Observation of the B+ → Jψη′K+ decay

LHCb collaboration; R.H. O'Neil; M. Richardson-Slipper; C. Vrahas

doi:10.1007/JHEP08(2023)174

Observation of the B+ → Jψη′K+ decay

LHCb collaboration, R.H. O'Neil, M. Richardson-Slipper, C. Vrahas

School of Physics and Astronomy

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

Abstract

The B+ → Jψη′K+ decay is observed for the first time using proton-proton
collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb−1. The branching fraction of this decay is measured relative to the known branching fraction of the B+ → ψ(2S)K+ decay and found to be
B(B+ → Jψη′K+)
B(B+ → ψ(2S)K+) = (4.91 ± 0.47 ± 0.29 ± 0.07) × 10−2,
where the first uncertainty is statistical, the second is systematic and the third is related to external branching fractions. A first look at the J/ψη′ mass distribution is performed and no signal of intermediate resonances is observed.

Original language	English
Article number	174
Pages (from-to)	1-26
Number of pages	26
Journal	Journal of High Energy Physics
Volume	2023
Issue number	8
DOIs	https://doi.org/10.1007/JHEP08(2023)174
Publication status	Published - 25 Aug 2023

Keywords / Materials (for Non-textual outputs)

B Physics
Branching fraction
Charm Physics
Hadron-Hadron Scattering

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10.1007/JHEP08(2023)174Licence: Creative Commons: Attribution (CC-BY)

http://arxiv.org/abs/2303.09443

1 Active
6 Finished

Beautiful Flavours: Discovering New Physics with B-hadrons and Tau-leptons
Barter, W. (Principal Investigator)
1/07/22 → 30/06/26
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/04/23 → 30/09/25
Project: Research
Next generation photodetectors for future applications
Oliva, F. (Principal Investigator)
1/12/22 → 30/11/25
Project: Research

Cite this

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title = "Observation of the B+ → Jψη′K+ decay",

abstract = "The B+ → Jψη′K+ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb−1. The branching fraction of this decay is measured relative to the known branching fraction of the B+ → ψ(2S)K+ decay and found to be B(B+ → Jψη′K+) B(B+ → ψ(2S)K+) = (4.91 ± 0.47 ± 0.29 ± 0.07) × 10−2, where the first uncertainty is statistical, the second is systematic and the third is related to external branching fractions. A first look at the J/ψη′ mass distribution is performed and no signal of intermediate resonances is observed.",

keywords = "B Physics, Branching fraction, Charm Physics, Hadron-Hadron Scattering",

author = "\{LHCb collaboration\} and William Barter and P.E.L. Clarke and S. Gambetta and F. Muheim and M. Needham and Mark Williams and Federico Betti and Robert Currie and S. Eisenhardt and Lavra, \{Lais Soares\} and Oliva Federica and Ozlem Ozcelik and Gediminas Sarpis and R.H. O'Neil and M. Richardson-Slipper and C. Vrahas",

year = "2023",

month = aug,

day = "25",

doi = "10.1007/JHEP08(2023)174",

language = "English",

volume = "2023",

pages = "1--26",

journal = " Journal of High Energy Physics",

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number = "8",

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TY - JOUR

T1 - Observation of the B+ → Jψη′K+ decay

AU - LHCb collaboration

AU - Barter, William

AU - Clarke, P.E.L.

AU - Gambetta, S.

AU - Muheim, F.

AU - Needham, M.

AU - Williams, Mark

AU - Betti, Federico

AU - Currie, Robert

AU - Eisenhardt, S.

AU - Lavra, Lais Soares

AU - Federica, Oliva

AU - Ozcelik, Ozlem

AU - Sarpis, Gediminas

AU - O'Neil, R.H.

AU - Richardson-Slipper, M.

AU - Vrahas, C.

PY - 2023/8/25

Y1 - 2023/8/25

N2 - The B+ → Jψη′K+ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb−1. The branching fraction of this decay is measured relative to the known branching fraction of the B+ → ψ(2S)K+ decay and found to be B(B+ → Jψη′K+) B(B+ → ψ(2S)K+) = (4.91 ± 0.47 ± 0.29 ± 0.07) × 10−2, where the first uncertainty is statistical, the second is systematic and the third is related to external branching fractions. A first look at the J/ψη′ mass distribution is performed and no signal of intermediate resonances is observed.

AB - The B+ → Jψη′K+ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb−1. The branching fraction of this decay is measured relative to the known branching fraction of the B+ → ψ(2S)K+ decay and found to be B(B+ → Jψη′K+) B(B+ → ψ(2S)K+) = (4.91 ± 0.47 ± 0.29 ± 0.07) × 10−2, where the first uncertainty is statistical, the second is systematic and the third is related to external branching fractions. A first look at the J/ψη′ mass distribution is performed and no signal of intermediate resonances is observed.

KW - B Physics

KW - Branching fraction

KW - Charm Physics

KW - Hadron-Hadron Scattering

U2 - 10.1007/JHEP08(2023)174

DO - 10.1007/JHEP08(2023)174

M3 - Article

SN - 1029-8479

VL - 2023

SP - 1

EP - 26

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 8

M1 - 174

ER -

Observation of the B+ → Jψη′K+ decay

Abstract

Keywords / Materials (for Non-textual outputs)

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Projects

Beautiful Flavours: Discovering New Physics with B-hadrons and Tau-leptons

Experimental Particle Physics at the University of Edinburgh

Next generation photodetectors for future applications

Cite this