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Measurement of the X(3872) production cross section via decays to J/ψπ(+)π(−)in pp collisions at s√=7 TeV
Baringer, Philip S. Bean, Alice Benelli, Gabriele Kenny, R. P., III Murray, Michael J. Noonan, Danny Sanders, Stephen J. Stringer, Robert W. Tinti, Gemma Wood, Jeffrey Scott
Baringer, Philip S.
Bean, Alice
Benelli, Gabriele
Kenny, R. P., III
Murray, Michael J.
Noonan, Danny
Sanders, Stephen J.
Stringer, Robert W.
Tinti, Gemma
Wood, Jeffrey Scott
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Abstract
The production of the X(3872) is studied in pp collisions at s√=7 TeV, 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 4.8 fb(−1). The measurements are performed in a kinematic range in which the X(3872) candidates have a transverse momentum 10 < p (T) < 50 GeV 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 p T. 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 p T is extracted. The π(+)π(−) mass spectrum of the J/ψπ(+)π(−) system in the X(3872) decays is also investigated.
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This is the publisher's version, also available electronically from http://link.springer.com/article/10.1007%2FJHEP04%282013%29154.
Date
2013-04-29
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Springer Berlin Heidelberg
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Keywords
Hadron-Hadron Scattering
Citation
S. Chatrchyan et al. (The CMS Collaboration). (2013), "Measurement of the X(3872) production cross section via decays to J/ψπ(+)π(−)in pp collisions at s√=7 TeV." Journal of High Energy Physics, 04(2013):154. http://www.dx.doi.org/10.1007/JHEP04(2013)154.