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)