Study of charmonium and charmonium-like contributions in B+ → J/ψηK+ decays

Mick Mulder; K. De Bruyn; C. J. G. Onderwater; M. van Veghel; LHCb Collaboration

doi:10.1007/JHEP04(2022)046

Study of charmonium and charmonium-like contributions in B+ → J/ψηK+ decays

Mick Mulder, K. De Bruyn, C. J. G. Onderwater, M. van Veghel, LHCb Collaboration

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Abstract

A study of B+ → J/ψηK+ decays, followed by J/ψ → μ+μ− and η → γγ, is performed using a dataset collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. The J/ψη mass spectrum is investigated for contributions from charmonia and charmonium-like states. Evidence is found for the B+ → (ψ2(3823) → J/ψη)K+ and B+ → (ψ(4040) → J/ψη)K+ decays with significance of 3.4 and 4.7 standard deviations, respectively. This constitutes the first evidence for the ψ2(3823) → J/ψη decay.

Original language	English
Article number	46
Number of pages	29
Journal	Journal of High Energy Physics
Volume	2022
Issue number	4
DOIs	https://doi.org/10.1007/JHEP04(2022)046
Publication status	Published - 8-Apr-2022

Keywords

B Physics
Branching fraction
Hadron-Hadron Scattering
Quarkonium
X(3872)

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@article{5cd52e80d87a4122977e8a92890d28a9,

title = "Study of charmonium and charmonium-like contributions in B+ → J/ψηK+ decays",

abstract = "A study of B+ → J/ψηK+ decays, followed by J/ψ → μ+μ− and η → γγ, is performed using a dataset collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. The J/ψη mass spectrum is investigated for contributions from charmonia and charmonium-like states. Evidence is found for the B+ → (ψ2(3823) → J/ψη)K+ and B+ → (ψ(4040) → J/ψη)K+ decays with significance of 3.4 and 4.7 standard deviations, respectively. This constitutes the first evidence for the ψ2(3823) → J/ψη decay.",

keywords = "B Physics, Branching fraction, Hadron-Hadron Scattering, Quarkonium, X(3872)",

author = "R. Aaij and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and L. Dufour and Mick Mulder and {De Bruyn}, K. and Onderwater, {C. J. G.} and A. Pellegrino and S. Tolk and {van Veghel}, M. and {LHCb Collaboration}",

note = "Publisher Copyright: {\textcopyright} 2022, The Author(s).",

year = "2022",

month = apr,

day = "8",

doi = "10.1007/JHEP04(2022)046",

language = "English",

volume = "2022",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer",

number = "4",

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TY - JOUR

T1 - Study of charmonium and charmonium-like contributions in B+ → J/ψηK+ decays

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Dufour, L.

AU - Mulder, Mick

AU - De Bruyn, K.

AU - Onderwater, C. J. G.

AU - Pellegrino, A.

AU - Tolk, S.

AU - van Veghel, M.

AU - LHCb Collaboration

PY - 2022/4/8

Y1 - 2022/4/8

N2 - A study of B+ → J/ψηK+ decays, followed by J/ψ → μ+μ− and η → γγ, is performed using a dataset collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. The J/ψη mass spectrum is investigated for contributions from charmonia and charmonium-like states. Evidence is found for the B+ → (ψ2(3823) → J/ψη)K+ and B+ → (ψ(4040) → J/ψη)K+ decays with significance of 3.4 and 4.7 standard deviations, respectively. This constitutes the first evidence for the ψ2(3823) → J/ψη decay.

AB - A study of B+ → J/ψηK+ decays, followed by J/ψ → μ+μ− and η → γγ, is performed using a dataset collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb−1. The J/ψη mass spectrum is investigated for contributions from charmonia and charmonium-like states. Evidence is found for the B+ → (ψ2(3823) → J/ψη)K+ and B+ → (ψ(4040) → J/ψη)K+ decays with significance of 3.4 and 4.7 standard deviations, respectively. This constitutes the first evidence for the ψ2(3823) → J/ψη decay.

KW - B Physics

KW - Branching fraction

KW - Hadron-Hadron Scattering

KW - Quarkonium

KW - X(3872)

U2 - 10.1007/JHEP04(2022)046

DO - 10.1007/JHEP04(2022)046

M3 - Article

SN - 1029-8479

VL - 2022

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 4

M1 - 46

ER -

Study of charmonium and charmonium-like contributions in B+ → J/ψηK+ decays

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