Correlations, multiplicity distributions, and the ridge in pp and p-Pb collisions

E-ISSN： 2100-014x|141|issue|01006-01006

ISSN： 2100-014x

Source： EPJ Web of Conference, Vol.141, Iss.issue, 2017-04, pp. : 01006-01006

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Abstract

Measurements made by the ALICE Collaboration of single- and two-particle distributions in high-energy pp and p–Pb collisions are used to characterize the interactions in small collision systems, tune models of particle production in QCD, and serve as a baseline for heavy-ion observables. The measurements of charged-particle multiplicity density, 〈dN_ch / dη〉, and multiplicity distributions are shown in pp and p–Pb collisions, including data from the top center-of-mass energy achieved at the Large Hadron Collider (LHC), √S = 13 TeV. Two-particle angular correlations in p–Pb collisions are studied in detail to investigate long-range correlations in pseudorapidity which are reminiscent of structures previously thought unique to heavy-ion collisions.