• Open Access

Two-pion femtoscopy in p-Pb collisions at sNN=5.02 TeV

J. Adam et al. (ALICE Collaboration)
Phys. Rev. C 91, 034906 – Published 24 March 2015

Abstract

We report the results of the femtoscopic analysis of pairs of identical pions measured in p-Pb collisions at sNN=5.02 TeV. Femtoscopic radii are determined as a function of event multiplicity and pair momentum in three spatial dimensions. As in the pp collision system, the analysis is complicated by the presence of sizable background correlation structures in addition to the femtoscopic signal. The radii increase with event multiplicity and decrease with pair transverse momentum. When taken at comparable multiplicity, the radii measured in p-Pb collisions, at high multiplicity and low pair transverse momentum, are 10%–20% higher than those observed in pp collisions but below those observed in AA collisions. The results are compared to hydrodynamic predictions at large event multiplicity as well as discussed in the context of calculations based on gluon saturation.

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  • Received 3 February 2015

DOI:https://doi.org/10.1103/PhysRevC.91.034906

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

©2015 CERN, for the ALICE Collaboration

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Vol. 91, Iss. 3 — March 2015

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