Resonant structures in the dipion mass spectrum from χc1(3872) → π+ π− J/ψ decays, produced via B+ → K+ χc1(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 χc1(3872) → ω J/ψ decay is established for the first time, (21.4 ± 2.3 ± 2.0)%, with a significance of more than 7.1 σ. The amplitude of isospin violating decay, χc1(3872) → ρ0 J/ψ, relative to isospin conserving decay, χc1(3872) → ω J/ψ, is properly determined, and it is a factor of 6 larger than expected for a pure charmonium state.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudin{\'e}n, F., Ackernley, T., Adeva, B., et al. (2023). Observation of Sizeable ω Contribution to χc1(3872) → π+ π− J/ψ Decays. PHYSICAL REVIEW D, 108(1), 1-12 [10.1103/PhysRevD.108.L011103].

Observation of Sizeable ω Contribution to χc1(3872) → π+ π− J/ψ Decays

Carbone, A.;Ferrari, F.;Galli, D.;Manuzzi, D.;Patrignani, C.;Villa, A.;Zucchelli, S.;
2023

Abstract

Resonant structures in the dipion mass spectrum from χc1(3872) → π+ π− J/ψ decays, produced via B+ → K+ χc1(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 χc1(3872) → ω J/ψ decay is established for the first time, (21.4 ± 2.3 ± 2.0)%, with a significance of more than 7.1 σ. The amplitude of isospin violating decay, χc1(3872) → ρ0 J/ψ, relative to isospin conserving decay, χc1(3872) → ω J/ψ, is properly determined, and it is a factor of 6 larger than expected for a pure charmonium state.
2023
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudin{\'e}n, F., Ackernley, T., Adeva, B., et al. (2023). Observation of Sizeable ω Contribution to χc1(3872) → π+ π− J/ψ Decays. PHYSICAL REVIEW D, 108(1), 1-12 [10.1103/PhysRevD.108.L011103].
Aaij, R.; Abdelmotteleb, A.S.W.; Abellan Beteta, C.; Abudin{\'e}n, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala,...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/952656
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