@misc{10481/58807,
year = {2019},
month = {1},
url = {http://hdl.handle.net/10481/58807},
abstract = {We present an analytical calculation of the covariance of the energy-momentum
tensor associated to the gluon  eld produced in ultra-relativistic heavy ion collisions at early
times, the Glasma. This object involves the two-point and single-point correlators of the
energy-momentum tensor (〈Tμν (x⊥)Tσρ(y⊥)〉 and 〈Tμν (x⊥)〉, respectively)) at proper time
T = 0+. Our approach is based on the Color Glass Condensate effective theory, which allows
us to map the 
uctuations of the valence color sources in the colliding nuclei to those
of the energy-momentum tensor of the produced gluon  elds via the solution of the classical
equations of motion in the presence of external currents. The color sources in the two colliding
nuclei are characterized by Gaussian correlations, albeit in more generality than in the
McLerran-Venugopalan model, allowing for non-trivial impact parameter and transverse
dependence of the two-point correlator. We compare our results to those obtained under
the Glasma Graph approximation,  nding agreement in the limit of short transverse separations.
However, important differences arise at larger transverse separations, where our
result displays a slower fall-off than the Glasma Graph result (1=r2 vs. 1=r4 power-law decay),
indicating that the color screening of the correlations in the transverse plane occurs at
distances larger than 1=Qs by a logarithmic factor sensitive to the infrared. In the Glasma

ux tube picture, this implies that the color domains are larger than originally estimated.},
organization = {We thank Tuomas Lappi and Jean-Yves Ollitrault for illuminating discussions on various
aspects of this project. The work of JLA and PGR is partially funded by a FP7-
PEOPLE-2013-CIG Grant of the European Commission, reference QCDense/631558, and
by the MINECO project FPA2016-78220 of the Spanish Government. The work of CM
was supported in part by the Agence Nationale de la Recherche under the project ANR-
16-CE31-0019-02. PGR also acknowledges  nancial support from the `La Caixa' Banking
Foundation.},
publisher = {Springer Nature},
keywords = {Heavy Ion Phenomenology},
title = {Initial correlations of the Glasma energy-momentum tensor},
doi = {10.1007/JHEP01(2019)073},
author = {López Albacete, Javier and Guerrero Rodríguez, Pablo and Marquet, Cyrille},
}