Observation of a new Ξb0 state

(LHCb Collaboration)

doi:10.1103/PhysRevD.103.012004

Observation of a new Ξb0 state

(LHCb Collaboration)

Science Park 105
University of Zurich
University of Liverpool
Universidade de Santiago de Compostela
University of Bristol
Clermont-Auvergne University
University of Michigan, Ann Arbor
Sezione INFN di Milano
University of Cincinnati
University of Dortmund
European Organization for Nuclear Research
University of Glasgow
University of Barcelona
University of Manchester
Petersburg Nuclear Physics Institute (PNPI)
Instituto de Biofisica da UFRJ
Université Paris-Saclay
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
Sezione INFN di Ferrara
University of Heidelberg
Kurchatov Institute
Syracuse University
Yandex School of Data Analysis
Aix Marseille Université
ENAC-IIC-GEL
University of Warwick
Imperial College London
Centro Brasileiro de Pesquisas Fisicas
Sezione di Genova
National University of Science and Technology “MISIS”
RWTH Aachen University
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
Sezione INFN di Cagliari
Moscow State University
Institute for Theoretical and Experimental Physics
LNF-INFN
Sorbonne Université
University of Padova
INFN Sezione di Bologna
University of Cambridge
Institute for Nuclear Physics
Wuhan University
University of Birmingham
University of Oxford
Massachusetts Institute of Technology
National Research University
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
University of Maryland, College Park
Institute for Nuclear Research of the Russian Academy of Sciences
INFN Sezione di Milano-Bicocca
Universitat Ramon LLull - CSIC
University of Chinese Academy of Sciences
INFN Roma Tor Vergata
Institute of High Energy Physics, Chinese Academy of Sciences
LTHE (UMR 5564 CNRS/IRD/Université de Grenoble)
Tsinghua University
University of Edinburgh
Horia Hulubei National Institute of Physics and Nuclear Engineering
INFN Sezione di Bari
MST-8, Los Alamos National Laboratory
ICS/University of Groningen
Maastricht University
Agh University of Science and Technology Faculty of Computer Science
Institute of Nuclear Research, National Academy of Sciences in Ukraine
University College Dublin
Kharkov Institute of Physics and Technology
INFN Sezione di Perugia
CCLRC Rutherford Appleton Laboratory
Monash University
Tsinghua University
Pontifícia Universidade Católica do Rio de Janeiro
Central China Normal University
University of Valencia
South China Normal University
Vrije Universiteit Amsterdam
National Research Tomsk Polytechnic University
National Centre for Nuclear Research (NCBJ)
Sezione di Roma
Kurchatov Institute
Universität Rostock
Universidad Nacional de Colombia
University Bonn
Max-Planck-Institut für Kernphysik
Hunan University

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

Résumé

Using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 8.5 fb-1, the observation of a new excited Ξb0 resonance decaying to the Ξb-π+ final state is presented. The state, referred to as Ξb(6227)0, has a measured mass and natural width of m(Ξb(6227)0)=6227.1-1.5+1.4±0.5 MeV and Γ(Ξb(6227)0)=18.6-4.1+5.0±1.4 MeV, where the uncertainties are statistical and systematic. The production rate of the Ξb(6227)0 state relative to that of the Ξb- baryon in the kinematic region 2<η<5 and pT<30 GeV is measured to be fΞb(6227)0fΞb-B(Ξb(6227)0→Ξb-π+)=0.045±0.008±0.004, where B(Ξb(6227)0→Ξb-π+) is the branching fraction of the decay, and fΞb(6227)0 and fΞb- represent fragmentation fractions. Improved measurements of the mass and natural width of the previously observed Ξb(6227)- state, along with the mass of the Ξb- baryon, are also reported. Both measurements are significantly more precise than, and consistent with, previously reported values.

langue originale	Anglais
Numéro d'article	012004
journal	Physical Review D
Volume	103
Numéro de publication	1
Les DOIs	https://doi.org/10.1103/PhysRevD.103.012004
état	Publié - 6 janv. 2021
Modification externe	Oui

Accès au document

10.1103/PhysRevD.103.012004

Contient cette citation

@article{e8f3b6218c864fa0ad59e4d8c9878daa,

title = "Observation of a new Ξb0 state",

abstract = "Using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 8.5 fb-1, the observation of a new excited Ξb0 resonance decaying to the Ξb-π+ final state is presented. The state, referred to as Ξb(6227)0, has a measured mass and natural width of m(Ξb(6227)0)=6227.1-1.5+1.4±0.5 MeV and Γ(Ξb(6227)0)=18.6-4.1+5.0±1.4 MeV, where the uncertainties are statistical and systematic. The production rate of the Ξb(6227)0 state relative to that of the Ξb- baryon in the kinematic region 2<η<5 and pT<30 GeV is measured to be fΞb(6227)0fΞb-B(Ξb(6227)0→Ξb-π+)=0.045±0.008±0.004, where B(Ξb(6227)0→Ξb-π+) is the branching fraction of the decay, and fΞb(6227)0 and fΞb- represent fragmentation fractions. Improved measurements of the mass and natural width of the previously observed Ξb(6227)- state, along with the mass of the Ξb- baryon, are also reported. Both measurements are significantly more precise than, and consistent with, previously reported values.",

author = "\{(LHCb Collaboration)\} and R. Aaij and \{Abell{\'a}n Beteta\}, C. and T. Ackernley and B. Adeva and M. Adinolfi and H. Afsharnia and Aidala, \{C. A.\} and S. Aiola and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and \{Alfonso Albero\}, A. and Z. Aliouche and G. Alkhazov and \{Alvarez Cartelle\}, P. and S. Amato and Y. Amhis and L. An and L. Anderlini and A. Andreianov and M. Andreotti and F. Archilli and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and M. Bachmayer and Back, \{J. J.\} and S. Baker and \{Baladron Rodriguez\}, P. and V. Balagura and W. Baldini and \{Baptista Leite\}, J. and Barlow, \{R. J.\} and S. Barsuk and W. Barter and M. Bartolini and F. Baryshnikov and Basels, \{J. M.\} and G. Bassi and B. Batsukh and A. Battig and A. Bay and F. Fleuret and E. Maurice",

note = "Publisher Copyright: {\textcopyright} 2021 CERN. ",

year = "2021",

month = jan,

day = "6",

doi = "10.1103/PhysRevD.103.012004",

language = "English",

volume = "103",

journal = "Physical Review D",

issn = "2470-0010",

number = "1",

}

TY - JOUR

T1 - Observation of a new Ξb0 state

AU - (LHCb Collaboration)

AU - Aaij, R.

AU - Abellán Beteta, C.

AU - Ackernley, T.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Afsharnia, H.

AU - Aidala, C. A.

AU - Aiola, S.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Aliouche, Z.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Amato, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreianov, A.

AU - Andreotti, M.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Bachmayer, M.

AU - Back, J. J.

AU - Baker, S.

AU - Baladron Rodriguez, P.

AU - Balagura, V.

AU - Baldini, W.

AU - Baptista Leite, J.

AU - Barlow, R. J.

AU - Barsuk, S.

AU - Barter, W.

AU - Bartolini, M.

AU - Baryshnikov, F.

AU - Basels, J. M.

AU - Bassi, G.

AU - Batsukh, B.

AU - Battig, A.

AU - Bay, A.

AU - Fleuret, F.

AU - Maurice, E.

PY - 2021/1/6

Y1 - 2021/1/6

N2 - Using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 8.5 fb-1, the observation of a new excited Ξb0 resonance decaying to the Ξb-π+ final state is presented. The state, referred to as Ξb(6227)0, has a measured mass and natural width of m(Ξb(6227)0)=6227.1-1.5+1.4±0.5 MeV and Γ(Ξb(6227)0)=18.6-4.1+5.0±1.4 MeV, where the uncertainties are statistical and systematic. The production rate of the Ξb(6227)0 state relative to that of the Ξb- baryon in the kinematic region 2<η<5 and pT<30 GeV is measured to be fΞb(6227)0fΞb-B(Ξb(6227)0→Ξb-π+)=0.045±0.008±0.004, where B(Ξb(6227)0→Ξb-π+) is the branching fraction of the decay, and fΞb(6227)0 and fΞb- represent fragmentation fractions. Improved measurements of the mass and natural width of the previously observed Ξb(6227)- state, along with the mass of the Ξb- baryon, are also reported. Both measurements are significantly more precise than, and consistent with, previously reported values.

AB - Using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 8.5 fb-1, the observation of a new excited Ξb0 resonance decaying to the Ξb-π+ final state is presented. The state, referred to as Ξb(6227)0, has a measured mass and natural width of m(Ξb(6227)0)=6227.1-1.5+1.4±0.5 MeV and Γ(Ξb(6227)0)=18.6-4.1+5.0±1.4 MeV, where the uncertainties are statistical and systematic. The production rate of the Ξb(6227)0 state relative to that of the Ξb- baryon in the kinematic region 2<η<5 and pT<30 GeV is measured to be fΞb(6227)0fΞb-B(Ξb(6227)0→Ξb-π+)=0.045±0.008±0.004, where B(Ξb(6227)0→Ξb-π+) is the branching fraction of the decay, and fΞb(6227)0 and fΞb- represent fragmentation fractions. Improved measurements of the mass and natural width of the previously observed Ξb(6227)- state, along with the mass of the Ξb- baryon, are also reported. Both measurements are significantly more precise than, and consistent with, previously reported values.

U2 - 10.1103/PhysRevD.103.012004

DO - 10.1103/PhysRevD.103.012004

M3 - Article

AN - SCOPUS:85099291869

SN - 2470-0010

VL - 103

JO - Physical Review D

JF - Physical Review D

IS - 1

M1 - 012004

ER -

Observation of a new Ξb0 state

Résumé

Accès au document

Empreinte digitale

Contient cette citation