An amplitude analysis of B0→J/ψφKS0 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/ψKS0 system, named Tψs1θ(4000)0, is seen, with its mass and width measured to be 3991-10+12 -17+9 MeV/c2 and 105-25+29 -23+17 MeV, respectively, where the first uncertainty is statistical and the second systematic. The Tψs1θ(4000)0 state is likely to be the isospin partner of the Tψs1θ(4000)+ state, previously observed in the J/ψK+ system of the B+→J/ψφK+ decay. When isospin symmetry for the charged and neutral Tψs1θ(4000) states is assumed, the signal significance increases to 5.4 standard deviations.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2023). Evidence of a J/ψ KS0 Structure in B0 →j/ψφ KS0 Decays. PHYSICAL REVIEW LETTERS, 131(13) [10.1103/PhysRevLett.131.131901].

Evidence of a J/ψ KS0 Structure in B0 →j/ψφ KS0 Decays

Borsato M.;Calvi M.;Capelli S.;Carniti P.;Fazzini D.;Garcia Pardinas J.;Gotti C.;Kirsebom V. S.;Martinazzoli L.;Martinelli M.;Meloni S.;Minotti A.;Petruzzo M.;Pizzichemi M.;Salomoni M.;Shields E. B.;
2023

Abstract

An amplitude analysis of B0→J/ψφKS0 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/ψKS0 system, named Tψs1θ(4000)0, is seen, with its mass and width measured to be 3991-10+12 -17+9 MeV/c2 and 105-25+29 -23+17 MeV, respectively, where the first uncertainty is statistical and the second systematic. The Tψs1θ(4000)0 state is likely to be the isospin partner of the Tψs1θ(4000)+ state, previously observed in the J/ψK+ system of the B+→J/ψφK+ decay. When isospin symmetry for the charged and neutral Tψs1θ(4000) states is assumed, the signal significance increases to 5.4 standard deviations.
Articolo in rivista - Articolo scientifico
0+ state; Amplitude analysis; Center-of-mass energies; Centre-of-mass energies; Integrated luminosity; Isospin; Proton proton collisions; Signal significance; Standard deviation; Uncertainty
English
2023
131
13
131901
none
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2023). Evidence of a J/ψ KS0 Structure in B0 →j/ψφ KS0 Decays. PHYSICAL REVIEW LETTERS, 131(13) [10.1103/PhysRevLett.131.131901].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/453934
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