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Title: Observation of sizeable ω contribution to χ c 1 ( 3872 ) π + π - J / ψ decays

Journal Article · · Physical Review. D.
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Resonant structures in the dipion mass spectrum from $$χ$$c1(3872) → π+π-J/ψ decays, produced via B+ → K+$$χ$$c1(3872) decays, are analyzed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb-1. A sizeable contribution from the isospin conserving $$χ$$c1(3872) → ωJ/ψ decay is established for the first time, (21.4 ± 2.3 ± 2.0)%, with a significance of more than 7.1σ. The amplitude of isospin violating decay, $$χ$$c1(3872) → ρ0J/ψ, relative to isospin conserving decay, $$χ$$c1(3872) → ωJ/ψ, is properly determined, and it is a factor of 6 larger than expected for a pure charmonium state.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE
Contributing Organization:
LHCb Collaboration
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2423037
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 1 Vol. 108; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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