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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
  • KEK and Graduate University for Advanced Studies (Sokendai)
  • High Energy Accelerator Research Organization (KEK)
  • University of Tokyo
  • Brookhaven National Laboratory
  • National Research University Higher School of Economics
  • University of Tabuk
  • Deutsches Elektronen-Synchrotron (DESY)
  • Indian Institute of Technology Madras
  • Institute for High Energy Physics (IHEP)
  • University of Mississippi
  • University of Hawaii
  • Indian Institute of Science Education and Research Mohali
  • Indian Institute of Technology Guwahati
  • Charles University
  • Jožef Stefan Institute
  • Budker Institute of Nuclear Physics (SB RAS)
  • Novosibirsk State University
  • P.N. Lebedev Physical Institute of the Russian Academy of Sciences
  • Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
  • University of Maribor
  • Sezione INFN di Roma La Sapienza
  • INFN Sezione di Napoli
  • Università di Napoli Federico II
  • Fu Jen Catholic University
  • National Taiwan University
  • Max-Planck-Institut für Physik
  • 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 Jaipur
  • Fudan University
  • Pacific Northwest National Laboratory
  • Panjab University
  • Virginia Polytechnic Institute and State University
  • Humanoid Technologies Lab (H2T)
  • University of Pittsburgh
  • Univ. of Cincinnati
  • Tata Institute of Fundamental Research, Mumbai
  • Niigata University
  • Nara Women's University
  • University of Sydney
  • Nagoya University
  • Osaka Prefecture University
  • Indiana University Bloomington
  • Chonnam National University
  • Kyungpook National University
  • Soongsil University
  • Kitasato University
  • Univ. of Ljubljana
  • University of Munich
  • Punjab Agricultural University
  • Justus-Liebig-Universität Gießen
  • Sez. di Roma Tre
  • Liaoning Normal University
  • Beijing University
  • School of Physics
  • Osaka University
  • University of Miyazaki
  • Utkal University
  • Österreichische Akademie der Wissenschaften
  • Toho University
  • Nippon Dental University
  • National Research Nuclear University MEPhI
  • Luther College, Decorah
  • Forschungszentrum Jülich (FZJ)
  • Technical University of Munich
  • Biodonostia Health Research Institute-CIBERNED-UPV-EHU
  • Basque Foundation for Science
  • Yamagata University
  • Gifu University
  • Tokyo Metropolitan University
  • Riken
  • Showa Pharmaceutical University
  • INFN Sez. di Torino
  • Japan Atomic Energy Agency
  • University Paris-Sud
  • Tokyo Institute of Technology
  • National United University Taiwan
  • Institute of High Energy Physics Chinese Academy of Science
  • 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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