Observation of ᴧb0→ ᴧc+ D̄(*)0K− and ᴧb0→ ᴧc+ Ds*− decays

LHCb Collaboration

doi:10.1140/epjc/s10052-024-12752-3

Observation of ᴧ_b⁰→ ᴧ_c⁺ D̄^()0K⁻ and ᴧ_b⁰→ ᴧ_c⁺ D_s^− decays

LHCb Collaboration

European Organization for Nuclear Research
Science Park 105
University of Warwick
Physik-Institut der Universität Zürich
University of Liverpool
Universidade de Santiago de Compostela
University of Bristol
Uppsala University
University of Michigan, Ann Arbor
Clermont-Auvergne University
University of Cincinnati
LNF-INFN
University of Dortmund
University of Glasgow
University of Barcelona
University of Manchester
University of Cambridge
Sorbonne Université
Instituto de Biofisica da UFRJ
Université Paris-Saclay
State Key Laboratory of Nuclear Physics and Technology
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
Sezione INFN di Ferrara
Syracuse University
INFN Sezione di Milano-Bicocca
University of Milano-Bicocca
University of Chinese Academy of Sciences
INFN Roma Tor Vergata
University of Rome “Tor Vergata”
Consejo Nacional de Rectores (CONARE)
Aix-Marseille Université
Massachusetts Institute of Technology
Ip Paris
University of Oxford
Laboratoire de Physique des Particules
University of Heidelberg
ENAC-IIC-GEL
Centro Brasileiro de Pesquisas Fisicas
University of Florence
Pontifícia Universidade Católica do Rio de Janeiro
University of Edinburgh
RWTH Aachen University
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
Scuola Normale Superiore di Pisa
Institute of High Energy Physics, Chinese Academy of Sciences
Sezione di Genova
Universitat Ramon LLull - CSIC
University of Padova
Institute for Nuclear Physics
Imperial College London
Maastricht University
University of Ferrara
University of Maryland, College Park
Sezione INFN di Cagliari
South China Normal University
Wuhan University
INFN Sezione di Bologna
University of Bologna
University of Genoa
Sezione INFN di Milano
University of Milano
Institute of Nuclear Research, National Academy of Sciences in Ukraine
Universidade da Coruña
Horia Hulubei National Institute of Physics and Nuclear Engineering
INFN Sezione di Bari
Universidad Nacional Autónoma de Honduras
MST-8, Los Alamos National Laboratory
Hunan University
Universitá di Cagliari
ICS/University of Groningen
Centro Federal De Educacão Tecnológica Celso Suckow Da Fonseca
Università degli studi di Bari Aldo Moro
Central China Normal University
Eötvös Loránd University
Tsinghua University
University College Dublin
Tadeusz Kosciuszko Cracow University of Technology
INFN Sezione di Perugia
CCLRC Rutherford Appleton Laboratory
University Bonn
Monash University
University of Perugia
Agh University of Science and Technology Faculty of Computer Science
National Centre for Nuclear Research (NCBJ)
Universidade de Brasília
University of Valencia
Universidad Nacional de Colombia
University of Birmingham
Kharkov Institute of Physics and Technology
Vrije Universiteit Amsterdam
University of Pisa
Lanzhou University
Henan University
Sezione di Roma
Technische Universität München
Departement de Physique Nucleaire (SPhN)
Università degli Studi della Basilicata
Max-Planck-Institut für Kernphysik
University of Siena
Universidad de Alcalá
University of Urbino Carlo Bo

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

Résumé

The decays Λ_b ⁰→Λ_c ⁺D¯^(∗)0K^- and Λ_b ⁰→Λ_c ⁺D_s ^∗- are observed for the first time, in proton-proton collision data at s=13TeV, corresponding to an integrated luminosity of 5.4fb^-1 collected with the LHCb detector. Their ratios of branching fractions with respect to the Λ_b ⁰→Λ_c ⁺D_s ^- mode are measured to be (Formula presented.) where the first uncertainties are statistical, the second systematic, and the third, for the Λ_b ⁰→Λ_c ⁺D¯^(∗)0K^- decays, are due to the uncertainties on the branching fractions of the D_s ^-→K^-K⁺π^- and D¯⁰→K⁺π^- decay modes. The measured branching fractions probe factorization assumptions in effective theories and provide the normalization for future pentaquark searches in Λ_b ⁰→Λ_c ⁺D¯^(∗)0K^- decay channels.

langue originale	Anglais
Numéro d'article	575
journal	European Physical Journal C
Volume	84
Numéro de publication	6
Les DOIs	https://doi.org/10.1140/epjc/s10052-024-12752-3
état	Publié - 1 juin 2024

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10.1140/epjc/s10052-024-12752-3

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Contient cette citation

@article{fd4ea51d134c4bf0b7bbed908d65bec2,

title = "Observation of ᴧb0→ ᴧc+ {\=D}(*)0K− and ᴧb0→ ᴧc+ Ds*− decays",

abstract = "The decays Λb 0→Λc +D¯(∗)0K- and Λb 0→Λc +Ds ∗- are observed for the first time, in proton-proton collision data at s=13TeV, corresponding to an integrated luminosity of 5.4fb-1 collected with the LHCb detector. Their ratios of branching fractions with respect to the Λb 0→Λc +Ds - mode are measured to be (Formula presented.) where the first uncertainties are statistical, the second systematic, and the third, for the Λb 0→Λc +D¯(∗)0K- decays, are due to the uncertainties on the branching fractions of the Ds -→K-K+π- and D¯0→K+π- decay modes. The measured branching fractions probe factorization assumptions in effective theories and provide the normalization for future pentaquark searches in Λb 0→Λc +D¯(∗)0K- decay channels.",

author = "\{LHCb Collaboration\} and R. Aaij and Abdelmotteleb, \{A. S.W.\} and Beteta, \{C. Abellan\} and F. Abudin{\'e}n and T. Ackernley and B. Adeva and M. Adinolfi and P. Adlarson and C. Agapopoulou and Aidala, \{C. A.\} and Z. Ajaltouni and S. Akar and K. Akiba and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and \{Alfonso Albero\}, A. and Z. Aliouche and \{Alvarez Cartelle\}, P. and R. Amalric and S. Amato and Amey, \{J. L.\} and Y. Amhis and L. An and L. Anderlini and M. Andersson and A. Andreianov and P. Andreola and M. Andreotti and D. Andreou and A. Anelli and D. Ao and F. Archilli and M. Argenton and \{Arguedas Cuendis\}, S. and A. Artamonov and M. Artuso and E. Aslanides and M. Atzeni and B. Audurier and D. Bacher and \{Bachiller Perea\}, I. and S. Bachmann and M. Bachmayer and Back, \{J. J.\} and \{Baladron Rodriguez\}, P. and V. Balagura and F. Fleuret and E. Maurice",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2024.",

year = "2024",

month = jun,

day = "1",

doi = "10.1140/epjc/s10052-024-12752-3",

language = "English",

volume = "84",

journal = "European Physical Journal C",

issn = "1434-6044",

number = "6",

}

TY - JOUR

T1 - Observation of ᴧb0→ ᴧc+ D̄(*)0K− and ᴧb0→ ᴧc+ Ds*− decays

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Beteta, C. Abellan

AU - Abudinén, F.

AU - Ackernley, T.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adlarson, P.

AU - Agapopoulou, C.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Akiba, K.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Aliouche, Z.

AU - Alvarez Cartelle, P.

AU - Amalric, R.

AU - Amato, S.

AU - Amey, J. L.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andersson, M.

AU - Andreianov, A.

AU - Andreola, P.

AU - Andreotti, M.

AU - Andreou, D.

AU - Anelli, A.

AU - Ao, D.

AU - Archilli, F.

AU - Argenton, M.

AU - Arguedas Cuendis, S.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bacher, D.

AU - Bachiller Perea, I.

AU - Bachmann, S.

AU - Bachmayer, M.

AU - Back, J. J.

AU - Baladron Rodriguez, P.

AU - Balagura, V.

AU - Fleuret, F.

AU - Maurice, E.

PY - 2024/6/1

Y1 - 2024/6/1

N2 - The decays Λb 0→Λc +D¯(∗)0K- and Λb 0→Λc +Ds ∗- are observed for the first time, in proton-proton collision data at s=13TeV, corresponding to an integrated luminosity of 5.4fb-1 collected with the LHCb detector. Their ratios of branching fractions with respect to the Λb 0→Λc +Ds - mode are measured to be (Formula presented.) where the first uncertainties are statistical, the second systematic, and the third, for the Λb 0→Λc +D¯(∗)0K- decays, are due to the uncertainties on the branching fractions of the Ds -→K-K+π- and D¯0→K+π- decay modes. The measured branching fractions probe factorization assumptions in effective theories and provide the normalization for future pentaquark searches in Λb 0→Λc +D¯(∗)0K- decay channels.

AB - The decays Λb 0→Λc +D¯(∗)0K- and Λb 0→Λc +Ds ∗- are observed for the first time, in proton-proton collision data at s=13TeV, corresponding to an integrated luminosity of 5.4fb-1 collected with the LHCb detector. Their ratios of branching fractions with respect to the Λb 0→Λc +Ds - mode are measured to be (Formula presented.) where the first uncertainties are statistical, the second systematic, and the third, for the Λb 0→Λc +D¯(∗)0K- decays, are due to the uncertainties on the branching fractions of the Ds -→K-K+π- and D¯0→K+π- decay modes. The measured branching fractions probe factorization assumptions in effective theories and provide the normalization for future pentaquark searches in Λb 0→Λc +D¯(∗)0K- decay channels.

UR - https://www.scopus.com/pages/publications/85201023451

U2 - 10.1140/epjc/s10052-024-12752-3

DO - 10.1140/epjc/s10052-024-12752-3

M3 - Article

AN - SCOPUS:85201023451

SN - 1434-6044

VL - 84

JO - European Physical Journal C

JF - European Physical Journal C

IS - 6

M1 - 575