokurova A, Vossen A, Wang D, Wang MZ, Watanabe M, Watanuki S, Werbycka O, Won E, Xu X, Yabsley BD, Yan W, Yang SB, Yin JH, Yuan CZ, Yuan L, Zhang ZP, Zhilich V, and Zhukova V
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.
Published: 2023
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316. Evidence of a New Excited Charmed Baryon Decaying to Σ_{c}(2455)^{0,++}π^{±}.

Author: Li YB, Shen CP, Adachi I, Aihara H, Asner DM, 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 TE, Budano A, Campajola M, Červenkov D, Chang MC, Chang P, Cheon BG, Chilikin K, Cho HE, Cho K, Cho SJ, Choi SK, Choi Y, Choudhury S, Cinabro D, Das S, De Pietro G, Dhamija R, Di Capua F, Dingfelder J, Doležal Z, Dong TV, Dossett D, Epifanov D, Fulsom BG, 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 WS, Hsu CL, Iijima T, Inami K, Ipsita N, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jang EJ, Ji QP, Jia S, Jin Y, Joo KK, Karyan G, Kawasaki T, Kichimi H, Kiesling C, Kim CH, Kim DY, Kim KH, Kim YK, 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 YJ, Lam T, Lange JS, Laurenza M, Lee SC, Li CH, Li J, Li LK, Li Y, Li Gioi L, Libby J, Lieret K, Liventsev D, Masuda M, Matsuda T, Matvienko D, Maurya SK, Meier F, Merola M, Metzner F, Miyabayashi K, Mizuk R, Mohanty GB, Nakamura I, Nakao M, Natkaniec Z, Natochii A, Nayak L, Niiyama M, Nisar NK, Nishida S, Ogawa S, Ono H, Oskin P, Pakhlov P, Pakhlova G, Pardi S, Park H, Park SH, Patra S, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Podobnik T, Prencipe E, Prim MT, Rout N, Russo G, Sandilya S, Santelj L, Savinov V, Schnell G, Schueler J, Schwanda C, Seino Y, Senyo K, Sevior ME, Shapkin M, Sharma C, Shiu JG, Singh JB, Sokolov A, Solovieva E, Starič M, Stottler ZS, 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 KE, Waheed E, Wang E, Wang MZ, Watanabe M, Watanuki S, Werbycka O, Wiechczynski J, Won E, Yabsley BD, Yan W, Yang SB, Yelton J, Yin JH, Yuan CZ, Yusa Y, Zhai Y, Zhang ZP, Zhilich V, and Zhukova V
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.
Published: 2023
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317. Measurement of Two-Particle Correlations of Hadrons in e^{+}e^{-} Collisions at Belle.

Author: Chen YC, Lee YJ, Chang P, Adachi I, Aihara H, Al Said S, Asner DM, Aushev T, Ayad R, Babu V, Behera P, Belous K, Bennett J, Bessner M, Bilka T, Bodrov D, Borah J, Bračko M, Branchini P, Browder TE, Budano A, Campajola M, Červenkov D, Chang MC, Chekelian V, Cheon BG, Chilikin K, Cho HE, Cho K, Cho SJ, Choi SK, Choi Y, Cinabro D, Das S, De Nardo G, De Pietro G, Dhamija R, Di Capua F, Dingfelder J, Dong TV, Dossett D, Epifanov D, Ferber T, Fulsom BG, Garg R, Gaur V, Giri A, Goldenzweig P, Gu T, Gudkova K, Hadjivasiliou C, Hartbrich O, Hayasaka K, Hayashii H, Hou WS, Hsu CL, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jia S, Jin Y, Kaliyar AB, Kim CH, Kim DY, Kim KH, Kim YK, Kodyš P, Konno T, Korobov A, Korpar S, Kovalenko E, Križan P, Kroeger R, Krokovny P, Kumar M, Kumar R, Kumara K, Kuzmin A, Kwon YJ, Lai YT, Lam T, Lange JS, Laurenza M, Lee SC, Li J, Li Y, Li YB, Li Gioi L, Libby J, Lieret K, Lin CW, Liventsev D, Martini A, Masuda M, Matsuda T, Matvienko D, Meier F, Merola M, Metzner F, Miyabayashi K, Mohanty GB, Moon TJ, Mussa R, Nakao M, Natochii A, Nayak L, Nisar NK, Nishida S, Nishimura K, Ogawa S, Ono H, Pakhlova G, Pang T, Pardi S, Park SH, Patra S, Paul S, Pedlar TK, Piilonen LE, Podobnik T, Prencipe E, Prim MT, Rout N, Russo G, Sahoo D, Sandilya S, Sangal A, Santelj L, Sanuki T, Savinov V, Schnell G, Schwanda C, Seidl R, Seino Y, Sevior ME, Shapkin M, Shiu JG, Singh JB, Sokolov A, Solovieva E, Starič M, Stottler ZS, Sumihama M, Sumisawa K, Sutcliffe W, Takizawa M, Tamponi U, Tanida K, Tenchini F, Uchida M, Uglov T, Unno Y, Uno K, Uno S, Van Tonder R, Varner G, Vinokurova A, Vossen A, Waheed E, Wang CH, Wang D, Wang E, Wang XL, Watanuki S, Won E, Yan W, Yang SB, Ye H, Yelton J, Zhai Y, Zhang ZP, Zhilich V, and Zhukova V
Abstract: The measurement of two-particle angular correlation functions in high-multiplicity e^{+}e^{-} collisions at sqrt[s]=10.52 GeV is reported. In this study, the 89.5 fb^{-1} of hadronic e^{+}e^{-} annihilation data collected by the Belle detector at KEKB are used. Two-particle angular correlation functions are measured in the full relative azimuthal angle (Δϕ) and three units of pseudorapidity (Δη), defined by either the electron beam axis or the event-shape thrust axis, and are studied as a function of charged-particle multiplicity. The measurement in the thrust axis analysis, with mostly outgoing quark pairs determining the reference axis, is sensitive to the region of additional soft gluon emissions. No significant anisotropic collective behavior is observed with either coordinate analyses. Near-side jet correlations appear to be absent in the thrust axis analysis. The measurements are compared to predictions from various event generators and are expected to provide new constraints to the phenomenological models in the low-energy regime.
Published: 2022
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318. Search for a Light Higgs Boson in Single-Photon Decays of ϒ(1S) Using ϒ(2S)→π^{+}π^{-}ϒ(1S) Tagging Method.

Author: Jia S, Shen CP, Adachi I, Aihara H, Al Said S, Asner DM, Atmacan H, Aushev T, Ayad R, Babu V, Behera P, Belous K, Bennett J, Bessner M, Bhardwaj V, Bhuyan B, Bilka T, Bobrov A, Bodrov D, Bonvicini G, Borah J, Bračko M, Branchini P, Browder TE, Budano A, Campajola M, Červenkov D, Chang MC, Chang P, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho HE, Cho K, Cho SJ, Choi SK, 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 TV, Epifanov D, Ferber T, Ferlewicz D, Fulsom BG, Garg R, Gaur V, Gabyshev N, Giri A, Goldenzweig P, Golob B, Graziani E, Guan Y, Gudkova K, Hadjivasiliou C, Hara T, Hayasaka K, Hayashii H, Hedges MT, Hou WS, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jang EJ, Jin Y, Joo KK, Kahn J, Kaliyar AB, Kang KH, Kawasaki T, Kiesling C, Kim CH, Kim DY, Kim KH, Kim YK, Kinoshita K, Kodyš P, Kohani S, Konno T, Korobov A, Korpar S, Kovalenko E, Križan P, Kroeger R, Krokovny P, Kumar M, Kumar R, Kumara K, Kwon YJ, Lam T, Laurenza M, Lee SC, Li J, Li LK, Li Y, Li YB, Li Gioi L, Libby J, Lieret K, Liventsev D, Martini A, Masuda M, Matsuda T, Matvienko D, Maurya SK, Meier F, Merola M, Metzner F, Miyabayashi K, Mizuk R, Mohanty GB, Mussa R, Nakao M, Narwal D, Natkaniec Z, Natochii A, Nayak L, Nisar NK, Nishida S, Nishimura K, Ogawa K, Ogawa S, Ono H, Oskin P, Pakhlov P, Pakhlova G, Pang T, Pardi S, Park SH, Patra S, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Podobnik T, Prencipe E, Prim MT, Röhrken M, Rostomyan A, Rout N, Russo G, Sahoo D, Sandilya S, Sangal A, Santelj L, Sanuki T, Savinov V, Schnell G, Schueler J, Schwanda C, Seino Y, Senyo K, Sevior ME, Shapkin M, Sharma C, Shebalin V, Shiu JG, Shwartz B, Singh JB, Sokolov A, Solovieva E, Stanič S, Starič M, Stottler ZS, Sumihama M, Sumisawa K, Sumiyoshi T, Sutcliffe W, Takizawa M, Tamponi U, Tanida K, Tenchini F, Trabelsi K, Uchida M, Uehara S, Uglov T, Unno Y, Uno K, Uno S, Urquijo P, Vahsen SE, Van Tonder R, Varner G, Vinokurova A, Waheed E, Wang D, Wang E, Wang MZ, Watanuki S, Won E, Yabsley BD, Yan W, Yang SB, Ye H, Yelton J, Yin JH, Yusa Y, Zhai Y, Zhang ZP, Zhilich V, and Zhukova V
Abstract: We search for a light Higgs boson (A^{0}) decaying into a τ^{+}τ^{-} or μ^{+}μ^{-} pair in the radiative decays of ϒ(1S). The production of ϒ(1S) mesons is tagged by ϒ(2S)→π^{+}π^{-}ϒ(1S) transitions, using 158×10^{6} ϒ(2S) events accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant A^{0} signals in the mass range from the τ^{+}τ^{-} or μ^{+}μ^{-} threshold to 9.2 GeV/c^{2} are observed. We set the upper limits at 90% credibility level (C.L.) on the product branching fractions for ϒ(1S)→γA^{0} and A^{0}→τ^{+}τ^{-} varying from 3.8×10^{-6} to 1.5×10^{-4}. Our results represent an approximately twofold improvement on the current world best upper limits for the ϒ(1S)→γA^{0}(→τ^{+}τ^{-}) production. For A^{0}→μ^{+}μ^{-}, the upper limits on the product branching fractions for ϒ(1S)→γA^{0} and A^{0}→μ^{+}μ^{-} are at the same level as the world average limits, and vary from 3.1×10^{-7} to 1.6×10^{-5}. The upper limits at 90% credibility level on the Yukawa coupling f_{ϒ(1S)} and mixing angle sinθ_{A^{0}} are also given.
Published: 2022
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319. Measurement of Differential Branching Fractions of Inclusive B→X_{u}ℓ^{+}ν_{ℓ} Decays.

Author: Cao L, Sutcliffe W, Van Tonder R, Bernlochner FU, Adachi I, Aihara H, Asner DM, Aushev T, Ayad R, Babu V, Bahinipati S, Behera P, Belous K, Bennett J, Bessner M, Bilka T, Biswal J, Bobrov A, Bračko M, Branchini P, Browder TE, Budano A, Campajola M, Červenkov D, Chang MC, Chang P, Cheon BG, Chilikin K, Cho HE, Cho K, Cho SJ, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Czank T, Dash N, De Pietro G, Dhamija R, Di Capua F, Dingfelder J, Doležal Z, Dong TV, Dubey S, Epifanov D, Ferber T, Ferlewicz D, Frey A, Fulsom BG, Garg R, Gaur V, Gabyshev N, Garmash A, Giri A, Goldenzweig P, Gu T, Gudkova K, Halder S, Hara T, Hartbrich O, Hayasaka K, Hernandez Villanueva M, Hou WS, Hsu CL, Inami K, Ishikawa A, Itoh R, Iwasaki M, Jacobs WW, Jang EJ, Jia S, Jin Y, Joo KK, Kahn J, Kang KH, Kichimi H, Kiesling C, Kim CH, Kim DY, Kim SH, Kim YK, Kimmel TD, Kinoshita K, Kodyš P, Konno T, Korobov A, Korpar S, Kovalenko E, Križan P, Kroeger R, Krokovny P, Kuhr T, Kulasiri R, Kumar M, Kumar R, Kumara K, Kuzmin A, Kwon YJ, Lee SC, Li CH, Li J, Li LK, Li YB, Li Gioi L, Libby J, Lieret K, Liventsev D, MacQueen C, Masuda M, Merola M, Metzner F, Miyabayashi K, Mizuk R, Mohanty GB, Mohanty S, Mrvar M, Nakao M, Natochii A, Nayak L, Niiyama M, Nisar NK, Nishida S, Nishimura K, Ogawa S, Ono H, Onuki Y, Oskin P, Pakhlova G, Pardi S, Park H, Park SH, Passeri A, Patra S, Paul S, Pedlar TK, Piilonen LE, Podobnik T, Popov V, Prencipe E, Prim MT, Röhrken M, Rostomyan A, Rout N, Rozanska M, Russo G, Sahoo D, Sandilya S, Sangal A, Santelj L, Sanuki T, Savinov V, Schnell G, Schueler J, Schwanda C, Schwartz AJ, Seino Y, Senyo K, Sevior ME, Shapkin M, Sharma C, Shen CP, Shiu JG, Shwartz B, Simon F, Sokolov A, Solovieva E, Starič M, Strube JF, Sumihama M, Sumiyoshi T, Takizawa M, Tamponi U, Tanida K, Tao Y, Tenchini F, Trabelsi K, Uchida M, Uglov T, Uno S, Urquijo P, Vahsen SE, Varner G, Varvell KE, Waheed E, Wang CH, Wang E, Wang MZ, Wang P, Wang XL, Watanabe M, Watanuki S, Werbycka O, Won E, Yabsley BD, Yan W, Yang SB, Ye H, Yin JH, Zhang ZP, Zhilich V, and Zhukova V
Abstract: The first measurements of differential branching fractions of inclusive semileptonic B→X_{u}ℓ^{+}ν_{ℓ} decays are performed using the full Belle data set of 711 fb^{-1} of integrated luminosity at the ϒ(4S) resonance and for ℓ=e, μ. With the availability of these measurements, new avenues for future shape-function model-independent determinations of the Cabibbo-Kobayashi-Maskawa matrix element |V_{ub}| can be pursued to gain new insights in the existing tension with respect to exclusive determinations. The differential branching fractions are reported as a function of the lepton energy, the four-momentum-transfer squared, light-cone momenta, the hadronic mass, and the hadronic mass squared. They are obtained by subtracting the backgrounds from semileptonic B→X_{c}ℓ^{+}ν_{ℓ} decays and other processes, and corrected for resolution and acceptance effects.
Published: 2021
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320. Precise Measurement of the D^{0} and D^{+} Lifetimes at Belle II.

Author: Abudinén F, Adachi I, Adamczyk K, Aggarwal L, Ahmed H, Aihara H, Akopov N, Aloisio A, Anh Ky N, Asner DM, Atmacan H, Aushev V, Babu V, Bacher S, Bae H, Baehr S, Bahinipati S, Bambade P, Banerjee S, Bansal S, Barrett M, Baudot J, Bauer M, Baur A, Becker J, Behera PK, Bennett JV, Bernieri E, Bernlochner FU, Bertemes M, Bertholet E, Bessner M, Bettarini S, Bhardwaj V, Bianchi F, Bilka T, Bilokin S, Biswas D, Bobrov A, Bodrov D, Bolz A, Bozek A, Bračko M, Branchini P, Braun N, Briere RA, Browder TE, Budano A, Bussino S, Campajola M, Cao L, Casarosa G, Cecchi C, Červenkov D, Chang MC, Chang P, Cheaib R, Chekelian V, Chen C, Chen YT, Cheon BG, Chilikin K, Chirapatpimol K, Cho HE, Cho K, Cho SJ, Choi SK, Choudhury S, Cinabro D, Corona L, Cremaldi LM, Cunliffe S, Czank T, Dattola F, De La Cruz-Burelo E, de Marino G, De Nardo G, De Pietro G, de Sangro R, Destefanis M, Dey S, De Yta-Hernandez A, Di Canto A, Di Capua F, Dingfelder J, Doležal Z, Domínguez Jiménez I, Dong TV, Dorigo M, Dort K, Dossett D, Dubey S, Duell S, Dujany G, Ecker P, Epifanov D, Ferber T, Ferlewicz D, Finocchiaro G, Flood K, Fodor A, Forti F, Fulsom BG, Gabrielli A, Gabyshev N, Gaz A, Gellrich A, Giakoustidis G, Giordano R, Giri A, Glazov A, Gobbo B, Godang R, Goldenzweig P, Golob B, Gradl W, Graziani E, Greenwald D, Gu T, Guan Y, Gudkova K, Guilliams J, Hadjivasiliou C, Halder S, Hara K, Hara T, Hartbrich O, Hayasaka K, Hayashii H, Hazra S, Hearty C, Heredia de la Cruz I, Hernández Villanueva M, Hershenhorn A, Higuchi T, Hill EC, Hirata H, Hoek M, Hohmann M, Hsu CL, Humair T, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jaffe DE, Jang EJ, Jia S, Jin Y, Junkerkalefeld H, Kakuno H, Kaliyar AB, Kandra J, Kang KH, Karl R, Karyan G, Kato Y, Kawasaki T, Kiesling C, Kim CH, Kim DY, Kim YK, Kim Y, Kimmel TD, Kinoshita K, Kodyš P, Koga T, Kohani S, Konno T, Korpar S, Kovalenko E, Kowalewski R, Kraetzschmar TMG, Krinner F, Križan P, Krokovny P, Kuhr T, Kumar J, Kumar M, Kumar R, Kumara K, Kurz S, Kuzmin A, Kwon YJ, Lacaprara S, Lalwani K, Lam T, Lanceri L, Lange JS, Laurenza M, Lautenbach K, Le Diberder FR, Lee SC, Leitl P, Levit D, Li C, Li LK, Libby J, Lieret K, Liptak Z, Liu QY, Liventsev D, Longo S, Lueck T, Lyu C, Manfredi R, Manoni E, Marinas C, Martini A, Matsuda T, Matsuoka K, Matvienko D, McKenna JA, Meier F, Merola M, Metzner F, Miller C, Miyabayashi K, Mizuk R, Mohanty GB, Molina-Gonzalez N, Moon H, Moser HG, Mrvar M, Murphy C, Mussa R, Nakamura I, Nakamura KR, Nakao M, Nakazawa H, Natkaniec Z, Natochii A, Nazaryan G, Niebuhr C, Niiyama M, Nisar NK, Nishida S, Nishimura K, Ogawa S, Onishchuk Y, Ono H, Onuki Y, Oskin P, Oxford ER, Ozaki H, Pakhlov P, Paladino A, Pang T, Panta A, Paoloni E, Pardi S, Park H, Park SH, Paschen B, Passeri A, Pathak A, Patra S, Paul S, Pedlar TK, Peruzzi I, Peschke R, Pestotnik R, Pham F, Piccolo M, Piilonen LE, Pinna Angioni G, Podesta-Lerma PLM, Podobnik T, Pokharel S, Polat G, Popov V, Praz C, Prell S, Prencipe E, Prim MT, Purohit MV, Purwar H, Rad N, Rados P, Raiz S, Reiter S, Remnev M, Ripp-Baudot I, Rizzo G, Rizzuto LB, Robertson SH, Roney JM, Rostomyan A, Rout N, Rozanska M, Sahoo D, Sanders DA, Sandilya S, Sangal A, Santelj L, Sato Y, Savinov V, Scavino B, Schueler J, Schwanda C, Schwartz AJ, Seino Y, Selce A, Senyo K, Serrano J, Sfienti C, Shiu JG, Shwartz B, Sibidanov A, Simon F, Sobie RJ, Soffer A, Sokolov A, Solovieva E, Spataro S, Spruck B, Starič M, Stefkova S, Stottler ZS, Stroili R, Strube J, Sumihama M, Sutcliffe W, Suzuki SY, Svidras H, Tabata M, Takizawa M, Tamponi U, Tanaka S, Tanida K, Tanigawa H, Taniguchi N, Tenchini F, Tiwary R, Tonelli D, Torassa E, Toutounji N, Trabelsi K, Tsuboyama T, Ueda I, Uehara S, Uematsu Y, Uglov T, Unger K, Unno Y, Uno K, Uno S, Urquijo P, Ushiroda Y, Usov YV, Vahsen SE, van Tonder R, Varner GS, Vinokurova A, Vitale L, Vossen A, Waheed E, Wakeling HM, Wang E, Wang MZ, Wang XL, Warburton A, Watanabe M, Welsch M, Wessel C, Wiechczynski J, Won E, Xu XP, Yabsley BD, Yamada S, Yan W, Yang SB, Ye H, Yelton J, Yin JH, Yoshihara K, Yusa Y, Zani L, Zhilich V, Zhou QD, Zhou XY, Zhukova VI, and Žlebčík R
Abstract: We report a measurement of the D^{0} and D^{+} lifetimes using D^{0}→K^{-}π^{+} and D^{+}→K^{-}π^{+}π^{+} decays reconstructed in e^{+}e^{-}→cc[over ¯] data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy e^{+}e^{-} collider. The data, collected at center-of-mass energies at or near the ϒ(4S) resonance, correspond to an integrated luminosity of 72 fb^{-1}. The results, τ(D^{0})=410.5±1.1(stat)±0.8(syst) fs and τ(D^{+})=1030.4±4.7(stat)±3.1(syst) fs, are the most precise to date and are consistent with previous determinations.
Published: 2021
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321. Search for B^{+}→K^{+}νν[over ¯] Decays Using an Inclusive Tagging Method at Belle II.

Author: Abudinén F, Adachi I, Adamczyk K, Ahlburg P, Aihara H, Akopov N, Aloisio A, Anh Ky N, Asner DM, Atmacan H, Aushev T, Aushev V, Baur A, Babu V, Baehr S, Bambade P, Banerjee S, Bansal S, Baudot J, Becker J, Behera PK, Bennett JV, Bernieri E, Bernlochner FU, Bertemes M, Bertholet E, Bessner M, Bettarini S, Bianchi F, Bilka T, Biswas D, Bozek A, Bračko M, Branchini P, Braun N, Browder TE, Budano A, Bussino S, Campajola M, Cao L, Casarosa G, Cecchi C, Červenkov D, Chang P, Cheaib R, Chekelian V, Chen C, Chen YT, Cheon BG, Chilikin K, Chirapatpimol K, Cho K, Cho SJ, Choudhury S, Cinabro D, Corona L, Cremaldi LM, Cunliffe S, Czank T, Dattola F, De La Cruz-Burelo E, de Marino G, De Nardo G, De Nuccio M, De Pietro G, de Sangro R, Destefanis M, Dey S, De Yta-Hernandez A, Di Canto A, Di Capua F, Dingfelder J, Doležal Z, Domínguez Jiménez I, Dong TV, Dort K, Dubey S, Duell S, Dujany G, Eidelman S, Eliachevitch M, Epifanov D, Ferber T, Ferlewicz D, Fillinger T, Finocchiaro G, Fiore S, Fodor A, Forti F, Frey A, Fulsom BG, Gabyshev N, Ganiev E, Garcia-Hernandez M, Garmash A, Gaur V, Gaz A, Gellrich A, Giordano R, Giri A, Glazov A, Gobbo B, Godang R, Goldenzweig P, Golob B, Grace P, Gradl W, Graziani E, Greenwald D, Guan Y, Gudkova K, Hadjivasiliou C, Halder S, Hara K, Hartbrich O, Hayasaka K, Hayashii H, Hazra S, Hearty C, Heredia de la Cruz I, Hernández Villanueva M, Hershenhorn A, Higuchi T, Hill EC, Hirata H, Hoek M, Hohmann M, Hsu CL, Humair T, Iijima T, Inami K, Inguglia G, Irakkathil Jabbar J, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jackson P, Jacobs WW, Jaffe DE, Jin Y, Joo C, Junkerkalefeld H, Kaliyar AB, Kandra J, Kang KH, Karl R, Karyan G, Kawasaki T, Ketter C, Kichimi H, Kiesling C, Kim CH, Kim DY, Kim YK, Kimmel TD, Kodyš P, Koga T, Kohani S, Konno T, Korobov A, Korpar S, Kovalenko E, Kraetzschmar TMG, Krinner F, Križan P, Krokovny P, Kuhr T, Kumar J, Kumar M, Kumar R, Kumara K, Kunigo T, Kurz S, Kuzmin A, Kwon YJ, Lacaprara S, Lai YT, La Licata C, Lanceri L, Lange JS, Laurenza M, Lautenbach K, Le Diberder FR, Lee SC, Leitl P, Levit D, Lewis PM, Li C, Li LK, Li SX, Li YB, Libby J, Lieret K, Liptak Z, Liu QY, Liventsev D, Longo S, Lozar A, Lueck T, Lyu C, Maggiora M, Maity S, Manfredi R, Manoni E, Marcello S, Marinas C, Martini A, Masuda M, Matsuda T, Matsuoka K, Matvienko D, Meier F, Merola M, Metzner F, Milesi M, Miller C, Miyabayashi K, Miyake H, Mizuk R, Mohanty GB, Moser HG, Mrvar M, Müller FJ, Murphy C, Mussa R, Nakamura KR, Nakao M, Natkaniec Z, Natochii A, Nayak M, Nazaryan G, Niebuhr C, Nisar NK, Nishida S, Nishimura K, Ogawa S, Onishchuk Y, Ono H, Onuki Y, Oskin P, Ozaki H, Pakhlov P, Pakhlova G, Paladino A, Pang T, Panta A, Paoloni E, Pardi S, Park H, Park SH, Paschen B, Passeri A, Pathak A, Patra S, Paul S, Pedlar TK, Peruzzi I, Pestotnik R, Piccolo M, Piilonen LE, Podesta-Lerma PLM, Podobnik T, Pokharel S, Polat G, Popov V, Praz C, Prell S, Prencipe E, Prim MT, Rad N, Rados P, Raiz S, Remnev M, Ripp-Baudot I, Ritter M, Rizzo G, Rizzuto LB, Robertson SH, Rodríguez Pérez D, Roney JM, Rostomyan A, Rout N, Russo G, Sahoo D, Sanders DA, Sandilya S, Sangal A, Santelj L, Sato Y, Savinov V, Scavino B, Schueler J, Schwanda C, Schwartz AJ, Seddon RM, Seino Y, Selce A, Senyo K, Serrano J, Sevior ME, Sfienti C, Shiu JG, Shwartz B, Sibidanov A, Simon F, Sobie RJ, Soffer A, Sokolov A, Solovieva E, Spataro S, Spruck B, Starič M, Stefkova S, Stottler ZS, Stroili R, Sumihama M, Sumisawa K, Summers DJ, Sutcliffe W, Suzuki SY, Svidras H, Tabata M, Takahashi M, Takizawa M, Tamponi U, Tanaka S, Tanida K, Tanigawa H, Taniguchi N, Taras P, Tenchini F, Tonelli D, Torassa E, Toutounji N, Trabelsi K, Uchida M, Unno Y, Uno K, Uno S, Urquijo P, Ushiroda Y, Usov YV, Vahsen SE, van Tonder R, Varner GS, Varvell KE, Vinokurova A, Vitale L, Wach B, Waheed E, Wakeling HM, Wan Abdullah W, Wang MZ, Wang XL, Warburton A, Watanuki S, Webb J, Welsch M, Wessel C, Wiechczynski J, Windel H, Xu XP, Yabsley BD, Yamada S, Yan W, Yang SB, Ye H, Yelton J, Yin JH, Yook YM, Yoshihara K, Yuan CZ, Yusa Y, Zani L, Zhilich V, Zhou QD, Zhou XY, and Zhukova VI
Abstract: A search for the flavor-changing neutral-current decay B^{+}→K^{+}νν[over ¯] is performed at the Belle II experiment at the SuperKEKB asymmetric energy electron-positron collider. The data sample corresponds to an integrated luminosity of 63 fb^{-1} collected at the ϒ(4S) resonance and a sample of 9 fb^{-1} collected at an energy 60 MeV below the resonance. Because the measurable decay signature involves only a single charged kaon, a novel measurement approach is used that exploits not only the properties of the B^{+}→K^{+}νν[over ¯] decay, but also the inclusive properties of the other B meson in the ϒ(4S)→BB[over ¯] event, to suppress the background from other B meson decays and light-quark pair production. This inclusive tagging approach offers a higher signal efficiency compared to previous searches. No significant signal is observed. An upper limit on the branching fraction of B^{+}→K^{+}νν[over ¯] of 4.1×10^{-5} is set at the 90% confidence level.
Published: 2021
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322. Measurements of the Branching Fractions of the Semileptonic Decays Ξ_{c}^{0}→Ξ^{-}ℓ^{+}ν_{ℓ} and the Asymmetry Parameter of Ξ_{c}^{0}→Ξ^{-}π^{+}.

Author: Li YB, Shen CP, Adachi I, Adamczyk K, Aihara H, Al Said S, Asner DM, Aushev T, Ayad R, Babu V, Behera P, Bennett J, Bessner M, Bhardwaj V, Bhuyan B, Bilka T, Biswal J, Bonvicini G, Bozek A, Bračko M, Browder TE, Campajola M, Červenkov D, Chang MC, Chen A, Cheon BG, Chilikin K, Cho K, Cho SJ, Choi SK, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Das S, Dash N, De Nardo G, Dhamija R, Di Capua F, Dong TV, Eidelman S, Epifanov D, Ferber T, Fulsom BG, Garg R, Gaur V, Gabyshev N, Garmash A, Giri A, Goldenzweig P, Grzymkowska O, Gudkova K, Hadjivasiliou C, Hartbrich O, Hayasaka K, Hayashii H, Hernandez Villanueva M, Hsu CL, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jia S, Jin Y, Joo CW, Joo KK, Kang KH, Karyan G, Kato Y, Kichimi H, Kim CH, Kim DY, Kim KH, Kim SH, Kinoshita K, Kodyš P, Konno T, Korobov A, Korpar S, Kovalenko E, Križan P, Kroeger R, Krokovny P, Kuhr T, Kumar M, Kumar R, Kumara K, Kuzmin A, Kwon YJ, Lalwani K, Lange JS, Lee IS, Lee SC, Li CH, Li LK, Li Gioi L, Libby J, Lieret K, Liventsev D, Masuda M, Matvienko D, McNeil JT, Metzner F, Mizuk R, Mohanty GB, Moon TJ, Mori T, Mussa R, Natochii A, Nayak L, Nayak M, Niiyama M, Nisar NK, Nishida S, Nishimura K, Ogawa S, Ono H, Onuki Y, Pakhlov P, Pakhlova G, Pang T, Pardi S, Park H, Patra S, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Podobnik T, Popov V, Prencipe E, Prim MT, Röhrken M, Rostomyan A, Rout N, Russo G, Sahoo D, Sakai Y, Sandilya S, Santelj L, Sanuki T, Savinov V, Schnell G, Schwanda C, Seino Y, Senyo K, Shapkin M, Sharma C, Shiu JG, Sokolov A, Solovieva E, Starič M, Stottler ZS, Sumihama M, Tamponi U, Tanida K, Tenchini F, Uchida M, Uehara S, Uglov T, Uno K, Uno S, Usov Y, Van Tonder R, Varner G, Vinokurova A, Vossen A, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe M, Watanuki S, Won E, Xu X, Yan W, Yang SB, Ye H, Yin JH, Yuan CZ, Zhang ZP, Zhilich V, and Zhukova V
Abstract: Using data samples of 89.5 and 711 fb^{-1} recorded at energies of sqrt[s]=10.52 and 10.58 GeV, respectively, with the Belle detector at the KEKB e^{+}e^{-} collider, we report measurements of branching fractions of semileptonic decays Ξ_{c}^{0}→Ξ^{-}ℓ^{+}ν_{ℓ} (ℓ=e or μ) and the CP-asymmetry parameter of Ξ_{c}^{0}→Ξ^{-}π^{+} decay. The branching fractions are measured to be B(Ξ_{c}^{0}→Ξ^{-}e^{+}ν_{e})=(1.31±0.04±0.07±0.38)% and B(Ξ_{c}^{0}→Ξ^{-}μ^{+}ν_{μ})=(1.27±0.06±0.10±0.37)%, and the decay parameter α_{Ξπ} is measured to be 0.63±0.03±0.01 with much improved precision compared with the current world average. The corresponding ratio B(Ξ_{c}^{0}→Ξ^{-}e^{+}ν_{e})/B(Ξ_{c}^{0}→Ξ^{-}μ^{+}ν_{μ}) is 1.03±0.05±0.07, which is consistent with the expectation of lepton flavor universality. The first measured asymmetry parameter A_{CP}=(α_{Ξ^{-}π^{+}}+α_{Ξ[over ¯]^{+}π^{-}})/(α_{Ξ^{-}π^{+}}-α_{Ξ[over ¯]^{+}π^{-}})=0.024±0.052±0.014 is found to be consistent with zero. The first and the second uncertainties above are statistical and systematic, respectively, while the third ones arise due to the uncertainty of the Ξ_{c}^{0}→Ξ^{-}π^{+} branching fraction.
Published: 2021
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323. Evidence for X(3872)→J/ψπ^{+}π^{-} Produced in Single-Tag Two-Photon Interactions.

Author: Teramoto Y, Uehara S, Masuda M, Adachi I, Aihara H, Al Said S, Asner DM, Atmacan H, Aushev T, Ayad R, Babu V, Behera P, Beleño C, Bennett J, Bhardwaj V, Bhuyan B, Bilka T, Biswal J, Bonvicini G, Bozek A, Bračko M, Browder TE, Campajola M, Červenkov D, Chang MC, Chang P, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho K, Cho SJ, Choi SK, Choi Y, Choudhury S, Cinabro D, Cunliffe S, De Nardo G, Di Capua F, Doležal Z, Dong TV, Eidelman S, Ferber T, Fulsom BG, Garg R, Gaur V, Gabyshev N, Garmash A, Giri A, Goldenzweig P, Greenwald D, Hadjivasiliou C, Hara T, Hartbrich O, Hayasaka K, Hayashii H, Hedges MT, Hernandez Villanueva M, Hou WS, Hsu CL, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jang EJ, Jia S, Jin Y, Joo CW, Joo KK, Kahn J, Kaliyar AB, Kang KH, Karyan G, Kato Y, Kawasaki T, Kichimi H, Kiesling C, Kim BH, Kim DY, Kim SH, Kim YK, Kimmel TD, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Kroeger R, Krokovny P, Kuhr T, Kulasiri R, Kumar R, Kumara K, Kuzmin A, Kwon YJ, Lalwani K, Lange JS, Lee IS, Lee SC, Lewis P, Li LK, Li YB, Li Gioi L, Libby J, Lieret K, Liptak Z, Liventsev D, Luo T, MacQueen C, Matsuda T, Matvienko D, Merola M, Miyabayashi K, Miyata H, Mohanty GB, Mohanty S, Moon TJ, Mori T, Mrvar M, Mussa R, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Natochii A, Nayak M, Nisar NK, Nishida S, Ogawa K, Ogawa S, Ono H, Onuki Y, Pakhlov P, Pakhlova G, Pardi S, Park H, Park SH, Patra S, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Podobnik T, Popov V, Prencipe E, Prim MT, Ritter M, 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 ME, Shapkin M, Shebalin V, Shiu JG, Singh JB, Solovieva E, Starič M, Stottler ZS, Sumihama M, Sumisawa K, Sumiyoshi T, Sutcliffe W, Takizawa M, Tamponi U, Tenchini F, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Van Tonder R, Varner G, Vinokurova A, Vorobyev V, Waheed E, Wang CH, Wang E, Wang MZ, Wang P, Wang XL, Watanabe M, Won E, Xu X, Yabsley BD, Yang SB, Ye H, Yelton J, Yin JH, Zhang ZP, Zhilich V, Zhukova V, and Zhulanov V
Abstract: We report the first evidence for X(3872) production in two-photon interactions by tagging either the electron or the positron in the final state, exploring the highly virtual photon region. The search is performed in e^{+}e^{-}→e^{+}e^{-}J/ψπ^{+}π^{-}, using 825 fb^{-1} of data collected by the Belle detector operated at the KEKB e^{+}e^{-} collider. We observe three X(3872) candidates, where the expected background is 0.11±0.10 events, with a significance of 3.2σ. We obtain an estimated value for Γ[over ˜]_{γγ}B(X(3872)→J/ψπ^{+}π^{-}) assuming the Q^{2} dependence predicted by a cc[over ¯] meson model, where -Q^{2} is the invariant mass squared of the virtual photon. No X(3915)→J/ψπ^{+}π^{-} candidates are found.
Published: 2021
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324. Search for Axionlike Particles Produced in e^{+}e^{-} Collisions at Belle II.

Author: Abudinén F, Adachi I, Aihara H, Akopov N, Aloisio A, Ameli F, Anh Ky N, Asner DM, Aushev T, Aushev V, Babu V, Baehr S, Bahinipati S, Bambade P, Banerjee S, Bansal S, Baudot J, Becker J, Behera PK, Bennett JV, Bernieri E, Bernlochner FU, Bertemes M, Bessner M, Bettarini S, Bhardwaj V, Bianchi F, Bilka T, Bilokin S, Biswas D, Bračko M, Branchini P, Braun N, Browder TE, Budano A, Bussino S, Campajola M, Casarosa G, Cecchi C, Červenkov D, Chang MC, Chang P, Cheaib R, Chekelian V, Cheon BG, Chilikin K, Chirapatpimol K, Cho HE, Cho K, Cho SJ, Choi SK, Cinabro D, Corona L, Cremaldi LM, Cunliffe S, Dash N, Dattola F, De La Cruz-Burelo E, De Nardo G, De Nuccio M, De Pietro G, de Sangro R, Destefanis M, De Yta-Hernandez A, Di Capua F, Doležal Z, Dong TV, Dort K, Dossett D, Dujany G, Eidelman S, Ferber T, Ferlewicz D, Fiore S, Fodor A, Forti F, Fulsom BG, Ganiev E, Garg R, Garmash A, Gaur V, Gaz A, Gebauer U, Gellrich A, Geßler T, Giordano R, Giri A, Gobbo B, Godang R, Goldenzweig P, Golob B, Gomis P, Gradl W, Graziani E, Greenwald D, Hadjivasiliou C, Halder S, Hartbrich O, Hayasaka K, Hayashii H, Hearty C, Hedges MT, Heredia de la Cruz I, Hernández Villanueva M, Hershenhorn A, Higuchi T, Hill EC, Hirata H, Hoek M, Hohmann M, Hsu CL, Hu Y, Inami K, Inguglia G, Irakkathil Jabbar J, Ishikawa A, Itoh R, Jackson P, Jacobs WW, Jaffe DE, Jang EJ, Jia S, Jin Y, Joo C, Kaliyar AB, Kandra J, Karyan G, Kato Y, Kichimi H, Kiesling C, Kim CH, Kim DY, Kim HJ, Kim SH, Kim YK, Kimmel TD, Kinoshita K, Kleinwort C, Kodyš P, Koga T, Kohani S, Komarov I, Korpar S, Kraetzschmar TMG, Križan P, Krokovny P, Kuhr T, Kumar M, Kumar R, Kumara K, Kurz S, Kwon YJ, Lacaprara S, La Licata C, Lanceri L, Lange JS, Lee IS, Lee SC, Leitl P, Levit D, Lewis PM, Li C, Li LK, Li YB, Libby J, Lieret K, Li Gioi L, Liptak Z, Liu QY, Liventsev D, Longo S, Luo T, MacQueen C, Maeda Y, Manfredi R, Manoni E, Marcello S, Marinas C, Martini A, Masuda M, Matsuoka K, Matvienko D, Meggendorfer F, Meier F, Merola M, Metzner F, Milesi M, Miller C, Miyabayashi K, Mizuk R, Azmi K, Mohanty GB, Moser HG, Mrvar M, Müller FJ, Mussa R, Nakamura I, Nakao M, Nakazawa H, Natochii A, Niebuhr C, Nisar NK, Nishida S, Nouxman MHA, Ogawa K, Ogawa S, Ono H, Oskin P, Ozaki H, Pakhlov P, Paladino A, Panta A, Paoloni E, Pardi S, Park H, Park SH, Paschen B, Passeri A, Pathak A, Patra S, Paul S, Pedlar TK, Peruzzi I, Peschke R, Piccolo M, Piilonen LE, Polat G, Popov V, Praz C, Prencipe E, Prim MT, Purohit MV, Rad N, Rados P, Rasheed R, Reif M, Reiter S, Remnev M, Ripp-Baudot I, Ritter M, Ritzert M, Rizzo G, Robertson SH, Rodríguez Pérez D, Roney JM, Rosenfeld C, Rostomyan A, Rout N, Sahoo D, Sakai Y, Sanders DA, Sandilya S, Sangal A, Santelj L, Sato Y, Savinov V, Scavino B, Schwanda C, Schwartz AJ, Seddon RM, Seino Y, Selce A, Senyo K, Serrano J, Sevior ME, Sfienti C, Shiu JG, Sibidanov A, Simon F, Sobie RJ, Soffer A, Solovieva E, Spataro S, Spruck B, Starič M, Stefkova S, Stottler ZS, Stroili R, Strube J, Sumihama M, Sumiyoshi T, Summers DJ, Sutcliffe W, Svidras H, Tabata M, Takizawa M, Tamponi U, Tanaka S, Tanida K, Tanigawa H, Taras P, Tenchini F, Tonelli D, Torassa E, Trabelsi K, Uchida M, Uglov T, Unger K, Unno Y, Uno S, Urquijo P, Ushiroda Y, Vahsen SE, van Tonder R, Varner GS, Varvell KE, Vinokurova A, Vitale L, Waheed E, Wakai M, Wakeling HM, Wang CH, Wang MZ, Wang XL, Warburton A, Watanabe M, Watanuki S, Webb J, Wehle S, Welsch M, Wessel C, Wiechczynski J, Windel H, Won E, Wu LJ, Xu XP, Yabsley B, Yan W, Yang SB, Ye H, Yonenaga M, Yuan CZ, Yusa Y, Zani L, Zhou QD, and Zhukova VI
Abstract: We present a search for the direct production of a light pseudoscalar a decaying into two photons with the Belle II detector at the SuperKEKB collider. We search for the process e^{+}e^{-}→γa, a→γγ in the mass range 0.2
Published: 2020
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325. Measurement of R(D) and R(D^{*}) with a Semileptonic Tagging Method.

Author: Caria G, Urquijo P, Adachi I, Aihara H, Al Said S, Asner DM, Atmacan H, Aushev T, Babu V, Badhrees I, Bahinipati S, Bakich AM, Behera P, Beleño C, Bennett J, Bhuyan B, Bilka T, Biswal J, Bozek A, Bračko M, Browder TE, Campajola M, Červenkov D, Chang P, Cheaib R, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho HE, Cho K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Dash N, De Nardo G, Di Capua F, Di Carlo S, Doležal Z, Dong TV, Eidelman S, Epifanov D, Fast JE, Ferber T, Ferlewicz D, Fulsom BG, 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 WS, Hsu CL, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jeon HB, Jia S, Jin Y, Joffe D, Joo KK, Kaliyar AB, Kang KH, Karyan G, Kawasaki T, Kichimi H, Kim CH, Kim DY, Kim HJ, Kim KT, Kim SH, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Kroeger R, Krohn JF, Krokovny P, Kuhr T, Kumar R, Kwon YJ, Lange JS, Lee IS, Lee JK, Lee SC, Li LK, Li YB, 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 GB, Moon TJ, Mori T, Mussa R, Nakamura KR, Nakao M, Nath KJ, Nayak M, Nisar NK, Nishida S, Nishimura K, Ogawa K, Ono H, Onuki Y, Oskin P, Pakhlov P, Pakhlova G, Pal B, Pang T, Park H, Park SH, Patra S, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Popov V, Prencipe E, Prim MT, Rabusov A, Resmi PK, 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 AJ, Seino Y, Senyo K, Sevior ME, Shebalin V, Shiu JG, Shwartz B, Simon F, Sokolov A, Solovieva E, Starič M, Stottler ZS, Sumiyoshi T, Sutcliffe W, Takizawa M, Tamponi U, Tanida K, Tenchini F, Trabelsi K, Uchida M, Uglov T, Uno S, Usov Y, Vahsen SE, Van Tonder R, Varner G, Varvell KE, Vossen A, Waheed E, Wang B, Wang CH, Wang MZ, Wang P, Wang XL, Watanuki S, Wiechczynski J, Won E, Yamamoto H, Yang SB, Ye H, Yin JH, Yuan CZ, Zhang ZP, Zhilich V, Zhukova V, and Zhulanov V
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.
Published: 2020
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326. Search for an Invisibly Decaying Z^{'} Boson at Belle II in e^{+}e^{-}→μ^{+}μ^{-}(e^{±}μ^{∓}) Plus Missing Energy Final States.

Author: Adachi I, Ahlburg P, Aihara H, Akopov N, Aloisio A, Anh Ky N, Asner DM, Atmacan H, Aushev T, Aushev V, Aziz T, Babu V, Baehr S, Bambade P, Banerjee S, Bansal V, Barrett M, Baudot J, Becker J, Behera PK, Bennett JV, Bernieri E, Bernlochner FU, Bertemes M, Bessner M, Bettarini S, Bianchi F, Biswas D, Bozek A, Bračko M, Branchini P, Briere RA, Browder TE, Budano A, Burmistrov L, Bussino S, Campajola M, Cao L, Casarosa G, Cecchi C, Červenkov D, Chang MC, Cheaib R, Chekelian V, Chen YQ, Chen YT, Cheon BG, Chilikin K, Cho K, Cho S, Choi SK, Choudhury S, Cinabro D, Corona L, Cremaldi LM, Cunliffe S, Czank T, Dattola F, De La Cruz-Burelo E, De Nardo G, De Nuccio M, De Pietro G, de Sangro R, Destefanis M, Dey S, De Yta-Hernandez A, Di Capua F, Doležal Z, Domínguez Jiménez I, Dong TV, Dort K, Dossett D, Dubey S, Duell S, Dujany G, Eidelman S, Eliachevitch M, Fast JE, Ferber T, Ferlewicz D, Finocchiaro G, Fiore S, Fodor A, Forti F, Fulsom BG, Ganiev E, Garcia-Hernandez M, Garg R, Gaur V, Gaz A, Gellrich A, Gemmler J, Geßler T, Giordano R, Giri A, Gobbo B, Godang R, Goldenzweig P, Golob B, Gomis P, Gradl W, Graziani E, Greenwald D, Guan Y, Hadjivasiliou C, Halder S, Hara T, Hartbrich O, Hayasaka K, Hayashii H, Hearty C, Hedges MT, Heredia de la Cruz I, Hernández Villanueva M, Hershenhorn A, Higuchi T, Hill EC, Hoek M, Hsu CL, Hu Y, Iijima T, Inami K, Inguglia G, Irakkathil Jabbar J, Ishikawa A, Itoh R, Iwasaki Y, Jacobs WW, Jaffe DE, Jang EJ, Jeon HB, Jia S, Jin Y, Joo C, Joo KK, Kahn J, Kakuno H, Kaliyar AB, Kandra J, Karyan G, Kato Y, Kawasaki T, Kim BH, Kim CH, Kim DY, Kim KH, Kim SH, Kim YK, Kim Y, Kimmel TD, Kindo H, Kleinwort C, Kodyš P, Koga T, Kohani S, Komarov I, Korpar S, Kovalchuk N, Kraetzschmar TMG, Križan P, Kroeger R, Krokovny P, Kuhr T, Kumar J, Kumar M, Kumar R, Kumara K, Kurz S, Kuzmin A, Kwon YJ, Lacaprara S, La Licata C, Lanceri L, Lange JS, Lautenbach K, Lee IS, Lee SC, Leitl P, Levit D, Li LK, Li YB, Libby J, Lieret K, Li Gioi L, Liptak Z, Liu QY, Liventsev D, Longo S, Luo T, Maeda Y, Maggiora M, Manoni E, Marcello S, Marinas C, Martini A, Masuda M, Matsuda T, Matsuoka K, Matvienko D, Meggendorfer F, Mei JC, Meier F, Merola M, Metzner F, Milesi M, Miller C, Miyabayashi K, Miyake H, Mizuk R, Azmi K, Mohanty GB, Moon T, Morii T, Moser HG, Mueller F, Müller FJ, Muller T, Muroyama G, Mussa R, Nakano E, Nakao M, Nayak M, Nazaryan G, Neverov D, Niebuhr C, Nisar NK, Nishida S, Nishimura K, Nishimura M, Oberhof B, Ogawa K, Onishchuk Y, Ono H, Onuki Y, Oskin P, Ozaki H, Pakhlov P, Pakhlova G, Paladino A, Panta A, Paoloni E, Park H, Paschen B, Passeri A, Pathak A, Paul S, Pedlar TK, Peruzzi I, Peschke R, Pestotnik R, Piccolo M, Piilonen LE, Popov V, Praz C, Prencipe E, Prim MT, Purohit MV, Rados P, Rasheed R, Reiter S, Remnev M, Resmi PK, Ripp-Baudot I, Ritter M, Rizzo G, Rizzuto LB, Robertson SH, Rodríguez Pérez D, Roney JM, Rosenfeld C, Rostomyan A, Rout N, Russo G, Sahoo D, Sakai Y, Sandilya S, Sangal A, Santelj L, Sartori P, Sato Y, Savinov V, Scavino B, Schueler J, Schwanda C, Seddon RM, Seino Y, Selce A, Senyo K, Sfienti C, Shen CP, Shiu JG, Shwartz B, Sibidanov A, Simon F, Sobie RJ, Soffer A, Sokolov A, Solovieva E, Spataro S, Spruck B, Starič M, Stefkova S, Stottler ZS, Stroili R, Strube J, Sumihama M, Sumiyoshi T, Summers DJ, Suzuki SY, Tabata M, Takizawa M, Tamponi U, Tanaka S, Tanida K, Taniguchi N, Taras P, Tenchini F, Torassa E, Trabelsi K, Tsuboyama T, Uchida M, Unger K, Unno Y, Uno S, Ushiroda Y, Vahsen SE, van Tonder R, Varner GS, Varvell KE, Vinokurova A, Vitale L, Vossen A, Wakai M, Wakeling HM, Wan Abdullah W, Wang CH, Wang MZ, Warburton A, Watanabe M, Webb J, Wehle S, Wessel C, Wiechczynski J, Windel H, Won E, Yabsley B, Yamada S, Yan W, Yang SB, Ye H, Yin JH, Yonenaga M, Yuan CZ, Yusa Y, Zani L, Zhang Z, Zhilich V, Zhou QD, Zhou XY, and Zhukova VI
Abstract: Theories beyond the standard model often predict the existence of an additional neutral boson, the Z^{'}. Using data collected by the Belle II experiment during 2018 at the SuperKEKB collider, we perform the first searches for the invisible decay of a Z^{'} in the process e^{+}e^{-}→μ^{+}μ^{-}Z^{'} and of a lepton-flavor-violating Z^{'} in e^{+}e^{-}→e^{±}μ^{∓}Z^{'}. We do not find any excess of events and set 90% credibility level upper limits on the cross sections of these processes. We translate the former, in the framework of an L_{μ}-L_{τ} theory, into upper limits on the Z^{'} coupling constant at the level of 5×10^{-2}-1 for M_{Z^{'}}≤6 GeV/c^{2}.
Published: 2020
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327. Observation of the Radiative Decays of ϒ(1S) to χ_{c1}.

Author: Katrenko P, Adachi I, Aihara H, Al Said S, Asner DM, Aushev T, Badhrees I, Bahinipati S, Behera P, Beleño C, Bennett J, Bhardwaj V, Bhuyan B, Biswal J, Bobrov A, Bonvicini G, Bračko M, Campajola M, Cao L, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho HE, Cho K, Choi SK, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Di Capua F, Di Carlo S, Doležal Z, Dong TV, Eidelman S, Epifanov D, Fast JE, Fulsom BG, Garg R, Gaur V, Gabyshev N, Garmash A, Giri A, Goldenzweig P, Golob B, Grzymkowska O, Hartbrich O, Hayasaka K, Hayashii H, Hou WS, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jeon HB, Jia S, Jin Y, Joffe D, Joo KK, Karyan G, Kichimi H, Kim DY, Kim KT, Kim SH, Kinoshita K, Kodyš P, Korpar S, Križan P, Kroeger R, Kuhr T, Lee IS, Lee SC, Lewis P, Li YB, Li Gioi L, Libby J, Lieret K, MacQueen C, Masuda M, Matsuda T, Matvienko D, Merola M, Miyabayashi K, Miyata H, Mizuk R, Mohanty GB, Moon TJ, Mori T, Mussa R, Nakano E, Nakano T, Nakao M, Nayak M, Nisar NK, Nishida S, Nishimura K, Ono H, Onuki Y, Oskin P, Pakhlov P, Pakhlova G, Pang T, Pardi S, Park CW, Park H, Park SH, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Popov V, Prencipe E, Prim MT, Ritter M, Rostomyan A, Rout N, Russo G, Sahoo D, Sakai Y, Sandilya S, Sanuki T, Savinov V, Schneider O, Schnell G, Schueler J, Schwanda C, Seino Y, Senyo K, Sevior ME, Shen CP, Shiu JG, Solovieva E, Starič M, Stottler ZS, Sumiyoshi T, Sutcliffe W, Takizawa M, Tamponi U, Tanida K, Tenchini F, Trabelsi K, Uchida M, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Van Tonder R, Varner G, Vossen A, Wang B, Wang CH, Wang MZ, Wang P, Wang XL, Won E, Yang SB, Ye H, Yelton J, Yin JH, Yuan CZ, Yusa Y, Zhang ZP, Zhilich V, and Zhukova V
Abstract: We report the first observation of the radiative decay of the ϒ(1S) into a charmonium state. The significance of the observed signal of ϒ(1S)→γχ_{c1} is 6.3 standard deviations including systematics. The branching fraction is calculated to be B[ϒ(1S)→γχ_{c1}]=[4.7_{-1.8}^{+2.4}(stat)_{-0.5}^{+0.4}(sys)×10^{-5}]. We also searched for ϒ(1S) radiative decays into χ_{c0,2} and η_{c}(1S,2S), and set upper limits on their branching fractions. These results are obtained from a 24.9 fb^{-1} data sample collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider at a center-of-mass energy equal to the ϒ(2S) mass using ϒ(1S) tagging by the ϒ(2S)→ϒ(1S)π^{+}π^{-} transitions.
Published: 2020
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328. First Measurements of Absolute Branching Fractions of the Ξ_{c}^{0} Baryon at Belle.

Author: Li YB, Shen CP, Yuan CZ, Adachi I, Aihara H, Al Said S, Asner DM, Aushev T, Ayad R, Badhrees I, Ban Y, Bansal V, Beleño C, Berger M, Bhardwaj V, Bhuyan B, Bilka T, Biswal J, Bondar A, Bozek A, Bračko M, Cao L, Červenkov D, Chen A, Cheon BG, Chilikin K, Cho K, Choi SK, Choi Y, Cinabro D, Cunliffe S, Di Carlo S, Doležal Z, Dong TV, Drásal Z, Eidelman S, Fast JE, Fulsom BG, Garg R, Gaur V, Gabyshev N, Garmash A, Giri A, Goldenzweig P, Greenwald D, Grube B, Hayasaka K, Hayashii H, Hsu CL, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jia S, Jin Y, Joffe D, Joo KK, Karyan G, Kawasaki T, Kichimi H, Kim DY, Kim HJ, Kim JB, Kim KT, Kim SH, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Kroeger R, Krokovny P, Kumita T, Kuzmin A, Kwon YJ, Lee JY, Lee SC, Li LK, Li Gioi L, Libby J, Liventsev D, Lubej M, MacNaughton J, Masuda M, Matsuda T, Merola M, Miyabayashi K, Miyata H, Mizuk R, Mohanty GB, Mussa R, Nakano E, Nakao M, Nath KJ, Nayak M, Niiyama M, Nishida S, Ono H, Onuki Y, Pakhlov P, Pakhlova G, Pal B, Pardi S, Park SH, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Popov V, Prencipe E, Russo G, Sakai Y, Salehi M, Sandilya S, Santelj L, Sanuki T, Savinov V, Schneider O, Schnell G, Schueler J, Schwanda C, Schwartz AJ, Seino Y, Senyo K, Sevior ME, Shibata TA, Shiu JG, Shwartz B, Solovieva E, Starič M, Sumihama M, Sumiyoshi T, Sutcliffe W, Takizawa M, Tanida K, Tao Y, Tenchini F, Trabelsi K, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Van Tonder R, Varner G, Wang B, Wang CH, Wang MZ, Wang P, Wang XL, Won E, Yang SB, Ye H, Yelton J, Yin JH, Yusa Y, Zhang ZP, Zhilich V, and Zhukova V
Abstract: We present the first measurements of absolute branching fractions of Ξ_{c}^{0} decays into Ξ^{-}π^{+}, ΛK^{-}π^{+}, and pK^{-}K^{-}π^{+} final states. The measurements are made using a dataset comprising (772±11)×10^{6} BB[over ¯] pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB e^{+}e^{-} collider. We first measure the absolute branching fraction for B^{-}→Λ[over ¯]_{c}^{-}Ξ_{c}^{0} using a missing-mass technique; the result is B(B^{-}→Λ[over ¯]_{c}^{-}Ξ_{c}^{0})=(9.51±2.10±0.88)×10^{-4}. We subsequently measure the product branching fractions B(B^{-}→Λ[over ¯]_{c}^{-}Ξ_{c}^{0})B(Ξ_{c}^{0}→Ξ^{-}π^{+}), B(B^{-}→Λ[over ¯]_{c}^{-}Ξ_{c}^{0})B(Ξ_{c}^{0}→ΛK^{-}π^{+}), and B(B^{-}→Λ[over ¯]_{c}^{-}Ξ_{c}^{0})B(Ξ_{c}^{0}→pK^{-}K^{-}π^{+}) with improved precision. Dividing these product branching fractions by the result for B^{-}→Λ[over ¯]_{c}^{-}Ξ_{c}^{0} yields the following branching fractions: B(Ξ_{c}^{0}→Ξ^{-}π^{+})=(1.80±0.50±0.14)%, B(Ξ_{c}^{0}→ΛK^{-}π^{+})=(1.17±0.37±0.09)%, and B(Ξ_{c}^{0}→pK^{-}K^{-}π^{+})=(0.58±0.23±0.05)%. For the above branching fractions, the first uncertainties are statistical and the second are systematic. Our result for B(Ξ_{c}^{0}→Ξ^{-}π^{+}) can be combined with Ξ_{c}^{0} branching fractions measured relative to Ξ_{c}^{0}→Ξ^{-}π^{+} to yield other absolute Ξ_{c}^{0} branching fractions.
Published: 2019
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329. Observation of Ξ(1620)^{0} and Evidence for Ξ(1690)^{0} in Ξ_{c}^{+}→Ξ^{-}π^{+}π^{+} Decays.

Author: Sumihama M, Adachi I, Ahn JK, Aihara H, Al Said S, Asner DM, Atmacan H, Aushev T, Ayad R, Babu V, Badhrees I, Bahinipati S, Bakich AM, Bansal V, Beleño C, Berger M, Bhardwaj V, Bhuyan B, Bilka T, Biswal J, Bonvicini G, Bozek A, Bračko M, Browder TE, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho K, Choi SK, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Czank T, Dash N, Di Carlo S, Doležal Z, Dong TV, Drásal Z, Eidelman S, Epifanov D, Fast JE, Fulsom BG, 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 WS, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jeon HB, Jia S, Jin Y, Joo KK, Julius T, Kaliyar AB, Kang KH, Karyan G, Kato Y, Kiesling C, Kim DY, Kim JB, Kim KT, Kim SH, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Kroeger R, Krokovny P, Kumar R, Kuzmin A, Kwon YJ, Lange JS, Lee IS, Lee SC, Li LK, Li YB, 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 GB, Moon HK, Mori T, Mussa R, Nakano E, Nakano T, Nakao M, Nanut T, Nath KJ, Natkaniec Z, Niiyama M, Nisar NK, Nishida S, Ono H, Pakhlov P, Pakhlova G, Pal B, Pardi S, Park H, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, 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 ME, Shebalin V, Shen CP, Shibata TA, Shiu JG, Shwartz B, Simon F, Sokolov A, Solovieva E, Starič M, Strube JF, Sumiyoshi T, Takizawa M, Tamponi U, Tanida K, Taniguchi N, Tenchini F, Uchida M, Uglov T, Uno S, Urquijo P, Vahsen SE, Van Hulse C, Varner G, Vorobyev V, Vossen A, Wang B, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe M, Watanuki S, Widmann E, Won E, Ye H, Yelton J, Yuan CZ, Yusa Y, Zakharov S, Zhang ZP, Zhilich V, Zhukova V, and Zhulanov V
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.
Published: 2019
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330. Observation of Transverse Λ/Λ[over ¯] Hyperon Polarization in e^{+}e^{-} Annihilation at Belle.

Author: Guan Y, Vossen A, Adachi I, Adamczyk K, Ahn JK, Aihara H, Al Said S, Asner DM, Atmacan H, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bakich AM, 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 TE, Cao L, Červenkov D, Chang P, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho K, Choi SK, Choi Y, Cinabro D, Cunliffe S, Dash N, Di Carlo S, Dingfelder J, Doležal Z, Dong TV, Drásal Z, Eidelman S, Epifanov D, Fast JE, Ferber T, Fulsom BG, 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 WS, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jaegle I, Jeon HB, Jia S, Jin Y, Joffe D, Joo KK, Julius T, Kang KH, Kawasaki T, Kiesling C, Kim DY, Kim HJ, Kim JB, Kim KT, Kim SH, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Kroeger R, Krokovny P, Kuhr T, Kulasiri R, Kuzmin A, Kwon YJ, Lange JS, Lee IS, Lee SC, Li LK, Li YB, Li Gioi L, Libby J, Liventsev D, Lubej M, Luo T, Masuda M, Matsuda T, Matvienko D, Merola M, Miyata H, Mizuk R, Mohanty GB, Moon HK, Mori T, Mussa R, Nakao M, Nanut T, Nath KJ, Natkaniec Z, Nayak M, Niiyama M, Nisar NK, Nishida S, Ogawa S, Okuno S, Ono H, Pakhlov P, Pakhlova G, Pal B, Pardi S, Park H, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, 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 ME, Shebalin V, Shen CP, Shibata TA, Shiu JG, Simon F, Sokolov A, Solovieva E, Starič M, Strube JF, 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 SE, Van Hulse C, Van Tonder R, Varner G, Vinokurova A, Vorobyev V, Waheed E, Wang B, Wang CH, Wang MZ, Wang P, Wang XL, Watanuki S, Widmann E, Won E, Ye H, Yelton J, Yin JH, Yuan CZ, Yusa Y, Zhang ZP, Zhilich V, Zhukova V, Zhulanov V, and Zupanc A
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.
Published: 2019
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331. Search for a Light CP-odd Higgs Boson and Low-Mass Dark Matter at the Belle Experiment.

Author: Seong IS, Vahsen SE, Adachi I, Aihara H, Al Said S, Asner DM, Aulchenko V, Aushev T, Ayad R, Babu V, Bakich AM, Bansal V, Behera P, Bhardwaj V, Bhuyan B, Bilka T, Biswal J, Bobrov A, Bonvicini G, Bozek A, Bračko M, Browder TE, Cao L, Červenkov D, Chang P, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho K, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Dash N, Di Carlo S, Dingfelder J, Dong TV, Eidelman S, Epifanov D, Fast JE, Frey A, Fulsom BG, 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 MT, Higuchi T, Hou WS, Hsu CL, Huang K, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jeon HB, Jia S, Jin Y, Joffe D, Joo KK, Julius T, Kaliyar AB, Karyan G, Kawasaki T, Kichimi H, Kiesling C, Kim DY, Kim JB, Kim KT, Kim SH, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Kroeger R, Krokovny P, Kuhr T, Kumita T, Kuzmin A, Kwon YJ, Lange JS, Lee IS, Lee SC, Li LK, Li YB, 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 GB, Mori T, Mussa R, Nakano E, Nakao M, Nanut T, Nath KJ, Nayak M, Niiyama M, Nisar NK, Nishida S, Nishimura K, Ogawa S, Ono H, Ostrowicz W, Pakhlov P, Pakhlova G, Pal B, Park H, Pedlar TK, Pestotnik R, Piilonen LE, 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 ME, Shen CP, Shibata TA, Shiu JG, 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 CH, Wang P, Watanabe M, Watanuki S, Widmann E, Won E, Yamamoto H, Ye H, Yelton J, Yuan CZ, Yusa Y, Zakharov S, Zhang ZP, Zhilich V, Zhukova V, Zhulanov V, and Zupanc A
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}.
Published: 2019
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332. First Evidence for cos2β>0 and Resolution of the Cabibbo-Kobayashi-Maskawa Quark-Mixing Unitarity Triangle Ambiguity.

Author: Adachi I, Adye T, Ahmed H, Ahn JK, Aihara H, Akar S, Alam MS, Albert J, Anulli F, Arnaud N, Asner DM, Aston D, Atmacan H, Aushev T, Ayad R, Babu V, Badhrees I, Bakich AM, Banerjee S, Bansal V, Barlow RJ, Batignani G, Beaulieu A, Behera P, Bellis M, Ben-Haim E, Bernard D, Bernlochner FU, Bettarini S, Bettoni D, Bevan AJ, Bhardwaj V, Bhuyan B, Bianchi F, Biasini M, Biswal J, Blinov VE, Bomben M, Bondar A, Bonneaud GR, Bozek A, Bozzi C, Bračko M, Browder TE, Brown DN, Brown DN, Bünger C, Burchat PR, Buzykaev AR, Calabrese R, Calcaterra A, Calderini G, Di Carlo S, Carpinelli M, Cartaro C, Casarosa G, Cenci R, Chao DS, Chauveau J, Cheaib R, Chen A, Chen C, Cheng CH, Cheon BG, Chilikin K, Cho K, Choi Y, Choudhury S, Chrzaszcz M, Cibinetto G, Cinabro D, Cochran J, Coleman JP, Convery MR, Cowan G, Cowan R, Cremaldi L, Cunliffe S, Dash N, Davier M, Davis CL, De Mori F, De Nardo G, Denig AG, de Sangro R, Dey B, Di Lodovico F, Dittrich S, Doležal Z, Dorfan J, Drásal Z, Druzhinin VP, Dunwoodie W, Ebert M, Echenard B, Eidelman S, Eigen G, Eisner AM, Emery S, Epifanov D, Ernst JA, Faccini R, Fast JE, Feindt M, Ferber T, Ferrarotto F, Ferroni F, Field RC, Filippi A, Finocchiaro G, Fioravanti E, Flood KT, Forti F, Fritsch M, Fulsom BG, Gabathuler E, Gamba D, Garg R, Garmash A, Gary JW, Garzia I, Gaur V, Gaz A, Gelb M, Gershon TJ, Li Gioi L, Giorgi MA, Giri A, Godang R, Goldenzweig P, Golob B, Golubev VB, Gorodeisky R, Gradl W, Graham MT, Grauges E, Griessinger K, Gritsan AV, Grünberg O, Guan Y, Guido E, Guttman N, Haba J, Hafner A, Hara T, Harrison PF, Hast C, Hayasaka K, Hayashii H, Hearty C, Heck M, Hedges MT, Heß M, Hirose S, Hitlin DG, Honscheid K, Hou WS, Hsu CL, Huard Z, Van Hulse C, Hutchcroft DE, Inami K, Inguglia G, Innes WR, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Izen JM, Jacobs WW, Jawahery A, Jessop CP, Jia S, Jin Y, Joo KK, Julius T, Kaliyar AB, Kang KH, Karyan G, Kass R, Kichimi H, Kim DY, Kim JB, Kim KT, Kim SH, Kim J, Kim P, King GJ, Kinoshita K, Koch H, Kodyš P, Kolomensky YG, Korpar S, Kotchetkov D, Kowalewski R, Kravchenko EA, Križan P, Kroeger R, Krokovny P, Kuhr T, Kulasiri R, Kumita T, Kuzmin A, Kwon YJ, Lacker HM, Lafferty GD, Lanceri L, Lange JS, Lange DJ, Lankford AJ, Latham TE, Leddig T, Le Diberder F, Lee IS, Lee SC, Lees JP, Leith DWGS, Li LK, Li YB, Li Y, Libby J, Liventsev D, Lockman WS, Long O, LoSecco JM, Lou XC, Lubej M, Lueck T, Luitz S, Luo T, Luppi E, Lusiani A, Lutz AM, MacFarlane DB, MacNaughton J, Mallik U, Manoni E, Marchiori G, Margoni M, Martellotti S, Martinez-Vidal F, Masuda M, Matsuda T, Mattison TS, Matvienko D, McKenna JA, Meadows BT, Merola M, Miyabayashi K, Miyashita TS, Miyata H, Mizuk R, Mohanty GB, Moon HK, Mori T, Muller DR, Müller T, Mussa R, Nakano E, Nakao M, Nanut T, Nath KJ, Nayak M, Neal H, Neri N, Nisar NK, Nishida S, Nugent IM, Oberhof B, Ocariz J, Ogawa S, Ongmongkolkul P, Ono H, Onuchin AP, Onuki Y, Oyanguren A, Pakhlov P, Pakhlova G, Pal B, Palano A, Palombo F, Panduro Vazquez W, Paoloni E, Pardi S, Park H, Passaggio S, Patrignani C, Patteri P, Paul S, Pavelkin I, Payne DJ, Pedlar TK, Peimer DR, Peruzzi IM, Pestotnik R, Piccolo M, Piilonen LE, Pilloni A, Piredda G, Poireau V, Popov V, Porter FC, Posocco M, Prell S, Prepost R, Puccio EMT, Purohit MV, Pushpawela BG, Rama M, Randle-Conde A, Ratcliff BN, Raven G, Resmi PK, Ritchie JL, Ritter M, Rizzo G, Roberts DA, Robertson SH, Röhrken M, Roney JM, Roodman A, Rossi A, Rotondo M, Rozanska M, Russo G, Sacco R, Al Said S, Sakai Y, Salehi M, Sandilya S, Santelj L, Santoro V, Sanuki T, Savinov V, Schneider O, Schnell G, Schroeder T, Schubert KR, Schwanda C, Schwartz AJ, Schwitters RF, Sciacca C, Seddon RM, Seino Y, Sekula SJ, Senyo K, Seon O, Serednyakov SI, Sevior ME, Shebalin V, Shen CP, Shibata TA, Shimizu N, Shiu JG, Simi G, Simon F, Simonetto F, Skovpen YI, Smith JG, Smith AJS, So RY, Sobie RJ, Soffer A, Sokoloff MD, Solodov EP, Solovieva E, Spanier SM, Starič M, Stroili R, Sullivan MK, Sumisawa K, Sumiyoshi T, Summers DJ, Sun L, Takizawa M, Tamponi U, Tanida K, Taras P, Tasneem N, Tenchini F, Tisserand V, Todyshevx KY, Touramanis C, Uchida M, Uglov T, Unno Y, Uno S, Vahsen SE, Varner G, Vasseur G, Va'vra J, Červenkov D, Verderi M, Vitale L, Vorobyev V, Voß C, Wagner SR, Waheed E, Waldi R, Walsh JJ, Wang B, Wang CH, Wang MZ, Wang P, Watanabe Y, Wilson FF, Wilson JR, Wisniewski WJ, Won E, Wormser G, Wright DM, Wu SL, Ye H, Yuan CZ, Yusa Y, Zakharov S, Zallo A, Zani L, Zhang ZP, Zhilich V, Zhukova V, Zhulanov V, and Zupanc A
Abstract: We present first evidence that the cosine of the CP-violating weak phase 2β is positive, and hence exclude trigonometric multifold solutions of the Cabibbo-Kobayashi-Maskawa (CKM) Unitarity Triangle using a time-dependent Dalitz plot analysis of B^{0}→D^{(*)}h^{0} with D→K_{S}^{0}π^{+}π^{-} decays, where h^{0}∈{π^{0},η,ω} denotes a light unflavored and neutral hadron. The measurement is performed combining the final data sets of the BABAR and Belle experiments collected at the ϒ(4S) resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471±3)×10^{6}BB[over ¯] pairs recorded by the BABAR detector and (772±11)×10^{6}BB[over ¯] pairs recorded by the Belle detector. The results of the measurement are sin2β=0.80±0.14(stat)±0.06(syst)±0.03(model) and cos2β=0.91±0.22(stat)±0.09(syst)±0.07(model). The result for the direct measurement of the angle β of the CKM Unitarity Triangle is β=[22.5±4.4(stat)±1.2(syst)±0.6(model)]°. The measurement assumes no direct CP violation in B^{0}→D^{(*)}h^{0} decays. The quoted model uncertainties are due to the composition of the D^{0}→K_{S}^{0}π^{+}π^{-} decay amplitude model, which is newly established by performing a Dalitz plot amplitude analysis using a high-statistics e^{+}e^{-}→cc[over ¯] data sample. CP violation is observed in B^{0}→D^{(*)}h^{0} decays at the level of 5.1 standard deviations. The significance for cos2β>0 is 3.7 standard deviations. The trigonometric multifold solution π/2-β=(68.1±0.7)° is excluded at the level of 7.3 standard deviations. The measurement resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle.
Published: 2018
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333. Observation of ϒ(2S)→γη_{b}(1S) Decay.

Author: Fulsom BG, Pedlar TK, Adachi I, Aihara H, Al Said S, Asner DM, Atmacan H, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bakich AM, 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 TE, Cao L, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho K, Choi SK, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Dash N, Di Carlo S, Dingfelder J, Doležal Z, Dong TV, Drásal Z, Eidelman S, Epifanov D, Fast JE, 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 WS, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jeon HB, Jia S, Jin Y, Joffe D, Joo KK, Julius T, Kawasaki T, Kichimi H, Kiesling C, Kim DY, Kim HJ, Kim JB, Kim KT, Kim SH, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Kroeger R, Krokovny P, Kuhr T, Kulasiri R, Kuzmin A, Kwon YJ, Lange JS, Lee IS, Lee SC, Li LK, Li YB, 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 GB, Moon HK, Mori T, Mussa R, Nakao M, Nanut T, Nath KJ, Natkaniec Z, Nayak M, Niiyama M, Nisar NK, Nishida S, Ogawa S, Okuno S, Ono H, Pakhlov P, Pakhlova G, Pal B, Pardi S, Park H, Paul S, Pestotnik R, Piilonen LE, 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 ME, Shebalin V, Shen CP, Shibata TA, Shiu JG, Shwartz B, Simon F, Singh JB, Sokolov A, Solovieva E, Starič M, Strube JF, 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 SE, Van Hulse C, Van Tonder R, Varner G, Vinokurova A, Vorobyev V, Vossen A, Wang B, Wang CH, Wang P, Wang XL, Watanabe M, Watanuki S, Widmann E, Won E, Ye H, Yin JH, Yuan CZ, Zhang ZP, Zhilich V, Zhukova V, Zhulanov V, and Zupanc A
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.
Published: 2018
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334. Observation of ϒ(4S)→η^{'}ϒ(1S).

Author: Guido E, Mussa R, Tamponi U, Aihara H, Al Said S, Asner DM, Atmacan H, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bakich AM, Bansal V, Behera P, Berger M, Bhardwaj V, Biswal J, Bondar A, Bonvicini G, Bozek A, Bračko M, Browder TE, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho K, Choi SK, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Di Carlo S, Doležal Z, Eidelman S, Epifanov D, Fast JE, Ferber T, Fulsom BG, Garg R, Gaur V, Gabyshev N, Garmash A, Gelb M, Giri A, Goldenzweig P, Haba J, Hara T, Hayashii H, Hedges MT, Hou WS, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jeon HB, Jia S, Jin Y, Julius T, Kang KH, Karyan G, Kawasaki T, Kiesling C, Kim DY, Kim JB, Kim KT, Kim SH, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Kroeger R, Krokovny P, Kulasiri R, Kumar R, Kumita T, Kuzmin A, Kwon YJ, Lee IS, Lee SC, Li LK, Li YB, 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 GB, Moon HK, Mori T, Nakano E, Nakao M, Nanut T, Nath KJ, Nayak M, Niiyama M, Nishida S, Ogawa S, Ono H, Ostrowicz W, Pakhlova G, Pal B, Pardi S, Park CW, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Popov V, Rostomyan A, Russo G, Sakai Y, Salehi M, Sanuki T, Schneider O, Schnell G, Schwanda C, Seino Y, Shebalin V, Shen CP, Shibata TA, Shiu JG, Shwartz B, Sokolov A, Starič M, Strube JF, 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 CH, Wang MZ, Wang P, Wang XL, Watanabe M, Watanabe Y, Widmann E, Won E, Ye H, Yelton J, Yuan CZ, Yusa Y, Zakharov S, Zhang ZP, Zhilich V, Zhukova V, and Zhulanov V
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.
Published: 2018
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335. Observation of an Excited Ω^{-} Baryon.

Author: Yelton J, Adachi I, Ahn JK, Aihara H, Al Said S, Asner DM, Atmacan H, Aushev T, Ayad R, Babu V, Badhrees I, Bahinipati S, Bakich AM, Bansal V, Beleño C, Berger M, Bhardwaj V, Bhuyan B, Bilka T, Biswal J, Bondar A, Bonvicini G, Bozek A, Bračko M, Browder TE, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho K, Choi SK, Choi Y, Choudhury S, Cinabro D, Cunliffe S, Czank T, Dash N, Di Carlo S, Doležal Z, Dong TV, Drásal Z, Eidelman S, Epifanov D, Fast JE, Fulsom BG, 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 WS, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jeon HB, Jia S, Jin Y, Joo KK, Julius T, Kaliyar AB, Kang KH, Karyan G, Kato Y, Kiesling C, Kim DY, Kim JB, Kim KT, Kim SH, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Kroeger R, Krokovny P, Kuhr T, Kumar R, Kuzmin A, Kwon YJ, Lange JS, Lee IS, Lee SC, Li LK, Li YB, Li Gioi L, Libby J, Liventsev D, Lubej M, Luo T, Masuda M, Matsuda T, Matvienko D, McNeil JT, Merola M, Miyabayashi K, Miyata H, Mizuk R, Mohanty GB, Moon HK, Mori T, Mussa R, Nakano E, Nakao M, Nanut T, Nath KJ, Natkaniec Z, Niiyama M, Nisar NK, Nishida S, Ono H, Pakhlov P, Pakhlova G, Pal B, Pardi S, Park H, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, 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 ME, Shebalin V, Shen CP, Shibata TA, Shiu JG, Shwartz B, Simon F, Sokolov A, Solovieva E, Starič M, Strube JF, 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 SE, Van Hulse C, Varner G, Vorobyev V, Vossen A, Wang B, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe M, Watanuki S, Widmann E, Won E, Ye H, Yuan CZ, Yusa Y, Zakharov S, Zhang ZP, Zhilich V, Zhukova V, and Zhulanov V
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.
Published: 2018
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336. Search for B^{-}→μ^{-}ν[over ¯]_{μ} Decays at the Belle Experiment.

Author: Sibidanov A, Varvell KE, Adachi I, Aihara H, Al Said S, Asner DM, Aushev T, Ayad R, Babu V, Badhrees I, Bahinipati S, Bakich AM, Bansal V, Barberio E, Behera P, Bhuyan B, Biswal J, Bozek A, Bračko M, Browder TE, Červenkov D, Chang P, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho K, Choi SK, Choi Y, Cinabro D, Czank T, Dash N, Di Carlo S, Doležal Z, Drásal Z, Dutta D, Eidelman S, Epifanov D, Fast JE, Ferber T, Fulsom BG, Gaur V, Gabyshev N, Garmash A, Goldenzweig P, Greenwald D, Guan Y, Guido E, Haba J, Hayasaka K, Hayashii H, Hedges MT, Hirose S, Hou WS, Hsu CL, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs WW, Jaegle I, Jeon HB, Jin Y, Joo KK, Julius T, Kahn J, Kaliyar AB, Kang KH, Karyan G, Kawasaki T, Kiesling C, Kim DY, Kim JB, Kim SH, Kim YJ, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Krokovny P, Kuhr T, Kulasiri R, Kumar R, Kuzmin A, Kwon YJ, Lange JS, Lee IS, Li CH, 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 GB, Moon HK, Mori T, Mussa R, Nakano E, Nakao M, Nanut T, Nath KJ, Natkaniec Z, Nayak M, Niiyama M, Nisar NK, Nishida S, Ogawa S, Okuno S, Ono H, Pakhlov P, Pakhlova G, Pal B, Park CS, Park CW, Park H, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, 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 ME, Shebalin V, Shen CP, Shibata TA, Shiu JG, Simon F, Sokolov A, Solovieva E, Starič M, Strube JF, 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 CH, Wang MZ, Wang P, Watanabe M, Watanuki S, Widmann E, Won E, Yamashita Y, Ye H, Yelton J, Yuan CZ, Yusa Y, Zhang ZP, Zhilich V, Zhukova V, Zhulanov V, and Zupanc A
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}.
Published: 2018
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337. Evidence for Isospin Violation and Measurement of CP Asymmetries in B→K^{*}(892)γ.

Author: Horiguchi T, Ishikawa A, Yamamoto H, Adachi I, Aihara H, Al Said S, Asner DM, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bakich AM, Bansal V, Behera P, Bhardwaj V, Bhuyan B, Biswal J, Bobrov A, Bonvicini G, Bozek A, Bračko M, Browder TE, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho K, Choi Y, Cinabro D, Czank T, Dash N, Di Carlo S, Doležal Z, Drásal Z, Dutta D, Eidelman S, Epifanov D, Farhat H, Fast JE, Ferber T, Fulsom BG, Gaur V, Gabyshev N, Garmash A, Gelb M, Gillard R, Goldenzweig P, Golob B, Guan Y, Guido E, Haba J, Hara T, Hayasaka K, Hayashii H, Hedges MT, Higuchi T, Hirose S, Hou WS, Iijima T, Inami K, Inguglia G, Itoh R, Iwasaki Y, Jacobs WW, Jaegle I, Jeon HB, Jia S, Jin Y, Joffe D, Joo KK, Julius T, Kang KH, Kawasaki T, Kim DY, Kim JB, Kim KT, Kim MJ, Kim SH, Kim YJ, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Krokovny P, Kuhr T, Kulasiri R, Kumar R, Kumita T, Kuzmin A, Kwon YJ, Lange JS, Li CH, Li L, 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 GB, Mohanty S, Moon HK, Mori T, Mussa R, Nakano E, Nakao M, Nanut T, Nath KJ, Natkaniec Z, Nayak M, Nisar NK, Nishida S, Ogawa S, Okuno S, Ono H, Pakhlov P, Pakhlova G, Pal B, Pardi S, Park CS, Park H, Paul S, Pedlar TK, Pestotnik R, Piilonen LE, Prasanth K, Pulvermacher C, Rauch J, Rostomyan A, Sakai Y, Sandilya S, Santelj L, Savinov V, Schneider O, Schnell G, Schwanda C, Schwartz AJ, Seino Y, Senyo K, Seong IS, Sevior ME, Shebalin V, Shen CP, Shibata TA, Shiu JG, Simon F, Sokolov A, Solovieva E, Starič M, Strube JF, Sumisawa K, Sumiyoshi T, Takizawa M, Tamponi U, Tanida K, Tenchini F, Trabelsi K, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Van Hulse C, Varner G, Vinokurova A, Vorobyev V, Vossen A, Wang CH, Wang MZ, Wang P, Watanabe Y, Watanuki S, Weber T, Widmann E, Won E, Yamashita Y, Ye H, Zhang ZP, Zhilich V, Zhukova V, Zhulanov V, and Zupanc A
Abstract: We report the first evidence for isospin violation in B→K^{*}γ and the first measurement of the difference of CP asymmetries between B^{+}→K^{*+}γ and B^{0}→K^{*0}γ. This analysis is based on the data sample containing 772×10^{6}BB[over ¯] pairs that was collected with the Belle detector at the KEKB energy-asymmetric e^{+}e^{-} collider. We find evidence for the isospin violation with a significance of 3.1σ, Δ_{0+}=[+6.2±1.5(stat)±0.6(syst)±1.2(f_{+-}/f_{00})]%, where the third uncertainty is due to the uncertainty on the fraction of B^{+}B^{-} to B^{0}B[over ¯]^{0} production in ϒ(4S) decays. The measured value is consistent with predictions of the standard model. The result for the difference of CP asymmetries is ΔA_{CP}=[+2.4±2.8(stat)±0.5(syst)]%, consistent with zero. The measured branching fractions and CP asymmetries for charged and neutral B meson decays are the most precise to date. We also calculate the ratio of branching fractions of B^{0}→K^{*0}γ to B_{s}^{0}→ϕγ.
Published: 2017
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338. Search for CP Violation and Measurement of the Branching Fraction in the Decay D^{0}→K_{S}^{0}K_{S}^{0}.

Author: Dash N, Bahinipati S, Bhardwaj V, Trabelsi K, Adachi I, Aihara H, Al Said S, Asner DM, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bakich AM, Bansal V, Barberio E, Bhuyan B, Biswal J, Bobrov A, Bondar A, Bonvicini G, Bozek A, Bračko M, Breibeck F, Browder TE, Červenkov D, Chang MC, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho K, Choi Y, Cinabro D, Di Carlo S, Doležal Z, Drásal Z, Dutta D, Eidelman S, Epifanov D, Farhat H, Fast JE, Ferber T, Fulsom BG, Gaur V, Gabyshev N, Garmash A, Gillard R, Goldenzweig P, Haba J, Hara T, Hayasaka K, Hayashii H, Hedges MT, Hou WS, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki Y, Jacobs WW, Jaegle I, Jeon HB, Jin Y, Joffe D, Joo KK, Julius T, Kahn J, Kaliyar AB, Karyan G, Katrenko P, Kawasaki T, Kiesling C, Kim DY, Kim HJ, Kim JB, Kim KT, Kim MJ, Kim SH, Kim YJ, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Krokovny P, Kuhr T, Kulasiri R, Kumar R, Kumita T, Kuzmin A, Kwon YJ, Lange JS, Lee IS, Li CH, Li L, Li Y, Li Gioi L, Libby J, Liventsev D, Lubej M, Luo T, Masuda M, Matvienko D, Merola M, Miyabayashi K, Miyata H, Mizuk R, Mohanty GB, Mohanty S, Moon HK, Mori T, Mussa R, Nakano E, Nakao M, Nanut T, Nath KJ, Natkaniec Z, Nayak M, Niiyama M, Nisar NK, Nishida S, Ogawa S, Okuno S, Ono H, Pakhlov P, Pakhlova G, Pal B, Pardi S, Park CS, Park H, Paul S, Pedlar TK, Pesántez L, Pestotnik R, Piilonen LE, Prasanth K, Ritter M, Rostomyan A, Sahoo H, Sakai Y, Sandilya S, Santelj L, Sanuki T, Sato Y, Savinov V, Schneider O, Schnell G, Schwanda C, Schwartz AJ, Seino Y, Senyo K, Sevior ME, Shebalin V, Shen CP, Shibata TA, Shiu JG, Shwartz B, Simon F, Sokolov A, Solovieva E, Starič M, Strube JF, Stypula J, Sumisawa K, Sumiyoshi T, Takizawa M, Tamponi U, Tanida K, Tenchini F, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Van Hulse C, Varner G, Vorobyev V, Vossen A, Waheed E, Wang CH, Wang MZ, Wang P, Watanabe M, Watanabe Y, Widmann E, Williams KM, Won E, Yamashita Y, Ye H, Yelton J, Yook Y, Yuan CZ, Yusa Y, Zhang ZP, Zhilich V, Zhukova V, Zhulanov V, and Zupanc A
Abstract: We report a study of the decay D^{0}→K_{S}^{0}K_{S}^{0} using 921 fb^{-1} of data collected at or near the ϒ(4S) and ϒ(5S) resonances with the Belle detector at the KEKB asymmetric energy e^{+}e^{-} collider. The measured time-integrated CP asymmetry is A_{CP}(D^{0}→K_{S}^{0}K_{S}^{0})=(-0.02±1.53±0.02±0.17)%, and the branching fraction is B(D^{0}→K_{S}^{0}K_{S}^{0})=(1.321±0.023±0.036±0.044)×10^{-4}, where the first uncertainty is statistical, the second is systematic, and the third is due to the normalization mode (D^{0}→K_{S}^{0}π^{0}). These results are significantly more precise than previous measurements available for this mode. The A_{CP} measurement is consistent with the standard model expectation.
Published: 2017
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339. Measurement of the τ Lepton Polarization and R(D^{}) in the Decay B[over ¯]→D^{}τ^{-}ν[over ¯]_{τ}.

Author: Hirose S, Iijima T, Adachi I, Adamczyk K, Aihara H, Al Said S, Asner DM, Atmacan H, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bakich AM, Bansal V, Barberio E, Behera P, Berger M, Bhuyan B, Biswal J, Bondar A, Bonvicini G, Bozek A, Bračko M, Browder TE, Červenkov D, Chang P, Chen A, Cheon BG, Chilikin K, Chistov R, Cho K, Choi Y, Cinabro D, Danilov M, Dash N, Di Carlo S, Dingfelder J, Doležal Z, Drásal Z, Dutta D, Eidelman S, Epifanov D, Farhat H, Fast JE, Ferber T, Fulsom BG, Gaur V, Gabyshev N, Garmash A, Goldenzweig P, Golob B, Greenwald D, Grygier J, Haba J, Hara K, Hasenbusch J, Hayasaka K, Hayashii H, Higuchi T, Hou WS, Hsu CL, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki Y, Jacobs WW, Jaegle I, Jin Y, Joffe D, Joo KK, Julius T, Kato Y, Kawasaki T, Kichimi H, Kiesling C, Kim DY, Kim JB, Kim KT, Kim MJ, Kim SH, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Križan P, Krokovny P, Kuhr T, Kulasiri R, Kumar R, Kwon YJ, Lange JS, Li CH, Li L, Li Y, Li Gioi L, Libby J, Liventsev D, Lubej M, Luo T, MacNaughton J, Masuda M, Matsuda T, Matvienko D, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohanty GB, Moon HK, Mori T, Mussa R, Nakao M, Nanut T, Nath KJ, Natkaniec Z, Nayak M, Niiyama M, Nisar NK, Nishida S, Ogawa S, Okuno S, Ono H, Onuki Y, Ostrowicz W, Pakhlov P, Pakhlova G, Pal B, Park CW, Park H, Paul S, Pesántez L, Pestotnik R, Piilonen LE, Prasanth K, Ritter M, Rostomyan A, Rozanska M, Sakai Y, Sandilya S, Santelj L, Sanuki T, Sato Y, Savinov V, Schlüter T, Schneider O, Schnell G, Schwanda C, Seino Y, Senyo K, Seon O, Sevior ME, Shebalin V, Shen CP, Shibata TA, Shiu JG, Simon F, Sokolov A, Solovieva E, Starič M, Strube JF, Sumisawa K, Sumiyoshi T, Takizawa M, Tamponi U, Tenchini F, Trabelsi K, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Van Hulse C, Varner G, Varvell KE, Vossen A, Wang CH, Wang MZ, Wang P, Watanabe M, Watanabe Y, Widmann E, Won E, Yamashita Y, Ye H, Yelton J, Yuan CZ, Zhang ZP, Zhilich V, Zhulanov V, and Zupanc A
Abstract: We report the first measurement of the τ lepton polarization P_{τ}(D^{*}) in the decay B[over ¯]→D^{*}τ^{-}ν[over ¯]_{τ} as well as a new measurement of the ratio of the branching fractions 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, and the τ is reconstructed in the modes τ^{-}→π^{-}ν_{τ} and τ^{-}→ρ^{-}ν_{τ}. We use the full data sample of 772×10^{6} BB[over ¯] pairs recorded with the Belle detector at the KEKB electron-positron collider. Our results, P_{τ}(D^{*})=-0.38±0.51(stat)_{-0.16}^{+0.21}(syst) and R(D^{*})=0.270±0.035(stat)_{-0.025}^{+0.028}(syst), are consistent with the theoretical predictions of the standard model.
Published: 2017
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340. Lepton-Flavor-Dependent Angular Analysis of B→K^{*}ℓ^{+}ℓ^{-}.

Author: Wehle S, Niebuhr C, Yashchenko S, Adachi I, Aihara H, Al Said S, Asner DM, Aulchenko V, Aushev T, Ayad R, Aziz T, Babu V, Bakich AM, Bansal V, Barberio E, Bartel W, Behera P, Bhuyan B, Biswal J, Bobrov A, Bondar A, Bonvicini G, Bozek A, Bračko M, Browder TE, Červenkov D, Chang P, Chekelian V, Chen A, Cheon BG, Chilikin K, Chistov R, Cho K, Choi Y, Cinabro D, Dash N, Dingfelder J, Doležal Z, Drásal Z, Dutta D, Eidelman S, Epifanov D, Farhat H, Fast JE, Ferber T, Fulsom BG, Gaur V, Gabyshev N, Garmash A, Gillard R, Goldenzweig P, Golob B, Grzymkowska O, Guido E, Haba J, Hara T, Hayasaka K, Hayashii H, Hedges MT, Hou WS, Hsu CL, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki Y, Jacobs WW, Jaegle I, Jeon HB, Jin Y, Joffe D, Joo KK, Julius T, Kaliyar AB, Kang KH, Karyan G, Katrenko P, Kawasaki T, Kichimi H, Kiesling C, Kim DY, Kim HJ, Kim JB, Kim KT, Kim MJ, Kim SH, Kinoshita K, Koch L, Kodyš P, Korpar S, Kotchetkov D, Križan P, Krokovny P, Kuhr T, Kulasiri R, Kumita T, Kuzmin A, Kwon YJ, Lange JS, Li CH, Li L, Li Y, Li Gioi L, Libby J, Liventsev D, Lubej M, Luo T, Masuda M, Matsuda T, Miyabayashi K, Miyake H, Mizuk R, Mohanty GB, Mori T, Mussa R, Nakano E, Nakao M, Nanut T, Nath KJ, Natkaniec Z, Nayak M, Nisar NK, Nishida S, Ogawa S, Ono H, Onuki Y, Pakhlova G, Pal B, Park CS, Park CW, Park H, Paul S, Pesántez L, Piilonen LE, Pulvermacher C, Rauch J, Ritter M, Rostomyan A, Sakai Y, Sandilya S, Santelj L, Sanuki T, Sato Y, Savinov V, Schlüter T, Schneider O, Schnell G, Schwanda C, Schwartz AJ, Seino Y, Senyo K, Seon O, Seong IS, Sevior ME, Shen CP, Shibata TA, Shiu JG, Shwartz B, Simon F, Sinha R, Solovieva E, Starič M, Strube JF, Sumisawa K, Sumiyoshi T, Takizawa M, Tamponi U, Tenchini F, Trabelsi K, Tsuboyama T, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Vahsen SE, Van Hulse C, Varner G, Varvell KE, Vorobyev V, Vossen A, Waheed E, Wang CH, Wang MZ, Wang P, Watanabe M, Watanabe Y, Widmann E, Williams KM, Won E, Yamamoto H, Yamashita Y, Ye H, Yook Y, Yuan CZ, Yusa Y, Zhang ZP, Zhilich V, Zhukova V, Zhulanov V, Ziegler M, and Zupanc A
Abstract: We present a measurement of angular observables and a test of lepton flavor universality in the B→K^{*}ℓ^{+}ℓ^{-} decay, where ℓ is either e or μ. The analysis is performed on a data sample corresponding to an integrated luminosity of 711 fb^{-1} containing 772×10^{6} BB[over ¯] pairs, collected at the ϒ(4S) resonance with the Belle detector at the asymmetric-energy e^{+}e^{-} collider KEKB. The result is consistent with standard model (SM) expectations, where the largest discrepancy from a SM prediction is observed in the muon modes with a local significance of 2.6σ.
Published: 2017
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341. Observation of D^{0}→ρ^{0}γ and Search for CP Violation in Radiative Charm Decays.

Author: Nanut T, Zupanc A, Adachi I, Aihara H, Al Said S, Asner DM, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bakich AM, Bansal V, Behera P, Bhardwaj V, Biswal J, Bondar A, Bozek A, Bračko M, Browder TE, Červenkov D, Chekelian V, Chen A, Cheon BG, Chistov R, Cho K, Choi SK, Choi Y, Cinabro D, Dash N, Di Carlo S, Doležal Z, Dutta D, Eidelman S, Farhat H, Fast JE, Ferber T, Fulsom BG, Gaur V, Gabyshev N, Garmash A, Gillard R, Goldenzweig P, Golob B, Hayasaka K, Hayashii H, Hou WS, Iijima T, Inami K, Inguglia G, Ishikawa A, Iwasaki Y, Jacobs WW, Jaegle I, Joffe D, Joo KK, Julius T, Kaliyar AB, Kang KH, Kawasaki T, Kim DY, Kim JB, Kim KT, Kim MJ, Kim SH, Kinoshita K, Kodyš P, Korpar S, Krokovny P, Kuhr T, Kulasiri R, Kuzmin A, Kwon YJ, Lange JS, Lee IS, Li CH, Li L, Li Y, Li Gioi L, Libby J, Liventsev D, Lubej M, Masuda M, Matsuda T, Matvienko D, Miyabayashi K, Miyata H, Mizuk R, Mohanty GB, Moon HK, Nakao M, Nath KJ, Nayak M, Nisar NK, Nishida S, Ogawa S, Okuno S, Pakhlov P, Pakhlova G, Pal B, Park CS, Park CW, Park H, Paul S, Pedlar TK, Pesántez L, Pestotnik R, Petrič M, Piilonen LE, Prasanth K, Pulvermacher C, Rauch J, Ritter M, Rostomyan A, Sakai Y, Sandilya S, Santelj L, Sanuki T, Sato Y, Savinov V, Schlüter T, Schneider O, Schnell G, Schwanda C, Schwartz AJ, Seino Y, Senyo K, Seon O, Sevior ME, Shebalin V, Shen CP, Shibata TA, Shiu JG, Shwartz B, Solovieva E, Stanič S, Starič M, Strube JF, Stypula J, Sumiyoshi T, Takizawa M, Tamponi U, Tenchini F, Trabelsi K, Uchida M, Uno S, Ushiroda Y, Varner G, Vinokurova A, Vorobyev V, Vossen A, Wang CH, Wang MZ, Wang P, Watanabe Y, Widmann E, Won E, Yamaoka J, Yamashita Y, Yelton J, Zhang ZP, Zhilich V, Zhukova V, and Zhulanov V
Abstract: We report the first observation of the radiative charm decay D^{0}→ρ^{0}γ and the first search for CP violation in decays D^{0}→ρ^{0}γ, ϕγ, and K[over ¯]^{*0}(892)γ, using a data sample of 943 fb^{-1} collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. The branching fraction is measured to be B(D^{0}→ρ^{0}γ)=(1.77±0.30±0.07)×10^{-5}, where the first uncertainty is statistical and the second is systematic. The obtained CP asymmetries A_{CP}(D^{0}→ρ^{0}γ)=+0.056±0.152±0.006, A_{CP}(D^{0}→ϕγ)=-0.094±0.066±0.001, and A_{CP}(D^{0}→K[over ¯]^{*0}γ)=-0.003±0.020±0.000 are consistent with no CP violation. We also present an improved measurement of the branching fractions B(D^{0}→ϕγ)=(2.76±0.19±0.10)×10^{-5} and B(D^{0}→K[over ¯]^{*0}γ)=(4.66±0.21±0.21)×10^{-4}.
Published: 2017
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342. Energy Scan of the e^{+}e^{-}→h_{b}(nP)π^{+}π^{-} (n=1, 2) Cross Sections and Evidence for ϒ(11020) Decays into Charged Bottomoniumlike States.

Author: Mizuk R, Bondar A, Adachi I, Aihara H, Asner DM, Atmacan H, Aulchenko V, Aushev T, Ayad R, Badhrees I, Bakich AM, Barberio E, Behera P, Bhardwaj V, Bhuyan B, Biswal J, Bobrov A, Bonvicini G, Bozek A, Bračko M, Browder TE, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Chistov R, Chobanova V, Choi SK, Choi Y, Cinabro D, Dalseno J, Danilov M, Dash N, Doležal Z, Drutskoy A, Eidelman S, Epifanov D, Ferber T, Fulsom BG, Gaur V, Garmash A, Gillard R, Goh YM, Goldenzweig P, Golob B, Greenwald D, Hara T, Hayasaka K, Hayashii H, Hou WS, Hsu CL, Inami K, Inguglia G, Ishikawa A, Iwasaki Y, Jaegle I, Julius T, Kang KH, Katrenko P, Kim DY, Kim HJ, Kim JB, Kim KT, Kim MJ, Kim SH, Kim YJ, Kinoshita K, Kodyš P, Korpar S, Kotchetkov D, Krokovny P, Kuhr T, Kuzmin A, Kwon YJ, Lange JS, Li CH, Li H, Li L, Li Gioi L, Libby J, Liventsev D, Lubej M, Luo T, Masuda M, Matsuda T, Matvienko D, Miyabayashi K, Miyata H, Mohanty GB, Moll A, Nakano E, Nakao M, Nanut T, Nath KJ, Negishi K, Niiyama M, Nisar NK, Nishida S, Ogawa S, Okuno S, Olsen SL, Onuki Y, Pakhlov P, Pakhlova G, Pal B, Park CW, Park H, Paul S, Pedlar TK, Pestotnik R, Petrič M, Piilonen LE, Pulvermacher C, Ritter M, Sakai Y, Sandilya S, Sanuki T, Savinov V, Schlüter T, Schneider O, Schnell G, Schwanda C, Seino Y, Semmler D, Senyo K, Seon O, Sevior ME, Shebalin V, Shibata TA, Shiu JG, Shwartz B, Simon F, Solovieva E, Starič M, Stypula J, Sumiyoshi T, Takizawa M, Tamponi U, Tanida K, Teramoto Y, Tikhomirov I, Trabelsi K, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Van Hulse C, Varner G, Vorobyev V, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe Y, Williams KM, Won E, Yamaoka J, Yamashita Y, Yelton J, Yuan CZ, Zhang ZP, Zhilich V, Zhukova V, Zhulanov V, and Zupanc A
Abstract: Using data collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider, we measure the energy dependence of the e^{+}e^{-}→h_{b}(nP)π^{+}π^{-} (n=1, 2) cross sections from thresholds up to 11.02 GeV. We find clear ϒ(10860) and ϒ(11020) peaks with little or no continuum contribution. We study the resonant substructure of the ϒ(11020)→h_{b}(nP)π^{+}π^{-} transitions and find evidence that they proceed entirely via the intermediate isovector states Z_{b}(10610) and Z_{b}(10650). The relative fraction of these states is loosely constrained by the current data: The hypothesis that only Z_{b}(10610) is produced is excluded at the level of 3.3 standard deviations, while the hypothesis that only Z_{b}(10650) is produced is not excluded at a significant level.
Published: 2016
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343. First Observation of the Doubly Cabibbo-Suppressed Decay of a Charmed Baryon: Λ_{c}^{+}→pK^{+}π^{-}.

Author: Yang SB, Tanida K, Kim BH, Adachi I, Aihara H, Asner DM, Aulchenko V, Aushev T, Babu V, Badhrees I, Bakich AM, Barberio E, Bhardwaj V, Bhuyan B, Biswal J, Bonvicini G, Bozek A, Bračko M, Browder TE, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Chistov R, Cho K, Chobanova V, Choi Y, Cinabro D, Dalseno J, Danilov M, Dash N, Doležal Z, Drásal Z, Dutta D, Eidelman S, Farhat H, Fast JE, Ferber T, Fulsom BG, Gabyshev N, Garmash A, Gaur V, Gillard R, Goh YM, Goldenzweig P, Greenwald D, Grygier J, Haba J, Hamer P, Hara T, Hayasaka K, Hayashii H, Hou WS, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki Y, Jacobs WW, Jaegle I, Jeon HB, Joo KK, Julius T, Kang KH, Kato E, Katrenko P, Kiesling C, Kim DY, Kim HJ, Kim JB, Kim KT, Kim MJ, Kim SH, Kim SK, Kim YJ, Kinoshita K, Kobayashi N, Kodyš P, Korpar S, Križan P, Krokovny P, Kuhr T, Kuzmin A, Kwon YJ, Lange JS, Lee IS, Li CH, Li H, Li L, Li Y, Li Gioi L, Libby J, Liventsev D, Lubej M, Masuda M, Matvienko D, Miyabayashi K, Miyata H, Mizuk R, Mohanty GB, Moll A, Moon HK, Mussa R, Nakano E, Nakao M, Nanut T, Nath KJ, Nayak M, Negishi K, Niiyama M, Nisar NK, Nishida S, Ogawa S, Okuno S, Olsen SL, Pakhlova G, Pal B, Park CW, Park H, Pedlar TK, Pestotnik R, Petrič M, Piilonen LE, Pulvermacher C, Rauch J, Ritter M, Rostomyan A, Ryu S, Sahoo H, Sakai Y, Sandilya S, Santelj L, Sanuki T, Sato Y, Savinov V, Schlüter T, Schneider O, Schnell G, Schwanda C, Schwartz AJ, Seino Y, Senyo K, Seon O, Seong IS, Sevior ME, Shebalin V, Shibata TA, Shiu JG, Shwartz B, Simon F, Sohn YS, Sokolov A, Stanič S, Starič M, Stypula J, Sumihama M, Sumiyoshi T, Takizawa M, Tamponi U, Teramoto Y, Trabelsi K, Trusov V, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Vanhoefer P, Varner G, Varvell KE, Vinokurova A, Vossen A, Wagner MN, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe Y, Williams KM, Won E, Yamaoka J, Yashchenko S, Ye H, Yelton J, Yuan CZ, Yusa Y, Zhang ZP, Zhilich V, Zhulanov V, and Zupanc A
Abstract: We report the first observation of the decay Λ_{c}^{+}→pK^{+}π^{-} using a 980 fb^{-1} data sample collected by the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. This is the first observation of a doubly Cabibbo-suppressed decay of a charmed baryon. We measure the branching ratio of this decay with respect to its Cabibbo-favored counterpart to be B(Λ_{c}^{+}→pK^{+}π^{-})/B(Λ_{c}^{+}→pK^{-}π^{+})=(2.35±0.27±0.21)×10^{-3}, where the uncertainties are statistical and systematic, respectively.
Published: 2016
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344. Observation of Z_{b}(10610) and Z_{b}(10650) Decaying to B Mesons.

Author: Garmash A, Abdesselam A, Adachi I, Aihara H, Asner DM, Aushev T, Ayad R, Aziz T, Babu V, Badhrees I, Bakich AM, Behera P, Bhardwaj V, Bhuyan B, Bobrov A, Bondar A, Bonvicini G, Bozek A, Bračko M, Browder TE, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Cho K, Chobanova V, Choi Y, Cinabro D, Dalseno J, Danilov M, Dash N, Doležal Z, Drutskoy A, Dutta D, Eidelman S, Epifanov D, Farhat H, Fast JE, Ferber T, Fulsom BG, Gaur V, Gabyshev N, Gillard R, Goh YM, Goldenzweig P, Golob B, Hara T, Hayasaka K, Hayashii H, Iijima T, Ishikawa A, Itoh R, Iwasaki Y, Jaegle I, Joffe D, Joo KK, Julius T, Kang KH, Kato E, Kawasaki T, Kim DY, Kim JB, Kim KT, Kim MJ, Kim SH, Kim YJ, Kinoshita K, Korpar S, Križan P, Krokovny P, Kuhr T, Kuzmin A, Kwon YJ, Lange JS, Lee IS, Li C, Li H, Li L, Li Gioi L, Libby J, Liventsev D, Lukin P, Masuda M, Matvienko D, Miyabayashi K, Miyata H, Mizuk R, Mohanty GB, Moll A, Mori T, Mussa R, Nakano E, Nakao M, Nanut T, Natkaniec Z, Nishida S, Olsen SL, Pakhlov P, Pakhlova G, Pal B, Park H, Pedlar TK, Pestotnik R, Petrič M, Piilonen LE, Pulvermacher C, Ribežl E, Ritter M, Rostomyan A, Sahoo H, Sakai Y, Sandilya S, Sanuki T, Savinov V, Schneider O, Schnell G, Schwanda C, Seino Y, Semmler D, Senyo K, Seong IS, Sevior ME, Shebalin V, Shen CP, Shibata TA, Shiu JG, Shwartz B, Simon F, Sohn YS, Solovieva E, Starič M, Sumiyoshi T, Tamponi U, Tanida K, Teramoto Y, Trabelsi K, Uchida M, Uehara S, Uglov T, Uno S, Van Hulse C, Vanhoefer P, Varner G, Vorobyev V, Wagner MN, Wang CH, Wang MZ, Wang P, Watanabe Y, Williams KM, Won E, Yamamoto H, Yamaoka J, Yashchenko S, Yelton J, Yook Y, Yuan CZ, Zhang ZP, Zhilich V, Zhulanov V, and Zupanc A
Abstract: We report the analysis of the three-body e^{+}e^{-}→BB[over ¯]π^{±}, BB[over ¯]^{*}π^{±}, and B^{*}B[over ¯]^{*}π^{±} processes, including the first observations of the Z_{b}^{±}(10610)→[BB[over ¯]^{*}+c.c.]^{±} and Z_{b}^{±}(10650)→[B^{*}B[over ¯]^{*}]^{±} transitions that are found to dominate the corresponding final states. We measure Born cross sections for the three-body production of σ(e^{+}e^{-}→[BB[over ¯]^{*}+c.c.]^{±}π^{∓})=[17.4±1.6(stat)±1.9(syst)] pb and σ(e^{+}e^{-}→[B^{*}B[over ¯]^{*}]^{±}π^{∓})=[8.75±1.15(stat)±1.04(syst)] pb and set a 90% C.L. upper limit of σ(e^{+}e^{-}→[BB[over ¯]]^{±}π^{∓})<2.9 pb. The results are based on a 121.4 fb^{-1} data sample collected with the Belle detector at a center-of-mass energy near the ϒ(10860) peak.
Published: 2016
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345. Observation of the Decay B_{s}^{0}→K^{0}K[over ¯]^{0}.

Author: Pal B, Schwartz AJ, Abdesselam A, Adachi I, Aihara H, Asner DM, Aushev T, Ayad R, Aziz T, Babu V, Badhrees I, Bahinipati S, Bakich AM, Barberio E, Behera P, Bhardwaj V, Bhuyan B, Biswal J, Bobrov A, Bozek A, Bračko M, Browder TE, Červenkov D, Chekelian V, Chen A, Cheon BG, Chistov R, Cho K, Chobanova V, Choi Y, Cinabro D, Dalseno J, Dash N, Doležal Z, Drásal Z, Drutskoy A, Dutta D, Eidelman S, Farhat H, Fast JE, Fulsom BG, Gaur V, Garmash A, Gillard R, Goh YM, Goldenzweig P, Greenwald D, Grzymkowska O, Haba J, Hara T, Hayasaka K, Hayashii H, He XH, Hou WS, Inami K, Ishikawa A, Iwasaki Y, Jacobs WW, Jaegle I, Jeon HB, Joffe D, Joo KK, Julius T, Kang KH, Kato E, Kawasaki T, Kiesling C, Kim DY, Kim HJ, Kim KT, Kim MJ, Kim SH, Kinoshita K, Kodyš P, Korpar S, Križan P, Krokovny P, Kuhr T, Kumar R, Kumita T, Kuzmin A, Kwon YJ, Lee IS, Li CH, Li H, Li L, Li Gioi L, Libby J, Liventsev D, Lukin P, Luo T, Masuda M, Matvienko D, Miyabayashi K, Miyata H, Mizuk R, Mohanty GB, Mohanty S, Moll A, Moon HK, Mori T, Mussa R, Nakano E, Nakao M, Nanut T, Natkaniec Z, Nayak M, Nisar NK, Nishida S, Ogawa S, Okuno S, Pakhlov P, Pakhlova G, Park CW, Park H, Paul S, Pedlar TK, Pesántez L, Pestotnik R, Petrič M, Piilonen LE, Pulvermacher C, Rauch J, Ribežl E, Ritter M, Rostomyan A, Ryu S, Sahoo H, Sakai Y, Sandilya S, Sanuki T, Sato Y, Savinov V, Schlüter T, Schneider O, Schnell G, Schwanda C, Seino Y, Senyo K, Seon O, Seong IS, Shebalin V, Shibata TA, Shiu JG, Shwartz B, Simon F, Sohn YS, Sokolov A, Solovieva E, Stanič S, Starič M, Stypula J, Sumihama M, Sumiyoshi T, Tamponi U, Teramoto Y, Trabelsi K, Uchida M, Uehara S, Uglov T, Uno S, Urquijo P, Usov Y, Van Hulse C, Vanhoefer P, Varner G, Vinokurova A, Vossen A, Wagner MN, Wang CH, Wang MZ, Wang XL, Watanabe M, Watanabe Y, Williams KM, Won E, Yamaoka J, Yelton J, Yuan CZ, Yusa Y, Zhang ZP, Zhilich V, Zhulanov V, and Zupanc A
Abstract: We measure the decay B_{s}^{0}→K^{0}K[over ¯]^{0} using data collected at the ϒ(5S) resonance with the Belle detector at the KEKB e^{+}e^{-} collider. The data sample used corresponds to an integrated luminosity of 121.4 fb^{-1}. We measure a branching fraction B(B_{s}^{0}→K^{0}K[over ¯]^{0})=[19.6_{-5.1}^{+5.8}(stat)±1.0(syst)±2.0(N_{B_{s}^{0}B[over ¯]_{s}^{0}})]×10^{-6} with a significance of 5.1 standard deviations. This measurement constitutes the first observation of this decay.
Published: 2016
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346. Observation of B^{0}→pΛ[over ¯]D^{(*)-}.

Author: Chang YY, Wang MZ, Abdesselam A, Adachi I, Adamczyk K, Aihara H, Al Said S, Asner DM, Atmacan H, Aushev T, Babu V, Badhrees I, Bakich AM, Barberio E, Bhuyan B, Biswal J, Bobrov A, Bozek A, Bračko M, Browder TE, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Chistov R, Chobanova V, Choi SK, Choi Y, Cinabro D, Dalseno J, Danilov M, Dingfelder J, Doležal Z, Drásal Z, Dutta D, Eidelman S, Farhat H, Fast JE, Ferber T, Fulsom BG, Gaur V, Gabyshev N, Ganguly S, Garmash A, Gillard R, Glattauer R, Goh YM, Goldenzweig P, Greenwald D, Grzymkowska O, Haba J, Hayasaka K, Hayashii H, He XH, Hou WS, Hsu CL, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki Y, Jacobs WW, Jaegle I, Joffe D, Joo KK, Kawasaki T, Kim DY, Kim HJ, Kim JB, Kim JH, Kim KT, Kim MJ, Kim SH, Kim YJ, Kinoshita K, Korpar S, Križan P, Krokovny P, Kuhr T, Kumita T, Kuzmin A, Kwon YJ, Lai YT, Lee IS, Li L, Li Y, Libby J, Liventsev D, Lukin P, Masuda M, Matvienko D, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohanty GB, Mohanty S, Moll A, Moon HK, Mori T, Nakano E, Nakao M, Nanut T, Nayak M, Nishida S, Ogawa S, Ozaki H, Pakhlov P, Pakhlova G, Pal B, Park CW, Pedlar TK, Pestotnik R, Petrič M, Piilonen LE, Rauch J, Ribežl E, Ritter M, Rostomyan A, Ryu S, Sahoo H, Sakai Y, Sandilya S, Santelj L, Sanuki T, Savinov V, Schneider O, Schnell G, Schwanda C, Seino Y, Senyo K, Seong IS, Sevior ME, Shebalin V, Shen CP, Shibata TA, Shiu JG, Simon F, Sohn YS, Starič M, Stypula J, Sumihama M, Sumisawa K, Sumiyoshi T, Tamponi U, Tanida K, Teramoto Y, Uglov T, Unno Y, Uno S, Usov Y, Van Hulse C, Vanhoefer P, Varner G, Vorobyev V, Vossen A, Wagner MN, Wang CH, Wang P, Watanabe M, Watanabe Y, Williams KM, Won E, Yamaoka J, Yashchenko S, Yelton J, Yusa Y, Zhang ZP, Zhilich V, Zhulanov V, and Zupanc A
Abstract: We report the first observation of the decays B^{0}→pΛ[over ¯]D^{(*)-}. The data sample of 711 fb^{-1} used in this analysis corresponds to 772×10^{6} BB[over ¯] pairs, collected at the ϒ(4S) resonance by the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. We observe 19.8σ and 10.8σ excesses of events for the two decay modes and measure the branching fractions of B^{0}→pΛ[over ¯]D^{-} and B^{0}→pΛ[over ¯]D^{*-} to be (25.1±2.6±3.5)×10^{-6} and (33.6±6.3±4.4)×10^{-6}, respectively, where the first uncertainties are statistical and the second are systematic. These results are not compatible with the predictions based on the generalized factorization approach. In addition, a threshold enhancement in the dibaryon (pΛ[over ¯]) system is observed, consistent with that observed in similar B decays.
Published: 2015
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347. First Observation of the Hadronic Transition ϒ(4S)→ηh(b)(1P) and New Measurement of the h(b)(1P) and η(b)(1S) Parameters.

Author: Tamponi U, Mussa R, Abdesselam A, Aihara H, Arinstein K, Asner DM, Atmacan H, Aushev T, Ayad R, Badhrees I, Bakich AM, Barberio E, Bhardwaj V, Bhuyan B, Biswal J, Bondar A, Bonvicini G, Bozek A, Bračko M, Browder TE, Červenkov D, Chen A, Cheon BG, Cho K, Chobanova V, Choi SK, Choi Y, Cinabro D, Danilov M, Doležal Z, Drásal Z, Drutskoy A, Eidelman S, Epifanov D, Farhat H, Fast JE, Ferber T, Fulsom BG, Gaur V, Gabyshev N, Garmash A, Getzkow D, Gillard R, Goh YM, Golob B, Haba J, Hayasaka K, Hayashii H, He XH, Hedges MT, Hou WS, Iijima T, Inami K, Ishikawa A, Jaegle I, Joffe D, Julius T, Kato E, Katrenko P, Kichimi H, Kiesling C, Kim DY, Kim HJ, Kim JH, Kim KT, Kim SH, Kinoshita K, Kodyš P, Korpar S, Križan P, Krokovny P, Kumita T, Kuzmin A, Lange JS, Lewis P, Libby J, Lukin P, Matvienko D, Miyabayashi K, Miyata H, Mizuk R, Mohanty GB, Moll A, Mori T, Nakano E, Nakao M, Nanut T, Natkaniec Z, Nayak M, Nisar NK, Nishida S, Ogawa S, Okuno S, Olsen SL, Ostrowicz W, Oswald C, Pakhlova G, Pal B, Park H, Pedlar TK, Pesántez L, Pestotnik R, Petrič M, Piilonen LE, Ribežl E, Ritter M, Rostomyan A, Ryu S, Sakai Y, Sandilya S, Santelj L, Sanuki T, Sato Y, Savinov V, Schneider O, Schnell G, Schwanda C, Semmler D, Senyo K, Sevior ME, Shapkin M, Shebalin V, Shen CP, Shibata TA, Shiu JG, Shwartz B, Sibidanov A, Simon F, Sohn YS, Sokolov A, Starič M, Steder M, Stypula J, Tanida K, Teramoto Y, Trabelsi K, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Van Hulse C, Vanhoefer P, Varner G, Vinokurova A, Vossen A, Wagner MN, Wang MZ, Wang XL, Watanabe Y, Williams KM, Won E, Yamaoka J, Yashchenko S, Zhang ZP, Zhilich V, Zhulanov V, and Zupanc A
Abstract: Using a sample of 771.6×10(6) ϒϒ(4S) decays collected by the Belle experiment at the KEKB e(+)e(-) collider, we observe, for the first time, the transition ϒ(4S)→ηh(b)(1P) with the branching fraction B[ϒ(4S)→ηh(b)(1P)]=(2.18±0.11±0.18)×10(-3) and we measure the h(b)(1P) mass M(h(b)(1P))=(9899.3±0.4±1.0) MeV/c(2), corresponding to the hyperfine (HF) splitting ΔM(HF)(1P)=(0.6±0.4±1.0) MeV/c(2). Using the transition h(b)(1P)→γη(b)(1S), we measure the η(b)(1S) mass M(η(b)(1S))=(9400.7±1.7±1.6) MeV/c(2), corresponding to ΔM(HF)(1S)=(59.6±1.7±1.6) MeV/c(2), the η(b)(1S) width Γ(η(b)(1S))=(8(-5)(+6)±5) MeV/c(2) and the branching fraction B[h(b)(1P)→γη(b)(1S)]=(56±8±4)%.
Published: 2015
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348. First Observation of CP Violation in B[over ¯]^{0}→D_{CP}^{(*)}h^{0} Decays by a Combined Time-Dependent Analysis of BABAR and Belle Data.

Author: Abdesselam A, Adachi I, Adametz A, Adye T, Ahmed H, Aihara H, Akar S, Alam MS, Albert J, Al Said S, Andreassen R, Angelini C, Anulli F, Arinstein K, Arnaud N, Asner DM, Aston D, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bahinipati S, Bakich AM, Band HR, Banerjee S, Barberio E, Bard DJ, Barlow RJ, Batignani G, Beaulieu A, Bellis M, Ben-Haim E, Bernard D, Bernlochner FU, Bettarini S, Bettoni D, Bevan AJ, Bhardwaj V, Bhuyan B, Bianchi F, Biasini M, Biswal J, Blinov VE, Bloom PC, Bobrov A, Bomben M, Bondar A, Bonneaud GR, Bonvicini G, Bozek A, Bozzi C, Bračko M, Briand H, Browder TE, Brown DN, Brown DN, Bünger C, Burchat PR, Buzykaev AR, Calabrese R, Calcaterra A, Calderini G, Carpinelli M, Cartaro C, Casarosa G, Cenci R, Červenkov D, Chang P, Chao DS, Chauveau J, Cheaib R, Chekelian V, Chen A, Chen C, Cheng CH, Cheon BG, Chilikin K, Chistov R, Cho K, Chobanova V, Choi HH, Choi SK, Chrzaszcz M, Cibinetto G, Cinabro D, Cochran J, Coleman JP, Contri R, Convery MR, Cowan G, Cowan R, Cremaldi L, Dalseno J, Dasu S, Davier M, Davis CL, De Mori F, De Nardo G, Denig AG, Derkach D, de Sangro R, Dey B, Di Lodovico F, Dingfelder J, Dittrich S, Doležal Z, Dorfan J, Drásal Z, Drutskoy A, Druzhinin VP, Dubois-Felsmann GP, Dunwoodie W, Dutta D, Ebert M, Echenard B, Eidelman S, Eigen G, Eisner AM, Emery S, Ernst JA, Faccini R, Farhat H, Fast JE, Feindt M, Ferber T, Ferrarotto F, Ferroni F, Field RC, Filippi A, Finocchiaro G, Fioravanti E, Flood KT, Ford WT, Forti F, Franco Sevilla M, Fritsch M, Fry JR, Fulsom BG, Gabathuler E, Gabyshev N, Gamba D, Garmash A, Gary JW, Garzia I, Gaspero M, Gaur V, Gaz A, Gershon TJ, Getzkow D, Gillard R, Li Gioi L, Giorgi MA, Glattauer R, Godang R, Goh YM, Goldenzweig P, Golob B, Golubev VB, Gorodeisky R, Gradl W, Graham MT, Grauges E, Griessinger K, Gritsan AV, Grosdidier G, Grünberg O, Guttman N, Haba J, Hafner A, Hamilton B, Hara T, Harrison PF, Hast C, Hayasaka K, Hayashii H, Hearty C, He XH, Hess M, Hitlin DG, Hong TM, Honscheid K, Hou WS, Hsiung YB, Huard Z, Hutchcroft DE, Iijima T, Inguglia G, Innes WR, Ishikawa A, Itoh R, Iwasaki Y, Izen JM, Jaegle I, Jawahery A, Jessop CP, Joffe D, Joo KK, Julius T, Kang KH, Kass R, Kawasaki T, Kerth LT, Khan A, Kiesling C, Kim DY, Kim JB, Kim JH, Kim KT, Kim P, Kim SH, Kim YJ, King GJ, Kinoshita K, Ko BR, Koch H, Kodyš P, Kolomensky YG, Korpar S, Kovalskyi D, Kowalewski R, Kravchenko EA, Križan P, Krokovny P, Kuhr T, Kumar R, Kuzmin A, Kwon YJ, Lacker HM, Lafferty GD, Lanceri L, Lange DJ, Lankford AJ, Latham TE, Leddig T, Le Diberder F, Lee DH, Lee IS, Lee MJ, Lees JP, Leith DW, Leruste P, Lewczuk MJ, Lewis P, Libby J, Lockman WS, Long O, Lopes Pegna D, LoSecco JM, Lou XC, Lueck T, Luitz S, Lukin P, Luppi E, Lusiani A, Luth V, Lutz AM, Lynch G, MacFarlane DB, Malaescu B, Mallik U, Manoni E, Marchiori G, Margoni M, Martellotti S, Martinez-Vidal F, Masuda M, Mattison TS, Matvienko D, McKenna JA, Meadows BT, Miyabayashi K, Miyashita TS, Miyata H, Mizuk R, Mohanty GB, Moll A, Monge MR, Moon HK, Morandin M, Muller DR, Mussa R, Nakano E, Nakazawa H, Nakao M, Nanut T, Nayak M, Neal H, Neri N, Nisar NK, Nishida S, Nugent IM, Oberhof B, Ocariz J, Ogawa S, Okuno S, Olaiya EO, Olsen J, Ongmongkolkul P, Onorato G, Onuchin AP, Onuki Y, Ostrowicz W, Oyanguren A, Pakhlova G, Pakhlov P, Palano A, Pal B, Palombo F, Pan Y, Panduro Vazquez W, Paoloni E, Park CW, Park H, Passaggio S, Patel PM, Patrignani C, Patteri P, Payne DJ, Pedlar TK, Peimer DR, Peruzzi IM, Pesántez L, Pestotnik R, Petrič M, Piccolo M, Piemontese L, Piilonen LE, Pilloni A, Piredda G, Playfer S, Poireau V, Porter FC, Posocco M, Prasad V, Prell S, Prepost R, Puccio EM, Pulliam T, Purohit MV, Pushpawela BG, Rama M, Randle-Conde A, Ratcliff BN, Raven G, Ribežl E, Richman JD, Ritchie JL, Rizzo G, Roberts DA, Robertson SH, Röhrken M, Roney JM, Roodman A, Rossi A, Rostomyan A, Rotondo M, Roudeau P, Sacco R, Sakai Y, Sandilya S, Santelj L, Santoro V, Sanuki T, Sato Y, Savinov V, Schindler RH, Schneider O, Schnell G, Schroeder T, Schubert KR, Schumm BA, Schwanda C, Schwartz AJ, Schwitters RF, Sciacca C, Seiden A, Sekula SJ, Senyo K, Seon O, Serednyakov SI, Sevior ME, Shapkin M, Shebalin V, Shen CP, Shibata TA, Shiu JG, Simard M, Simi G, Simon F, Simonetto F, Skovpen YI, Smith AJ, Smith JG, Snyder A, So RY, Sobie RJ, Soffer A, Sohn YS, Sokoloff MD, Sokolov A, Solodov EP, Solovieva E, Spaan B, Spanier SM, Starič M, Stocchi A, Stroili R, Stugu B, Su D, Sullivan MK, Sumihama M, Sumisawa K, Sumiyoshi T, Summers DJ, Sun L, Tamponi U, Taras P, Tasneem N, Teramoto Y, Tisserand V, Todyshev KY, Toki WH, Touramanis C, Trabelsi K, Tsuboyama T, Uchida M, Uglov T, Unno Y, Uno S, Usov Y, Uwer U, Vahsen SE, Van Hulse C, Vanhoefer P, Varner G, Vasseur G, Va'vra J, Verderi M, Vinokurova A, Vitale L, Vorobyev V, Voß C, Wagner MN, Wagner SR, Waldi R, Walsh JJ, Wang CH, Wang MZ, Wang P, Watanabe Y, West CA, Williams KM, Wilson FF, Wilson JR, Wisniewski WJ, Won E, Wormser G, Wright DM, Wu SL, Wulsin HW, Yamamoto H, Yamaoka J, Yashchenko S, Yuan CZ, Yusa Y, Zallo A, Zhang CC, Zhang ZP, Zhilich V, Zhulanov V, and Zupanc A
Abstract: We report a measurement of the time-dependent CP asymmetry of B[over ¯]^{0}→D_{CP}^{(*)}h^{0} decays, where the light neutral hadron h^{0} is a π^{0}, η, or ω meson, and the neutral D meson is reconstructed in the CP eigenstates K^{+}K^{-}, K_{S}^{0}π^{0}, or K_{S}^{0}ω. The measurement is performed combining the final data samples collected at the ϒ(4S) resonance by the BABAR and Belle experiments at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471±3)×10^{6} BB[over ¯] pairs recorded by the BABAR detector and (772±11)×10^{6} BB[over ¯] pairs recorded by the Belle detector. We measure the CP asymmetry parameters -η_{f}S=+0.66±0.10(stat)±0.06(syst) and C=-0.02±0.07(stat)±0.03(syst). These results correspond to the first observation of CP violation in B[over ¯]^{0}→D_{CP}^{(*)}h^{0} decays. The hypothesis of no mixing-induced CP violation is excluded in these decays at the level of 5.4 standard deviations.
Published: 2015
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349. Search for the dark photon and the dark Higgs boson at belle.

Author: Jaegle I, Adachi I, Aihara H, Al Said S, Asner DM, Aushev T, Ayad R, Bakich AM, Bansal V, Barrett M, Bhuyan B, Bozek A, Bračko M, Browder TE, Červenkov D, Chang MC, Cheon BG, Chilikin K, Cho K, Chobanova V, Choi SK, Choi Y, Cinabro D, Dalseno J, Doležal Z, Drásal Z, Drutskoy A, Dutta D, Eidelman S, Epifanov D, Farhat H, Fast JE, Ferber T, Frost O, Gaur V, Gabyshev N, Ganguly S, Garmash A, Getzkow D, Gillard R, Goh YM, Golob B, Grzymkowska O, Hayasaka K, Hayashii H, He XH, Hedges M, Hou WS, Iijima T, Inami K, Ishikawa A, Iwasaki Y, Julius T, Kang KH, Kato E, Kawasaki T, Kim DY, Kim JB, Kim JH, Kim SH, Kinoshita K, Ko BR, Kodyš P, Korpar S, Križan P, Krokovny P, Kuzmin A, Kwon YJ, Lange JS, Lee IS, Lewis P, Li Gioi L, Libby J, Liventsev D, Matvienko D, Miyata H, Mizuk R, Mohanty GB, Moll A, Mussa R, Nakano E, Nakao M, Nisar NK, Nishida S, Ogawa S, Pakhlov P, Pakhlova G, Park H, Pedlar TK, Pesántez L, Petrič M, Piilonen LE, Ritter M, Rostomyan A, Sakai Y, Sandilya S, Santelj L, Sanuki T, Sato Y, Savinov V, Schneider O, Schnell G, Schwanda C, Semmler D, Senyo K, Seon O, Seong I, Sevior ME, Shebalin V, Shibata TA, Shiu JG, Shwartz B, Simon F, Sinha R, Sohn YS, Starič M, Sumihama M, Sumisawa K, Tamponi U, Tatishvili G, Teramoto Y, Thorne F, Uchida M, Uehara S, Unno Y, Uno S, Vahsen SE, Van Hulse C, Vanhoefer P, Varner G, Vinokurova A, Wagner MN, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe M, Watanabe Y, Williams KM, Won E, Yamaoka J, Yashchenko S, Yook Y, Yusa Y, Zhilich V, Zhulanov V, and Zupanc A
Abstract: The dark photon A^{'} and the dark Higgs boson h^{'} are hypothetical constituents featured in a number of recently proposed dark sector models. Assuming prompt decays of both dark particles, we search for their production in the so-called Higgstrahlung channel e^{+}e^{-}→A^{'}h^{'}, with h^{'}→A^{'}A^{'}. We investigate ten exclusive final states with A^{'}→e^{+}e^{-}, μ^{+}μ^{-}, or π^{+}π^{-} in the mass ranges 0.1 GeV/c^{2}
Published: 2015
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350. Measurement of the Direct CP Asymmetry in B¯→X(s+dγ) Decays with a Lepton Tag.

Author: Pesántez L, Urquijo P, Dingfelder J, Abdesselam A, Adachi I, Adamczyk K, Aihara H, Al Said S, Arinstein K, Asner DM, Aulchenko V, Aushev T, Ayad R, Bahinipati S, Bakich AM, Bansal V, Barberio E, Bhardwaj V, Bhuyan B, Bobrov A, Bondar A, Bonvicini G, Bozek A, Bračko M, Browder TE, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Chistov R, Cho K, Chobanova V, Choi Y, Cinabro D, Dalseno J, Doležal Z, Drásal Z, Drutskoy A, Dutta D, Eidelman S, Farhat H, Fast JE, Ferber T, Frost O, Gaur V, Gabyshev N, Ganguly S, Garmash A, Getzkow D, Gillard R, Goh YM, Golob B, Haba J, Hasenbusch J, Hayashii H, He XH, Heller A, Horiguchi T, Hou WS, Huschle M, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki Y, Jaegle I, Joffe D, Julius T, Kang KH, Kato E, Kawasaki T, Kiesling C, Kim DY, Kim JB, Kim JH, Kim KT, Kim MJ, Kim SH, Kim YJ, Ko BR, Kodyš P, Korpar S, Križan P, Krokovny P, Kronenbitter B, Kuhr T, Kumita T, Kuzmin A, Kwon YJ, Lange JS, Lee IS, Li Y, Li Gioi L, Libby J, Liventsev D, Lukin P, Matvienko D, Miyabayashi K, Miyata H, Mizuk R, Mohanty GB, Moll A, Moon HK, Nakano E, Nakao M, Nanut T, Natkaniec Z, Nayak M, Ng C, Nisar NK, Nishida S, Ogawa S, Okuno S, Olsen SL, Oswald C, Pakhlov P, Pakhlova G, Park CW, Park H, Pedlar TK, Pestotnik R, Petrič M, Piilonen LE, Ribežl E, Ritter M, Rostomyan A, Rozanska M, Sakai Y, Sandilya S, Santelj L, Sanuki T, Sato Y, Savinov V, Schneider O, Schnell G, Schwanda C, Schwartz AJ, Senyo K, Seon O, Sevior ME, Shebalin V, Shen CP, Shibata TA, Shiu JG, Shwartz B, Sibidanov A, Simon F, Sohn YS, Sokolov A, Solovieva E, Starič M, Steder M, Sumiyoshi T, Tamponi U, Taniguchi N, Tatishvili G, Teramoto Y, Trabelsi K, Uchida M, Uglov T, Unno Y, Uno S, Usov Y, Van Hulse C, Vanhoefer P, Varner G, Vinokurova A, Vorobyev V, Wagner MN, Wang B, Wang CH, Wang MZ, Wang P, Watanabe Y, Williams KM, Won E, Yamaoka J, Yashchenko S, Yook Y, Zhang ZP, Zhilich V, Zhulanov V, and Zupanc A
Abstract: We report the measurement of the direct CP asymmetry in the radiative B¯→X(s+dγ) decay using a data sample of (772 ± 11)×10(6) BB[over ¯] pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The CP asymmetry is measured as a function of the photon energy threshold. For Eγ*≥2.1 GeV, where Eγ* is the photon energy in the center-of-mass frame, we obtain A(CP)(B¯→X(s+dγ))=(2.2±3.9±0.9)%, consistent with the standard model prediction.
Published: 2015
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