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Measurement of the ? b cross section and the ?- b to ? b ratio with J/?? decays in pp collisions at s=7 TeV

Abstract: ABSTRACT: The ?b differential production cross section and the cross section ratio ?(?b)/?(?b) are measured as functions of transverse momentum p?b T and rapidity |y?b | in pp collisions at ?s = 7 TeV using data collected by the CMS experiment at the LHC. The measurements are based on ?b decays reconstructed in the exclusive final state J/??, with the subsequent decays J/? ? ?+?? and ? ? p?, using a data sample corresponding to an integrated luminosity of 1.9 fb?1. The product ?(?b) × B(?b ? J/??) versus p?b T falls faster than that of b mesons. The measured value of ?(?b) × B(?b ? J/??) for p?b T > 10 GeV and |y?b | < 2.0 is 1.16 ± 0.06 ± 0.12 nb, and the integrated ?(?b)/?(?b) ratio is 1.02 ± 0.07 ± 0.09, where the uncertainties are statistical and systematic, respectively

Authorship: Chatrchyan S., Khachatryan V., Sirunyan A.M., Tumasyan A., Adam W., Bergauer T., Dragicevic M., Erö J., Fabjan C., Friedl M., Frühwirth R., Ghete V.M., Hammer J., Hörmann N., Hrubec J., Jeitler M., Kiesenhofer W., Knünz V., Krammer M., Liko D., Mikulec I., Pernicka M., Rahbaran B., Rohringer C., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Wagner P., Waltenberger W., Walzel G., Widl E., Wulz C.E., Mossolov V., Shumeiko N.,

Fuente: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2012, 714 (2-5), 136-157

Publisher: Elsevier

Publication date: 01/06/2012

No. of pages: 22

Publication type: Article

DOI: 10.1016/j.physletb.2012.05.063

ISSN: 0370-2693,1873-2445

Publication Url: https://doi.org/10.1016/j.physletb.2012.05.063

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