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

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

The production of the X(3872) is studied in pp collisions at √s = 7 TeV, using decays to J/ψπ[superscript] + π[superscript −], 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[superscript −1]. The measurements are per...

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Bibliographic Details
Main Authors: CMS Collaboration, Apyan, Aram, Bauer, Gerry P, Bendavid, Joshua L., Busza, Wit, Butz, Erik M., Cali, Ivan Amos, Dutta, Valentina, Gomez-Ceballos, Guillelmo, Goncharov, Maxim, Klute, Markus, Krajczar, Krisztian F., Levin, Andrew Michael, Luckey Jr, P David, Ma, Teng, Nahn, Steven, Paus, Christoph M. E., Ralph, Duncan Kelley, Roland, Christof E, Roland, Gunther M, Rudolph, Matthew Scott, Stephans, George S. F., Stoeckli, Fabian, Sumorok, Konstanty C, Sung, Kevin Kai Hong, Velicanu, Dragos Alexandru, Wenger, Edward Allen, Wolf, Roger, Wyslouch, Boleslaw, Yang, Ming, Yilmaz, Yetkin, Yoon, A. S., Zanetti, Marco, Wyslouch, Victoria, Chan, M., Kim, Y.
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Published: Springer Nature 2018
Online Access:http://hdl.handle.net/1721.1/116099
https://orcid.org/0000-0002-9418-6656
https://orcid.org/0000-0002-3831-9071
https://orcid.org/0000-0002-0869-5631
https://orcid.org/0000-0002-1136-6900
https://orcid.org/0000-0002-6047-4211
https://orcid.org/0000-0001-8983-2169
https://orcid.org/0000-0003-3106-4894
https://orcid.org/0000-0002-1260-777X
https://orcid.org/0000-0003-3681-0649
https://orcid.org/0000-0002-2850-9007
Description
Summary:The production of the X(3872) is studied in pp collisions at √s = 7 TeV, using decays to J/ψπ[superscript] + π[superscript −], 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[superscript −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[superscript] + π[superscript −] 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[superscript] + π[superscript −] mass spectrum of the J/ψπ[superscript] + π[superscript −] system in the X(3872) decays is also investigated. Keyword: Hadron-Hardon Scattering

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