The first full amplitude analysis of B+ → J/ψ ϕ K+ with J/ψ → μ+ μ− , ϕ → K+ K− decays is performed with a data sample of 3 fb^−1 of pp collision data collected at √s = 7 and 8 TeV with the LHCb detector. The data cannot be described by a model that contains only excited kaon states decaying into ϕ K+, and four J/ψ ϕ structures are observed, each with significance over 5 standard deviations. The quantum numbers of these structures are determined with significance of at least 4 standard deviations. The lightest has mass consistent with, but width much larger than, previous measurements of the claimed X(4140) state. The model includes significant contributions from a number of expected kaon excitations, including the first observation of the K∗(1680)+ → ϕ K+ transition.

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2017). Amplitude Analysis of B+ → J/ψ ϕ K+ Decays. PHYSICAL REVIEW D, 95(1), 1-28 [10.1103/PhysRevD.95.012002].

Amplitude Analysis of B+ → J/ψ ϕ K+ Decays

BETTI, FEDERICO;Capriotti, L.;CARBONE, ANGELO;FERRARI, FABIO;GALLI, DOMENICO;MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;ZUCCHELLI, STEFANO
2017

Abstract

The first full amplitude analysis of B+ → J/ψ ϕ K+ with J/ψ → μ+ μ− , ϕ → K+ K− decays is performed with a data sample of 3 fb^−1 of pp collision data collected at √s = 7 and 8 TeV with the LHCb detector. The data cannot be described by a model that contains only excited kaon states decaying into ϕ K+, and four J/ψ ϕ structures are observed, each with significance over 5 standard deviations. The quantum numbers of these structures are determined with significance of at least 4 standard deviations. The lightest has mass consistent with, but width much larger than, previous measurements of the claimed X(4140) state. The model includes significant contributions from a number of expected kaon excitations, including the first observation of the K∗(1680)+ → ϕ K+ transition.
2017
Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2017). Amplitude Analysis of B+ → J/ψ ϕ K+ Decays. PHYSICAL REVIEW D, 95(1), 1-28 [10.1103/PhysRevD.95.012002].
Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Cartelle, P.; Alv...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/576133
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