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Measurements of q2 moments of inclusive B →xcℓ+νℓ decays with hadronic tagging

  • R. Van Tonder
  • , L. Cao
  • , W. Sutcliffe
  • , M. Welsch
  • , F. U. Bernlochner
  • , I. Adachi
  • , H. Aihara
  • , D. M. Asner
  • , T. Aushev
  • , R. Ayad
  • , V. Babu
  • , P. Behera
  • , K. Belous
  • , J. Bennett
  • , M. Bessner
  • , V. Bhardwaj
  • , B. Bhuyan
  • , T. Bilka
  • , J. Biswal
  • , A. Bobrov
  • D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, S. Dubey, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, O. Hartbrich, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, S. Korpar, E. Kovalenko, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, J. S. Lange, M. Laurenza, S. C. Lee, P. Lewis, C. H. Li, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. Macqueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, S. Mohanty, M. Mrvar, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, K. Ogawa, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, H. Park, S. H. Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, A. Rabusov, M. Röhrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, L. Santelj, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J. G. Shiu, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, J. F. Strube, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, S. E. Vahsen, G. Varner, K. E. Varvell, E. Waheed, C. H. Wang, E. Wang, M. Z. Wang, P. Wang, X. L. Wang, M. Watanabe, S. Watanuki, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. H. Yin, Z. P. Zhang, V. Zhilich, V. Zhukova
  • University of Bonn
  • The Graduate University for Advanced Studies
  • High Energy Accelerator Research Organization, Tsukuba
  • The University of Tokyo
  • Brookhaven National Laboratory
  • Higher School of Economics
  • University of Tabuk
  • German Electron Synchrotron
  • Indian Institute of Technology Madras
  • Institute for High Energy Physics
  • University of Mississippi
  • University of Hawai'i at Mānoa
  • Indian Institute of Science Education and Research Mohali
  • Indian Institute of Technology Guwahati
  • Charles University
  • Jožef Stefan Institute
  • RAS - Budker Institute of Nuclear Physics
  • Novosibirsk State University
  • RAS - P.N. Lebedev Physics Institute
  • H. Niewodniczanski Institute of Nuclear Physics
  • University of Maribor
  • National Institute for Nuclear Physics
  • University of Naples Federico II
  • Fu Jen Catholic University
  • National Taiwan University
  • Max Planck Institute for Physics (Werner Heisenberg Institute)
  • National Central University
  • Hanyang University
  • Korea Institute of Science and Technology Information
  • Yonsei University
  • Sungkyunkwan University
  • Indian Institute of Technology Hyderabad
  • Wayne State University
  • Malaviya National Institute of Technology
  • Fudan University
  • Pacific Northwest National Laboratory
  • Panjab University
  • Virginia Polytechnic Institute and State University
  • Karlsruhe Institute of Technology
  • University of Pittsburgh
  • University of Cincinnati
  • Tata Institute of Fundamental Research
  • Niigata University
  • Nara Women's University
  • The University of Sydney
  • Nagoya University
  • Osaka Metropolitan University
  • Indiana University Bloomington
  • Chonnam National University
  • Soongsil University
  • Kitasato University
  • University of Ljubljana
  • Ludwig Maximilian University of Munich
  • Punjab Agricultural University
  • Justus Liebig University Giessen
  • Roma Tre University
  • Kyungpook National University
  • Liaoning Normal University
  • Peking University
  • University of Melbourne
  • The University of Osaka
  • University of Miyazaki
  • Utkal University
  • Austrian Academy of Sciences
  • Toho University
  • Nippon Dental University
  • Moscow Engineering Physics Institute
  • Technical University of Munich
  • Luther College, Decorah
  • Jülich Research Centre
  • University of the Basque Country
  • Ikerbasque Basque Foundation for Science
  • Yamagata University
  • Gifu University
  • Tokyo Metropolitan University
  • RIKEN
  • Showa Pharmaceutical University
  • Japan Atomic Energy Agency
  • Université Paris-Saclay
  • Institute of Science Tokyo
  • National United University Taiwan
  • CAS - Institute of High Energy Physics
  • University of Science and Technology of China
  • Korea University

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

We present the measurement of the first to fourth order moments of the four-momentum transfer squared, q2, of inclusive B→Xcℓ+νℓ decays using the full Belle dataset of 711 fb-1 of integrated luminosity at the (4S) resonance where ℓ=e, μ. The determination of these moments and their systematic uncertainties open new pathways to determine the absolute value of the Cabibbo-Kobayashi-Maskawa matrix element Vcb using a reduced set of matrix elements of the heavy quark expansion. In order to identify and reconstruct the Xc system, we reconstruct one of the two B-mesons using machine learning techniques in fully hadronic decay modes. The moments are measured with progressively increasing threshold selections on q2 starting with a lower value of 3.0 GeV2 in steps of 0.5 GeV2 up to a value of 10.0 GeV2. The measured moments are further unfolded, correcting for reconstruction and selection effects as well as QED final state radiation. We report the moments separately for electron and muon final states and observe no lepton flavor universality violating effects.

Original languageEnglish
Article numberA46
JournalPhysical Review D
Volume104
Issue number11
DOIs
StatePublished - 1 Dec 2021

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