The first full amplitude analysis of Bþ → J=ψϕKþ with J=ψ → μþμ−, ϕ → KþK− decays is performed with a data sample of 3 fb−1 of pp collision data collected at ffiffi s p ¼ 7 and 8 TeV with the LHCb detector. The data cannot be described by a model that contains only excited kaon states decaying into ϕKþ, and four J=ψϕ 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 Xð4140Þ state. The model includes significant contributions from a number of expected kaon excitations, including the first observation of the Kð1680Þþ → ϕKþ transition.

Amplitude analysis of B+ →j /ψφK+ decays / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 95:1(2017). [10.1103/PhysRevD.95.012002]

Amplitude analysis of B+ →j /ψφK+ decays

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2017

Abstract

The first full amplitude analysis of Bþ → J=ψϕKþ with J=ψ → μþμ−, ϕ → KþK− decays is performed with a data sample of 3 fb−1 of pp collision data collected at ffiffi s p ¼ 7 and 8 TeV with the LHCb detector. The data cannot be described by a model that contains only excited kaon states decaying into ϕKþ, and four J=ψϕ 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 Xð4140Þ state. The model includes significant contributions from a number of expected kaon excitations, including the first observation of the Kð1680Þþ → ϕKþ transition.
2017
B physics Charm physics Hadron-Hadron scattering (experiments) QCD Spectroscopy
01 Pubblicazione su rivista::01a Articolo in rivista
Amplitude analysis of B+ →j /ψφK+ decays / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 95:1(2017). [10.1103/PhysRevD.95.012002]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074606
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