Observation of sizeable ω contribution to χ c 1 ( 3872 ) → π + π - J / ψ decays
Journal Article
·
· Physical Review. D.
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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