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

The CMS collaboration

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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
Issue number4
Publication statusPublished - 29 Apr 2013
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2013, Springer Verlag. All rights reserved.


FundersFunder number
Not addedST/H00081X/2
National Science Foundation1151640, 0969555, 1205960, 1211067
Science and Technology Facilities CouncilST/L00609X/1, ST/J004901/1, ST/K001256/1, ST/K003844/1, ST/H000925/1, ST/F007434/1, ST/I505580/1, ST/I505572/1, ST/I005912/1, ST/J005665/1, ST/K001604/1, ST/K001639/1, ST/F007094/1
Schweizerischer Nationalfonds zur F&#x00F6;rderung der Wissenschaftlichen Forschung144921, 146398, 138111


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