The first full amplitude analysis of B+→J/ψφK+ 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 φK+, 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 X(4140) state.

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2017). Observation of J /ψφ Structures Consistent with Exotic States from Amplitude Analysis of B+ →j /ψφK+ Decays. PHYSICAL REVIEW LETTERS, 118(2), 022003 [10.1103/PhysRevLett.118.022003].

Observation of J /ψφ Structures Consistent with Exotic States from Amplitude Analysis of B+ →j /ψφK+ Decays

BELLOLI, NICOLETTA;Borsato, M;CALVI, MARTA;CARNITI, PAOLO;CASSINA, LORENZO;FAZZINI, DAVIDE;GOTTI, CLAUDIO;GRILLO, LUCIA;Martinelli, M;Petruzzo, M;
2017

Abstract

The first full amplitude analysis of B+→J/ψφK+ 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 φK+, 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 X(4140) state.
Articolo in rivista - Articolo scientifico
Physics and Astronomy (all)
English
2017
118
2
022003
022003
none
Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2017). Observation of J /ψφ Structures Consistent with Exotic States from Amplitude Analysis of B+ →j /ψφK+ Decays. PHYSICAL REVIEW LETTERS, 118(2), 022003 [10.1103/PhysRevLett.118.022003].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/153528
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