Long range two-particle correlations with Ks0 and Λ in pPb collisions

Abstract

Abstract Measurements of two-particle angular correlations between identified strange hadrons ( K s 0 and Λ / Λ ¯ ) and unidentified charged particles, produced in pPb collisions, are presented over a wide range in pseudorapidity and full azimuth. Results are based on an integrated luminosity of approximately 35 nb − 1 collected during the 2013 LHC pPb run at a nucleon–nucleon center-of-mass energy of 5.02 TeV by the CMS experiment. K s 0 and Λ / Λ ¯ are reconstructed via the topology of their secondary decays. The observed long-range correlations of K s 0 and Λ / Λ ¯ are characterized by the second-order ( v 2 ) and third-order ( v 3 ) anisotropy harmonics, which are presented as a function of particle multiplicity and transverse momentum. Particle-species dependence of v 2 and v 3 is observed in a wide range of multiplicities in pPb events. Constituent quark scaling is observed within 10–15% for each multiplicity class for the v 2 and v 3 harmonics of K s 0 and Λ / Λ ¯ as a function of kinetic energy per quark.