Measurement of jet fragmentation in 5.02 TeV proton–lead and proton–proton collisions with the ATLAS detector
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A measurement of the fragmentation functions of jets into charged particles in collisions and pp collisions is presented. The analysis utilizes 28 nb−1 of data and 26 pb−1 of pp data, both at = 5.02 TeV, collected in 2013 and 2015, respectively, with the ATLAS detector at the LHC. The measurement is reported in the centre-of-mass frame of the nucleon–nucleon system for jets in the rapidity range ⁎ 1.6 and with transverse momentum 45 260 GeV. Results are presented both as a function of the charged-particle transverse momentum and as a function of the longitudinal momentum fraction of the particle with respect to the jet. The pp fragmentation functions are compared with results from Monte Carlo event generators and two theoretical models. The ratios of the to pp fragmentation functions are found to be consistent with unity.
CitationAaboud M, Aad G, Abbott B, Abdallah J, Abdinov OBo, Abeloos B, Abidi SH, AbouZeid H, Abraham NL, Abramowicz H, Buanes T, Dale Ø, Eigen G, Liebig W, Lipniacka A, Martin dit Latour B, Mæland S, Stugu B, Yang Z, Zalieckas J, Bugge MK, Cameron DG, Catmore JR, Feigl S, Franconi L, Garonne V, Gjelsten BK, Gramstad E, Morisbak V, Nilsen JK, Ould-Saada F, Raddum SH, Read AL, Røhne OM, Sandaker H, Serfon C, Stapnes S, Strandlie A, Abreu H, Abreu RF, Abulaiti Y, Acharya BS, Adachi S, Adamczyk L, Adelman J, Adersberger M, Adye T, Affolder AA, Agatonovic-Jovin T, Agheorghiesei C, ATLAS C. Measurement of jet fragmentation in 5.02 TeV proton–lead and proton–proton collisions with the ATLAS detector. Nuclear Physics A. 2018;978:65-106
CERN for the benefit of the ATLAS collaboration 2018