Search for the X(4140) state in B+->J/psi phi K.sup.+./sup. decays with the D0 detector

Abazov, V. M.; Abbott, B.; Acharya, B.S.; Kupčo, Alexander; Lokajíček, Miloš

doi:https://dx.doi.org/10.1103/PhysRevD.89.012004

Number of the records: 1

Search for the X(4140) state in B+->J/psi phi K.sup.+./sup. decays with the D0 detector

1.

SYSNO ASEP	0434093
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Search for the X(4140) state in B+->J/psi phi K⁺ decays with the D0 detector
Author(s)	Abazov, V. M. (RU) Abbott, B. (US) Acharya, B.S. (IN) Kupčo, Alexander (FZU-D)_{RID, ORCID} Lokajíček, Miloš (FZU-D)_{RID, ORCID}
Number of authors	359
Source Title	Physical Review D: Particles, Fields, Gravitation and Cosmology. - : American Physical Society - ISSN 1550-7998 Roč. 89, č. 1 (2014), "012004-1"-"012004-8"
Number of pages	8 s.
Language	eng - English
Country	US - United States
Keywords	D0 ; B decay ; J/psi(3100) ; Batavia TEVATRON Coll ; branching ratio ; enhancement ; statistical
Subject RIV	BF - Elementary Particles and High Energy Physics
R&D Projects	LG12006 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	FZU-D - RVO:68378271
UT WOS	000331867700001
EID SCOPUS	84894322444
DOI	10.1103/PhysRevD.89.012004
Annotation	We investigate the decay B^+ -> J/psi phi K^+ in a search for the X(4140) state, a narrow threshold resonance in the J/psi phi system. The data sample corresponds to an integrated luminosity of 10.4 fb^{-1} of ppbar collisions at sqrt s =1.96 TeV collected by the D0 experiment at the Fermilab Tevatron collider. We observe a mass peak with a statistical significance of 3.1 standard deviations and measure its invariant mass to be M=4159.0 +-.3 (stat) +- 6.6 (syst) MeV and its width to be Gamma= 19.9+-12.6 (stat)}^{+1.0}_{-8.0} (syst) MeV. Identifying this mass peak as the X(4140), we measure, for M(J/psi phi) <4.59 GeV, the relative branching fraction B_rel= B(B^+ -> X(4140) K^+)/ B(B^+ ->J/psi phi K^+) to be 21+-8 (stat) +- 4 (syst)%. In addition, the data can accommodate the presence of a second enhancement at a mass of 4328.5+- 12.0 MeV.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2015

Number of the records: 1