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.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., et al. (2014). Evidence for the decay X(3872)→ψ(2S)γ. NUCLEAR PHYSICS. B, 886, 665-680 [10.1016/j.nuclphysb.2014.06.011].

Evidence for the decay X(3872)→ψ(2S)γ

Borsato, M;CALVI, MARTA;CASSINA, LORENZO;GOTTI, CLAUDIO;KHANJI, BASEM;KUCHARCZYK, MARCIN;Martinelli, M;
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.
Articolo in rivista - Articolo scientifico
Nuclear and High Energy Physics
English
2014
886
665
680
none
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., et al. (2014). Evidence for the decay X(3872)→ψ(2S)γ. NUCLEAR PHYSICS. B, 886, 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/10281/89000
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