Measurement of the ratio B(B[0,s] to J/psi f0(980) )/B(B[0,s] to J/psi phi(1020)) in pp collisions at sqrt(s) = 7 TeV

Abstract : The ratio R(f0/phi) of the branching fractions of the B[0,s] meson to the CP-odd eigenstate J/psi f0(980) and to J/psi phi(1020) is measured, where J/psi to mu+ mu-, f0 to pi+ pi-, and phi to K+ K-. 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, corresponding to an integrated luminosity of 5.3 inverse femtobarns. The result is R(f0/phi) = 0.140 +/- 0.013 +/- 0.018, where the first uncertainty is statistical and the second is systematic. This result is consistent with theoretical predictions and previous measurements of R(f0/phi). It is the most precise measurement of the ratio to date.
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Physics Letters B, Elsevier, 2016, 756, pp.84-102. 〈10.1016/j.physletb.2016.02.047〉
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http://hal.in2p3.fr/in2p3-01128673
Contributeur : Dominique Girod <>
Soumis le : mardi 10 mars 2015 - 11:10:26
Dernière modification le : jeudi 10 mai 2018 - 02:00:21

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V. Khachatryan, M. Besancon, F. Couderc, M. Dejardin, D. Denegri, et al.. Measurement of the ratio B(B[0,s] to J/psi f0(980) )/B(B[0,s] to J/psi phi(1020)) in pp collisions at sqrt(s) = 7 TeV. Physics Letters B, Elsevier, 2016, 756, pp.84-102. 〈10.1016/j.physletb.2016.02.047〉. 〈in2p3-01128673〉

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