3–7 Dec 2014
Embassy Suites Napa Valley, California
US/Pacific timezone

High order cumulants of azimuthal anisotropy in pA collisions from initial state physics

4 Dec 2014, 15:20
20m
Embassy Suites Napa Valley, California

Embassy Suites Napa Valley, California

Speaker

Vladimir Skokov (Western Michigan University)

Description

In this talk, using the hybrid formalism of the CGC to describe p+A collisions at high energies, we compute the azimuthal structure of the m-particle correlation function. We show that within the conventional CGC, the "flow" coefficient v_2{2} is real, while v_2{4} is complex (v_2^4{4} is negative). The analogous pattern holds for higher order cumulants. We argue that this result is also true for the so-called "glasma" graph. Phenomenological consequences of this finding are discussed. We also consider the case of anisotropic fluctuations of the saturation momentum of the target nucleus, and show that within this approach, v_2^4{4} changes sign as a functions of the anisotropy strength. This might explain the change of sign of c_2{4} as a function of multiplicity observed experimentally in p+Pb collisions at LHC energy.

Author

Vladimir Skokov (Western Michigan University)

Presentation materials