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Measurement of the ratio B(B⁰s → J/ψf0(980))/B(B⁰s → J/ψφ(1020)) in pp collisions at √s=7 TeV

CMS Collaboration; Khachatryan, V.; Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Friedl, M.; Frühwirth, R.; Ghete, V.M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; Kiesenhofer, W.; Knünz, V.; Krammer, M.; Krätschmer, I.; Liko, D.; Mikulec, I.; ... mehr

Abstract (englisch):
A measurement of the ratio of the branching fractions of the View the MathML sourceBs0 meson to J/ψf0(980)J/ψf0(980) and to J/ψϕ(1020)J/ψϕ(1020) is presented. The J/ψJ/ψ, f0(980)f0(980), and ϕ(1020)ϕ(1020) are observed through their decays to μ+μ−μ+μ−, π+π−π+π−, and K+K−K+K−, respectively. The f0f0 and the ϕ are identified by requiring |Mπ+π−−974 MeV|<50 MeV|Mπ+π−−974 MeV|<50 MeV and |MK+K−−1020 MeV|<10 MeV|MK+K−−1020 MeV|<10 MeV. The analysis is based on a data sample of pp collisions at a centre-of-mass energy of 7 TeV, collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 5.3 fb−1. The measured ratio is View the MathML sourceB(Bs0→J/ψf0)B(f0→π+π−)B(Bs0→J/ψϕ)B(ϕ→K+K−)=0.140±0.008(stat)±0.023(syst), where the first uncertainty is statistical and the second is systematic.

Zugehörige Institution(en) am KIT Institut für Experimentelle Kernphysik (IEKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1016/j.physletb.2016.02.047
ISSN: 0370-2693
URN: urn:nbn:de:swb:90-540588
KITopen ID: 1000054058
Erschienen in Physics Letters B
Band 756
Seiten 84-102
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
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