Studies of dijet transverse momentum balance and pseudorapidity distributions in pPb collisions at √s[subscript NN] = 5.02 TeV
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Chatrchyan-2014-Studies of dijet tra.pdf
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Author(s)
Apyan, Aram
Busza, Wit
Cali, Ivan Amos
Chan, M.
Di Matteo, Leonardo
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Gulhan, Doga Can
Klute, Markus
Lai, Yue Shi
Date Issued
July 2014
Journal
The European Physical Journal C
Publisher
Springer-Verlag
Citation
Chatrchyan, S., V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “Studies of Dijet Transverse Momentum Balance and Pseudorapidity Distributions in pPb Collisions at √s[subscript NN] = 5.02 TeV.” Eur. Phys. J. C 74, no. 7 (July 2014). © CERN for the benefit of the CMS collaboration
Version
Final published version
Abstract
Dijet production has been measured in pPb collisions at a nucleon–nucleon centre-of-mass energy of 5.02 TeV . A data sample corresponding to an integrated luminosity of 35 nb[superscript −1] was collected using the Compact Muon Solenoid detector at the Large Hadron Collider. The dijet transverse momentum balance, azimuthal angle correlations, and pseudorapidity distributions are studied as a function of the transverse energy in the forward calorimeters ( E[4<|η|<5.2 over T] ). For pPb collisions, the dijet transverse momentum ratio and the width of the distribution of dijet azimuthal angle difference are comparable to the same quantities obtained from a simulated pp reference and insensitive to E[4<|η|<5.2 over T] . In contrast, the mean value of the dijet pseudorapidity is found to change monotonically with increasing E[4<|η|<5.2 over T] , indicating a correlation between the energy emitted at large pseudorapidity and the longitudinal motion of the dijet frame. The pseudorapidity distribution of the dijet system in minimum bias pPb collisions is compared with next-to-leading-order perturbative QCD predictions obtained from both nucleon and nuclear parton distribution functions, and the data more closely match the latter.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. School of Science
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DOI of Published Version
https://doi.org/10.1140/epjc/s10052-014-2951-y
