The first observation of the Bs0→ (χc1(3872) → J/ψπ+π−)π+π− decay is reported using proton-proton collision data, corresponding to integrated luminosities of 1, 2 and 6 fb−1, collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, respectively. The ratio of branching fractions relative to the Bs0→ (ψ(2S) → J/ψπ+π−)π+π− decay is measured to be (Formula presented.) where the first uncertainty is statistical and the second systematic. The mass spectrum of the π+π− system recoiling against the χc1(3872) meson exhibits a large contribution from Bs0→ χc1(3872) (f0(980) → π+π−) decays.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2023). Observation of the Bs0→ χc1(3872)π+π− decay. JOURNAL OF HIGH ENERGY PHYSICS, 2023(7) [10.1007/JHEP07(2023)084].

Observation of the Bs0→ χc1(3872)π+π− decay

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

Abstract

The first observation of the Bs0→ (χc1(3872) → J/ψπ+π−)π+π− decay is reported using proton-proton collision data, corresponding to integrated luminosities of 1, 2 and 6 fb−1, collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, respectively. The ratio of branching fractions relative to the Bs0→ (ψ(2S) → J/ψπ+π−)π+π− decay is measured to be (Formula presented.) where the first uncertainty is statistical and the second systematic. The mass spectrum of the π+π− system recoiling against the χc1(3872) meson exhibits a large contribution from Bs0→ χc1(3872) (f0(980) → π+π−) decays.
Articolo in rivista - Articolo scientifico
B Physics; Hadron-Hadron Scattering; Quarkonium; Spectroscopy;
English
11-lug-2023
2023
2023
7
84
open
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2023). Observation of the Bs0→ χc1(3872)π+π− decay. JOURNAL OF HIGH ENERGY PHYSICS, 2023(7) [10.1007/JHEP07(2023)084].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/466529
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