Transverse Momentum Fluctuations in Longitudinal Asymmetric System.

Correlation measurements in nuclear collisions provide new information on the interplay of dissipation and fluctuations in the quark gluon plasma. Viscous diffusion and thermal noise can broaden the rapidity dependence of two-particle transverse momentum correlations. In this presentation we develop a new method for computing these correlations using the second order Israel-Stewart hydrodynamic with stochastic noise. We further expand this method invoking third order diffusion equations to enforce causality and generalization to asymmetric system. We compare new calculations to recent measurements by the ALICE collaboration at the LHC and the STAR collaboration at RHIC.