Amplitude analysis of the radiative decay Bs0 → K+K-γ

The LHCb collaboration

doi:10.1007/JHEP08(2024)093

Amplitude analysis of the radiative decay Bs0 → K+K-γ

The LHCb collaboration

National Institute for Subatomic Physics
University of Warwick
University of Zurich
University of Liverpool
Syracuse University
University of Santiago de Compostela
University of Bristol
Uppsala University
CERN
University of Michigan, Ann Arbor
Université Clermont Auvergne
University of Cincinnati
National Institute for Nuclear Physics
TU Dortmund University
University of Glasgow
University of Manchester
University of Cambridge
Sorbonne Université
Universidade Federal do Rio de Janeiro
Université Paris-Saclay
Peking University
University of Milan - Bicocca
University of Chinese Academy of Sciences
University of Rome Tor Vergata
Consejo Nacional de Rectores (CONARE)
CPPM
Massachusetts Institute of Technology
Laboratoire Leprince-Ringuet
University of Oxford
Université Savoie Mont Blanc
Heidelberg University
Swiss Federal Institute of Technology Lausanne
University of Florence
Pontifícia Universidade Católica do Rio de Janeiro
University of Edinburgh
RWTH Aachen University
CAS - Institute of High Energy Physics
Centro Brasileiro de Pesquisas Físicas
Ramon Llull University
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Imperial College London
Maastricht University
University of Ferrara
University of Padua
Wuhan University
University of Barcelona
Facultad de Ciencias Fisicas
University of Bologna
University of Genoa
University of Milan
NASU - Institute of Nuclear Research
University of A Coruna
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Autonomous University of Honduras
Los Alamos National Laboratory
Hunan University
University of Cagliari
University of Groningen
Centro Federal de Educação Tecnológica Celso Suckow da Fonseca
University of Bari
Central China Normal University
Eötvös Loránd University
Tsinghua University
University College Dublin
South China Normal University
Cracow University of Technology
Rutherford Appleton Laboratory
University of Bonn
Monash University
University of Perugia
University of Maryland, College Park
National Centre for Nuclear Research
Universidade de Brasília
University of Pisa
University of Valencia
Universidad Nacional de Colombia
University of Birmingham
NASU - Kharkov Institute of Physics and Technology
Vrije Universiteit Amsterdam
Scuola Normale Superiore di Pisa
AGH University of Krakow
Lanzhou University
Henan University
Excellence Cluster ORIGINS
University of Bergamo
Departement de Physique Nucleaire (SPhN)
University of Basilicata
Max Planck Institute for Nuclear Physics
University of Siena
University of Alcalá
University of Urbino

Research output: Contribution to journal › Article › peer-review

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Abstract

A search for radiative decay of B_s⁰ mesons to orbitally excited K⁺K⁻ states is performed using proton proton collisions recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb⁻¹. The dikaon spectrum in the mass range m_KK < 2400 MeV/c² is dominated by the ϕ(1020) resonance that accounts for almost 70% of the decay rate. Considering the possible contributions of f₂(1270), f₂^′(1525) and f₂(2010) meson states, the overall tensor contribution to the amplitude is measured to be (Formula presented.) mostly dominated by the f₂^′(1525) state. Several statistically equivalent solutions are obtained for the detailed resonant structure depending on whether the smaller amplitudes interfere destructively or constructively with the dominant amplitude. The preferred solution that corresponds to the lowest values of the fit fractions along with constructive interference leads to the relative branching ratio measurement (Formula presented.) where the last uncertainty is due to the ratio of measured branching fractions to the K⁺K⁻ final state. This result represents the first observation of the radiative B_s⁰→f₂^′1525γ decay, which is the second radiative transition observed in the B_s⁰ sector.

Original language	English
Article number	93
Number of pages	39
Journal	Journal of High Energy Physics
Volume	2024
Issue number	8
DOIs	https://doi.org/10.1007/JHEP08(2024)093 https://doi.org/10.1007/JHEP08(2024)093
State	Published - 13 Aug 2024
Externally published	Yes

Keywords

B Physics
Flavour Physics
Hadron-Hadron Scattering
Rare Decay

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@article{4a920c20a3a1462891c1f4681c39c8a7,

title = "Amplitude analysis of the radiative decay Bs0 → K+K-γ",

abstract = "A search for radiative decay of Bs0 mesons to orbitally excited K+K− states is performed using proton proton collisions recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. The dikaon spectrum in the mass range mKK < 2400 MeV/c2 is dominated by the ϕ(1020) resonance that accounts for almost 70\% of the decay rate. Considering the possible contributions of f2(1270), f2′(1525) and f2(2010) meson states, the overall tensor contribution to the amplitude is measured to be (Formula presented.) mostly dominated by the f2′(1525) state. Several statistically equivalent solutions are obtained for the detailed resonant structure depending on whether the smaller amplitudes interfere destructively or constructively with the dominant amplitude. The preferred solution that corresponds to the lowest values of the fit fractions along with constructive interference leads to the relative branching ratio measurement (Formula presented.) where the last uncertainty is due to the ratio of measured branching fractions to the K+K− final state. This result represents the first observation of the radiative Bs0→f2′1525γ decay, which is the second radiative transition observed in the Bs0 sector.",

keywords = "B Physics, Flavour Physics, Hadron-Hadron Scattering, Rare Decay",

author = "\{The LHCb collaboration\} and R. Aaij and Abdelmotteleb, \{A. S.W.\} and \{Abellan Beteta\}, C. and F. Abudin{\'e}n and T. Ackernley and Adefisoye, \{A. A.\} 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 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 \{Calderon Ramirez\}, S. and \{Castro Godinez\}, J.",

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

year = "2024",

month = aug,

day = "13",

doi = "10.1007/JHEP08(2024)093",

language = "Ingl{\'e}s",

volume = "2024",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

number = "8",

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TY - JOUR

T1 - Amplitude analysis of the radiative decay Bs0 → K+K-γ

AU - The LHCb collaboration

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Abellan Beteta, C.

AU - Abudinén, F.

AU - Ackernley, T.

AU - Adefisoye, A. A.

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 - 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 - Calderon Ramirez, S.

AU - Castro Godinez, J.

PY - 2024/8/13

Y1 - 2024/8/13

N2 - A search for radiative decay of Bs0 mesons to orbitally excited K+K− states is performed using proton proton collisions recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. The dikaon spectrum in the mass range mKK < 2400 MeV/c2 is dominated by the ϕ(1020) resonance that accounts for almost 70% of the decay rate. Considering the possible contributions of f2(1270), f2′(1525) and f2(2010) meson states, the overall tensor contribution to the amplitude is measured to be (Formula presented.) mostly dominated by the f2′(1525) state. Several statistically equivalent solutions are obtained for the detailed resonant structure depending on whether the smaller amplitudes interfere destructively or constructively with the dominant amplitude. The preferred solution that corresponds to the lowest values of the fit fractions along with constructive interference leads to the relative branching ratio measurement (Formula presented.) where the last uncertainty is due to the ratio of measured branching fractions to the K+K− final state. This result represents the first observation of the radiative Bs0→f2′1525γ decay, which is the second radiative transition observed in the Bs0 sector.

AB - A search for radiative decay of Bs0 mesons to orbitally excited K+K− states is performed using proton proton collisions recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. The dikaon spectrum in the mass range mKK < 2400 MeV/c2 is dominated by the ϕ(1020) resonance that accounts for almost 70% of the decay rate. Considering the possible contributions of f2(1270), f2′(1525) and f2(2010) meson states, the overall tensor contribution to the amplitude is measured to be (Formula presented.) mostly dominated by the f2′(1525) state. Several statistically equivalent solutions are obtained for the detailed resonant structure depending on whether the smaller amplitudes interfere destructively or constructively with the dominant amplitude. The preferred solution that corresponds to the lowest values of the fit fractions along with constructive interference leads to the relative branching ratio measurement (Formula presented.) where the last uncertainty is due to the ratio of measured branching fractions to the K+K− final state. This result represents the first observation of the radiative Bs0→f2′1525γ decay, which is the second radiative transition observed in the Bs0 sector.

KW - B Physics

KW - Flavour Physics

KW - Hadron-Hadron Scattering

KW - Rare Decay

UR - https://www.scopus.com/pages/publications/85201553756

U2 - 10.1007/JHEP08(2024)093

DO - 10.1007/JHEP08(2024)093

M3 - Artículo

AN - SCOPUS:85201553756

SN - 1029-8479

VL - 2024

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 8

M1 - 93

ER -

Amplitude analysis of the radiative decay Bs0 → K+K-γ

Abstract

Keywords

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