Evidence for the decay mode X(3872)→ψ(2S)γ in B +→X(3872)K + decays is found with a significance of 4.4 standard deviations. The analysis is based on a data sample of proton-proton collisions, corresponding to an integrated luminosity of 3 fb-1, collected with the LHCb detector, at centre-of-mass energies of 7 and 8 TeV. The ratio of the branching fraction of the X(3872)→ψ(2S)γ decay to that of the X(3872)→J/ψγ decay is measured to beB(X(3872)→ψ(2S)γ)B(X(3872)→J/ψγ)=2.46±0.64±0.29, where the first uncertainty is statistical and the second is systematic. The measured value does not support a pure DD-* molecular interpretation of the X(3872) state. © 2014 CERN for the benefit of the LHCb Collaboration.

Evidence for the decay X(3872)→ψ(2S)γ / R., A., B., A., M., A., A., A., Z., A., J., A., F., A., M., A., S., A., G., A., P. A., C., A. a., A., S., A., S., A., Y., A., L., A.n., L. b., A., J., A., R., A., M. b., A., et al.. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - STAMPA. - 886:(2014), pp. 665-680. [10.1016/j.nuclphysb.2014.06.011]

Evidence for the decay X(3872)→ψ(2S)γ

G. Casse;SARTI, ALESSIO;SCIUBBA, Adalberto;
2014

Abstract

Evidence for the decay mode X(3872)→ψ(2S)γ in B +→X(3872)K + decays is found with a significance of 4.4 standard deviations. The analysis is based on a data sample of proton-proton collisions, corresponding to an integrated luminosity of 3 fb-1, collected with the LHCb detector, at centre-of-mass energies of 7 and 8 TeV. The ratio of the branching fraction of the X(3872)→ψ(2S)γ decay to that of the X(3872)→J/ψγ decay is measured to beB(X(3872)→ψ(2S)γ)B(X(3872)→J/ψγ)=2.46±0.64±0.29, where the first uncertainty is statistical and the second is systematic. The measured value does not support a pure DD-* molecular interpretation of the X(3872) state. © 2014 CERN for the benefit of the LHCb Collaboration.
2014
01 Pubblicazione su rivista::01a Articolo in rivista
Evidence for the decay X(3872)→ψ(2S)γ / R., A., B., A., M., A., A., A., Z., A., J., A., F., A., M., A., S., A., G., A., P. A., C., A. a., A., S., A., S., A., Y., A., L., A.n., L. b., A., J., A., R., A., M. b., A., et al.. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - STAMPA. - 886:(2014), pp. 665-680. [10.1016/j.nuclphysb.2014.06.011]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/665064
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