An amplitude analysis of B0 → J/ψ ϕ K0S decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 9 fb^−1, collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. Evidence with a significance of 4.0 standard deviations of a structure in the J/ψ K0S system, named T_ψs1^θ(4000)0, is seen, with its mass and width measured to be 3991{−10}{+12}{−17}{+9} MeV/c^2 and 105{−25}{+29}{−23}{+17} MeV, respectively, where the first uncertainty is statistical and the second systematic. The T_ψs1^θ(4000)0 state is likely to be the isospin partner of the T_ψs1^θ(4000)+ state, previously observed in the J/ψ K+ system of the B+ → J/ψ ϕ K+ decay. When isospin symmetry for the charged and neutral T_ψs1^θ(4000) states is assumed, the signal significance increases to 5.4 standard deviations.

Aaij R., Abdelmotteleb A.S.W., Abellan Beteta C., Abudinen F., Ackernley T., Adeva B., et al. (2023). Evidence of a J/ψ K0S Structure in B0 → J/ψ ϕ K0S Decays. PHYSICAL REVIEW LETTERS, 131(13), 1-11 [10.1103/PhysRevLett.131.131901].

Evidence of a J/ψ K0S Structure in B0 → J/ψ ϕ K0S Decays

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

Abstract

An amplitude analysis of B0 → J/ψ ϕ K0S decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 9 fb^−1, collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. Evidence with a significance of 4.0 standard deviations of a structure in the J/ψ K0S system, named T_ψs1^θ(4000)0, is seen, with its mass and width measured to be 3991{−10}{+12}{−17}{+9} MeV/c^2 and 105{−25}{+29}{−23}{+17} MeV, respectively, where the first uncertainty is statistical and the second systematic. The T_ψs1^θ(4000)0 state is likely to be the isospin partner of the T_ψs1^θ(4000)+ state, previously observed in the J/ψ K+ system of the B+ → J/ψ ϕ K+ decay. When isospin symmetry for the charged and neutral T_ψs1^θ(4000) states is assumed, the signal significance increases to 5.4 standard deviations.
2023
Aaij R., Abdelmotteleb A.S.W., Abellan Beteta C., Abudinen F., Ackernley T., Adeva B., et al. (2023). Evidence of a J/ψ K0S Structure in B0 → J/ψ ϕ K0S Decays. PHYSICAL REVIEW LETTERS, 131(13), 1-11 [10.1103/PhysRevLett.131.131901].
Aaij R.; Abdelmotteleb A.S.W.; Abellan Beteta C.; Abudinen F.; Ackernley T.; Adeva B.; Adinolfi M.; Adlarson P.; 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/11585/953501
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