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2023

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/221786

Observation of sizeable ω contribution to χ c1ð3872Þ → π + π − J=ψ decays

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https://doi.org/10.1103/PhysRevD.108.L011103

Abstract

Resonant structures in the dipion mass spectrum from χc1ð3872Þ → πþπ−J=ψ decays, produced via Bþ → Kþχc1ð3872Þ 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 χc1ð3872Þ → ωJ=ψ decay is established for the first time, ð21.4 2.3 2.0Þ%, with a significance of more than 7.1σ. The amplitude of isospin violating decay, χc1ð3872Þ → ρ0J=ψ, relative to isospin conserving decay, χc1ð3872Þ → ωJ=ψ, is properly determined, and it is a factor of 6 larger than expected for a pure charmonium state.

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Quarks, Hadrons, Mesons (Física nuclear)

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Quarks, Hadrons, Mesons (Nuclear physics)

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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GARCIA MORENO, Paula, et al. Observation of sizeable ω contribution to χ c1ð3872Þ → π + π − J=ψ decays. Physical Review D. 2023. Vol. 108, num. L011103. ISSN 2470-0010. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/221786

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