Amplitude analysis of B+ -> J/psi phi K+ decays

Bonivento W.;Dettori F.;Lai A.;Manca G.;Oldeman R.;Saitta B.;
2017-01-01

Abstract

The first full amplitude analysis of B+ -> J/psi phi K+ with J/psi -> mu(+)mu(-) phi -> K+K- decays is performed with a data sample of 3 fb(-1) of pp collision data collected at root s = 7, 8 TeV with the LHCb detector. The data cannot be described by a model that contains only excited kaon states decaying into phi K+, four J/psi phi 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)+ -> phi K+ transition.
2017
Inglese
95
1
28
Esperti anonimi
internazionale
scientifica
Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Cartelle P., Alvarez; Alv ...espandi
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
757
open
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