Observation of B (s)0 →j/ψp p Decays and Precision Measurements of the B (s)0 Masses

LHCb Collaboration

doi:10.1103/PhysRevLett.122.191804

Observation of B (s)0 →j/ψp p Decays and Precision Measurements of the B (s)0 Masses

LHCb Collaboration

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University of Zurich
Universidade de Santiago de Compostela
University of Bristol
University of Michigan, Ann Arbor
Syracuse University
Clermont-Auvergne University
University of Cincinnati
LNF-INFN
University of Dortmund
European Organization for Nuclear Research
University of Glasgow
University of Barcelona
Petersburg Nuclear Physics Institute (PNPI)
Imperial College London
Instituto de Biofisica da UFRJ
INFN
Laboratoire de l'Accélérateur Linéaire
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
ENAC-IIC-GEL
Sezione INFN di Ferrara
University of Maryland, College Park
Aix Marseille Université
Kurchatov Institute
Yandex School of Data Analysis
Sezione INFN di Cagliari
University of Heidelberg
University of Warwick
University of Manchester
Sezione di Genova
National University of Science and Technology “MISIS”
Institute for Theoretical and Experimental Physics
National Centre for Nuclear Research (NCBJ)
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
Centro Brasileiro de Pesquisas Fisicas
University of Chinese Academy of Sciences
INFN Sezione di Milano-Bicocca
University of Milano-Bicocca
Sorbonne Université
RWTH Aachen University
Moscow State University
INFN Sezione di Bologna
University of Cambridge
Institute for Nuclear Physics
University of Birmingham
University of Modena and Reggio Emilia
University of Oxford
Sezione di Roma
Massachusetts Institute of Technology
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
Novosibirsk State University
University of Liverpool
Tsinghua University
Wuhan University
University of Ferrara
Universitat Ramon LLull - CSIC
University of Bologna
INFN Roma Tor Vergata
University of Pisa
LTHE (UMR 5564 CNRS/IRD/Université de Grenoble)
University of Edinburgh
Horia Hulubei National Institute of Physics and Nuclear Engineering
MST-8, Los Alamos National Laboratory
INFN Sezione di Bari
Università degli studi di Bari Aldo Moro
Max-Planck-Institut für Kernphysik
Agh University of Science and Technology Faculty of Computer Science
National Research University
Central China Normal University
INFN Sezione di Trieste
Kharkov Institute of Physics and Technology
CCLRC Rutherford Appleton Laboratory
Institute for Nuclear Research of the Russian Academy of Sciences
University of Genoa
Sezione INFN di Milano
University of Milano
University of Valencia
Pontifícia Universidade Católica do Rio de Janeiro
Universidade Federal Do Triângulo Mineiro (UFTM)
Universität Rostock
Univ. Mentouri de Constantine
Vrije Universiteit Amsterdam
Institute of Nuclear Research, National Academy of Sciences in Ukraine
Lanzhou University
Kurchatov Institute
South China Normal University
University of Padova
Universitá di Cagliari
Iligan Institute of Technology (IIT)
University College Dublin
Universidad Nacional de Colombia
Scuola Normale Superiore di Pisa
Hanoi University of Science
ICS/University of Groningen
National Research Tomsk Polytechnic University
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
University of Rome “Tor Vergata”
University of Rome
Università degli Studi della Basilicata
University of Urbino Carlo Bo
Hunan University
Shaanxi Normal University

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

The first observation of the decays B(s)0→J/ψpp is reported, using proton-proton collision data corresponding to an integrated luminosity of 5.2 fb-1, collected with the LHCb detector. These decays are suppressed due to limited available phase space, as well as due to Okubo-Zweig-Iizuka or Cabibbo suppression. The measured branching fractions are B(B0→J/ψpp)=[4.51±0.40(stat)±0.44(syst)]×10-7, B(Bs0→J/ψpp)=[3.58±0.19(stat)±0.39(syst)]×10-6. For the Bs0 meson, the result is much higher than the expected value of O(10-9). The small available phase space in these decays also allows for the most precise single measurement of both the B0 mass as 5279.74±0.30(stat)±0.10(syst) MeV and the Bs0 mass as 5366.85±0.19(stat)±0.13(syst) MeV.

langue originale	Anglais
Numéro d'article	191804
journal	Physical Review Letters
Volume	122
Numéro de publication	19
Les DOIs	https://doi.org/10.1103/PhysRevLett.122.191804
état	Publié - 17 mai 2019

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10.1103/PhysRevLett.122.191804

Contient cette citation

@article{a9828a794e714dddadf596067cd43a44,

title = "Observation of B (s)0 →j/ψp p Decays and Precision Measurements of the B (s)0 Masses",

abstract = "The first observation of the decays B(s)0→J/ψpp is reported, using proton-proton collision data corresponding to an integrated luminosity of 5.2 fb-1, collected with the LHCb detector. These decays are suppressed due to limited available phase space, as well as due to Okubo-Zweig-Iizuka or Cabibbo suppression. The measured branching fractions are B(B0→J/ψpp)=[4.51±0.40(stat)±0.44(syst)]×10-7, B(Bs0→J/ψpp)=[3.58±0.19(stat)±0.39(syst)]×10-6. For the Bs0 meson, the result is much higher than the expected value of O(10-9). The small available phase space in these decays also allows for the most precise single measurement of both the B0 mass as 5279.74±0.30(stat)±0.10(syst) MeV and the Bs0 mass as 5366.85±0.19(stat)±0.13(syst) MeV.",

author = "\{LHCb Collaboration\} and R. Aaij and \{Abell{\'a}n Beteta\}, C. and B. Adeva and M. Adinolfi and Aidala, \{C. A.\} and Z. Ajaltouni and S. Akar and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and \{Alfonso Albero\}, A. and G. Alkhazov and \{Alvarez Cartelle\}, P. and Alves, \{A. A.\} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, \{J. E.\} and F. Archilli and \{Arnau Romeu\}, J. and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and Back, \{J. J.\} and S. Baker and V. Balagura and W. Baldini and A. Baranov and Barlow, \{R. J.\} and Barrand, \{G. C.\} and S. Barsuk and W. Barter and M. Bartolini and F. Baryshnikov and V. Batozskaya and B. Batsukh and A. Battig and V. Battista and A. Bay and F. Fleuret and E. Maurice",

note = "Publisher Copyright: {\textcopyright} 2019 CERN, for the LHCb Collaboration. American Physical Society.",

year = "2019",

month = may,

day = "17",

doi = "10.1103/PhysRevLett.122.191804",

language = "English",

volume = "122",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "19",

}

TY - JOUR

T1 - Observation of B (s)0 →j/ψp p Decays and Precision Measurements of the B (s)0 Masses

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abellán Beteta, C.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Archilli, F.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Back, J. J.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Baranov, A.

AU - Barlow, R. J.

AU - Barrand, G. C.

AU - Barsuk, S.

AU - Barter, W.

AU - Bartolini, M.

AU - Baryshnikov, F.

AU - Batozskaya, V.

AU - Batsukh, B.

AU - Battig, A.

AU - Battista, V.

AU - Bay, A.

AU - Fleuret, F.

AU - Maurice, E.

PY - 2019/5/17

Y1 - 2019/5/17

N2 - The first observation of the decays B(s)0→J/ψpp is reported, using proton-proton collision data corresponding to an integrated luminosity of 5.2 fb-1, collected with the LHCb detector. These decays are suppressed due to limited available phase space, as well as due to Okubo-Zweig-Iizuka or Cabibbo suppression. The measured branching fractions are B(B0→J/ψpp)=[4.51±0.40(stat)±0.44(syst)]×10-7, B(Bs0→J/ψpp)=[3.58±0.19(stat)±0.39(syst)]×10-6. For the Bs0 meson, the result is much higher than the expected value of O(10-9). The small available phase space in these decays also allows for the most precise single measurement of both the B0 mass as 5279.74±0.30(stat)±0.10(syst) MeV and the Bs0 mass as 5366.85±0.19(stat)±0.13(syst) MeV.

AB - The first observation of the decays B(s)0→J/ψpp is reported, using proton-proton collision data corresponding to an integrated luminosity of 5.2 fb-1, collected with the LHCb detector. These decays are suppressed due to limited available phase space, as well as due to Okubo-Zweig-Iizuka or Cabibbo suppression. The measured branching fractions are B(B0→J/ψpp)=[4.51±0.40(stat)±0.44(syst)]×10-7, B(Bs0→J/ψpp)=[3.58±0.19(stat)±0.39(syst)]×10-6. For the Bs0 meson, the result is much higher than the expected value of O(10-9). The small available phase space in these decays also allows for the most precise single measurement of both the B0 mass as 5279.74±0.30(stat)±0.10(syst) MeV and the Bs0 mass as 5366.85±0.19(stat)±0.13(syst) MeV.

U2 - 10.1103/PhysRevLett.122.191804

DO - 10.1103/PhysRevLett.122.191804

M3 - Article

C2 - 31144973

AN - SCOPUS:85065834588

SN - 0031-9007

VL - 122

JO - Physical Review Letters

JF - Physical Review Letters

IS - 19

M1 - 191804

ER -

Observation of B (s)0 →j/ψp p Decays and Precision Measurements of the B (s)0 Masses

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