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

http://repository.vnu.edu.vn/handle/VNU_123/29779

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 and 8 TeV with the LHCb detector.

 The data cannot be described by a model that contains only excited kaon states decaying into phi K+, and 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.

Title:	Amplitude analysis of B+ -> J/psi phi K+ decays
Authors:	Aaij, R. Adeva, B. Adinolfi, M.
Keywords:	GEV/C PARTICLES SPIN
Issue Date:	2017
Publisher:	AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Citation:	ISIKNOWLEDGE
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 and 8 TeV with the LHCb detector. The data cannot be described by a model that contains only excited kaon states decaying into phi K+, and 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.
Description:	TNS07074 ; PHYSICAL REVIEW D Volume: 95 Issue: 1 Article Number: 012002 Published: JAN 11 2017
URI:	http://repository.vnu.edu.vn/handle/VNU_123/29779
ISSN:	2470-0010 2470-0029
Appears in Collections:	Bài báo của ĐHQGHN trong Web of Science