Speaker
David Englert
(Wigner RCP, Budapest (HU))
Description
Two-particle angular correlations are studied between identified pions, kaons, protons and unidentified charged particles in pPb collisions with an integrated luminosity of approximately 35 nb$^{−1}$ at a nucleon-nucleon center-of-mass energy of 5.02 TeV by the CMS experiment. The particles are identified via their energy loss in the silicon tracker. In order to eliminate short-range correlations we impose a wide $\Delta \eta$ gap of at least two units. The long-range azimuthal correlations are characterized by the second-order ($v_2$, elliptic flow) and third-order ($v_3$, triangular flow) anisotropy harmonics. The anisotropy harmonics are measured as a function of transverse momentum and wide range of particle multiplicity, which is made possible by the dedicated high-multiplicity triggers implemented in CMS. The new results can help further differentiate between the competing models that aim to explain the origin of the ridge effect.
| On behalf of collaboration: | CMS |
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Author
David Englert
(Wigner RCP, Budapest (HU))
