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Measurement of the X(3872) production cross section via decays to J/Psi pi+pi- in pp collisions at root s = 7 TeV

Abstract: The production of the X(3872) is studied in pp collisions at ?s = 7TeV, using decays to J/??+??, where the J/? decays to two muons. The data were recorded by the CMS experiment and correspond to an integrated luminosity of 4.8fb?1. The measurements are performed in a kinematic range in which the X(3872) candidates have a transverse momentum 10 < pT < 50GeV and rapidity |y| < 1.2. The ratio of the X(3872) and ? (2S) cross sections times their branching fractions into J/??+?? is measured as a function of pT. In addition, the fraction of X(3872) originating from B decays is determined. From these measurements the prompt X(3872) differential cross section times branching fraction as a function of pT is extracted. The ?+?? mass spectrum of the J/??+?? system in the X(3872) decays is also investigated.

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

Fuente: Journal of High Energy Physics, 2013, 4, 154

Publisher: Springer Verlag

Publication date: 01/04/2013

No. of pages: 39

Publication type: Article

DOI: 10.1007/JHEP04(2013)154

ISSN: 1126-6708,1029-8479

Publication Url: https://doi.org/10.1007/JHEP04(2013)154

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