Production of leading charged particles and leading charged-particle jets at small transverse momenta in pp collisions at √s=8 TeV

Khachatryan, V. and Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Filipovic, Nicolas and Bencze, György and Hajdu, Csaba and Hidas, Pál and Horváth, Dezső and Siklér, Ferenc and Veszprémi, Viktor and Vesztergombi, György and Zsigmond, Anna Júlia and Karancsi, János and Molnár, József and Pálinkás, József and Makovec, Alajos and Trócsányi, Zoltán and Ujvári, Balázs and Veres, Gábor (2015) Production of leading charged particles and leading charged-particle jets at small transverse momenta in pp collisions at √s=8 TeV. PHYSICAL REVIEW D, 92 (11). ISSN 2470-0010

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Abstract

The per-event yield of the highest transverse momentum charged particle and charged-particle jet, integrated above a given pmin T threshold starting at pmin T = 0.8 and 1 GeV, respectively, is studied in pp collisions at √s = 8 TeV. The particles and the jets are measured in the pseudorapidity ranges |η| < 2.4 and 1.9, respectively. The data are sensitive to the momentum scale at which parton densities saturate in the proton, to multiple partonic interactions, and other key aspects of the transition between the soft and hard QCD regimes in hadronic collisions.

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