The first four-dimensional amplitude analysis of the B+ → ψ(2S)K0Sπ+ decay is performed with proton-proton collision data collected by the LHCb experiment at √s = 13 TeV, corresponding to an integrated luminosity of 5.4 fb−1. The data cannot be fully explained by B+ → ψ(2S)K*+ contributions alone. A significantly better description of the data is obtained by adding a T+cc contribution decaying to ψ(2S)π+. The properties of the T+cc structure are consistent with the exotic state Tcc1(4430)+ reported in the isospin-related B0 → ψ(2S)K−π+ decay. Effects of a possible Tcc1(4430)+ → D*1 (2600)0D+ decay mode on the Tcc1(4430)+ → ψ(2S)π+ mass distribution are investigated through a Flatté parametrization, providing constraints on the relative decay strength. A description of the Tcc1(4430)+ structure using the triangle singularity mechanism is studied and also found to be consistent with the data.

Aaij, R., Abdelmotteleb, A., Beteta, C., Abudinen, F., Ackernley, T., Adefisoye, A., et al. (2026). Observation and Investigation of the Tcc1(4430)+ Structure in B+ → ψ(2S)K0Sπ+ Decays. PHYSICAL REVIEW D, 113(7), 1-13 [10.1103/RCFS-YNH2].

Observation and Investigation of the Tcc1(4430)+ Structure in B+ → ψ(2S)K0Sπ+ Decays

Anelli A.;Borsato M.;Calvi M.;Capelli S.;Carniti P.;Falcao L. N.;Fazzini D.;Gotti C.;Kirsebom V. S.;Malentacca L.;Martinazzoli L.;Martinelli M.;Minotti A.;Pizzichemi M.;Salomoni M.;
2026

Abstract

The first four-dimensional amplitude analysis of the B+ → ψ(2S)K0Sπ+ decay is performed with proton-proton collision data collected by the LHCb experiment at √s = 13 TeV, corresponding to an integrated luminosity of 5.4 fb−1. The data cannot be fully explained by B+ → ψ(2S)K*+ contributions alone. A significantly better description of the data is obtained by adding a T+cc contribution decaying to ψ(2S)π+. The properties of the T+cc structure are consistent with the exotic state Tcc1(4430)+ reported in the isospin-related B0 → ψ(2S)K−π+ decay. Effects of a possible Tcc1(4430)+ → D*1 (2600)0D+ decay mode on the Tcc1(4430)+ → ψ(2S)π+ mass distribution are investigated through a Flatté parametrization, providing constraints on the relative decay strength. A description of the Tcc1(4430)+ structure using the triangle singularity mechanism is studied and also found to be consistent with the data.
Lettera in rivista
Astronomy; Astrophysics; Physics; Particles; Fields
English
7-apr-2026
2026
113
7
1
13
L071101
none
Aaij, R., Abdelmotteleb, A., Beteta, C., Abudinen, F., Ackernley, T., Adefisoye, A., et al. (2026). Observation and Investigation of the Tcc1(4430)+ Structure in B+ → ψ(2S)K0Sπ+ Decays. PHYSICAL REVIEW D, 113(7), 1-13 [10.1103/RCFS-YNH2].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/609585
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