Measurement of the X(3872) production cross section via decays to J/ψπ+π in pp collisions at √s = 7 TeV

S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, E. Aguilo, T. Bergauer, M. Dragicevic, J. Erö, C. Fabjan, M. Friedl, R. Frühwirth, V. M. Ghete, N. Hörmann, J. Hrubec, M. Jeitler, W. Kiesenhofer, V. Knünz, M. Krammer, I. KrätschmerD. Liko, I. Mikulec, M. Pernicka, D. Rabady, B. Rahbaran, C. Rohringer, H. Rohringer, R. Schöfbeck, J. Strauss, A. Taurok, W. Waltenberger, C. E. Wulz, V. Mossolov, N. Shumeiko, J. Suarez Gonzalez, M. Bansal, S. Bansal, T. Cornelis, E. A. De Wolf, X. Janssen, S. Luyckx, L. Mucibello, S. Ochesanu, B. Roland, R. Rougny, M. Selvaggi, H. Van Haevermaet, P. Van Mechelen, N. Van Remortel, A. Radi, The CMS Collaboration

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

The production of the X(3872) is studied in pp collisions at √s = 7TeV, using decays to J/ψπ+π, where the J/ψ 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 ψ (2S) cross sections times their branching fractions into J/ψπ+π 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 π+π mass spectrum of the J/ψπ+π system in the X(3872) decays is also investigated.

Original languageEnglish
Article number154
JournalJournal of High Energy Physics
Volume2013
Issue number4
DOIs
Publication statusPublished - Apr 29 2013

Keywords

  • Hadron-Hadron Scattering

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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