We present the measurements of particle pair yields per trigger particle ob- tained from di-hadron azimuthal correlations in pp collisions at √s = 0.9, 2.76, and 7 TeV recorded with the ALICE detector. The yields are studied as a function of the charged particle multiplicity. Taken together with the single particle yields the pair yields pro- vide information about parton fragmentation at low transverse momenta, as well as on the contribution of multiple parton interactions to particle production. Data are compared to calculations using the PYTHIA6, PYTHIA8, and PHOJET event generators.
Multiplicity dependence of two-particle azimuthal correlations in pp collisions at the LHC
ARNALDI, Roberta;BALA, RENU;BEOLE', Stefania;BERZANO, DARIO CARLO DOMENICO;BIANCHI, LIVIO;BOTTA, Elena;BRUNA, ELENA;BUFALINO, STEFANIA;FERRETTI, Alessandro;GAGLIARDI, Martino;GALLIO, Mauro;INNOCENTI, GIAN MICHELE;LEONCINO, MARCO;MASERA, Massimo;MILANO, LEONARDO;OPPEDISANO, Chiara;RAMELLO, Luciano;RUSSO, RICCARDO;SITTA, Mario;VALLERO, Sara;VERCELLIN, Ermanno;
2013-01-01
Abstract
We present the measurements of particle pair yields per trigger particle ob- tained from di-hadron azimuthal correlations in pp collisions at √s = 0.9, 2.76, and 7 TeV recorded with the ALICE detector. The yields are studied as a function of the charged particle multiplicity. Taken together with the single particle yields the pair yields pro- vide information about parton fragmentation at low transverse momenta, as well as on the contribution of multiple parton interactions to particle production. Data are compared to calculations using the PYTHIA6, PYTHIA8, and PHOJET event generators.File in questo prodotto:
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