RT Journal Article
T1 Transverse-momentum-dependent gluon distributions from JIMWLK evolution
A1 Marquet, C.
A1 Petreska, Elena
A1 Roiesnel, C.
K1 Heavy Ion Phenomenology
K1 QCD Phenomenology
AB Transverse-momentum-dependent (TMD) gluon distributions have different operator definitions, depending on the process under consideration. We study that aspect of TMD factorization in the small-x limit, for the various unpolarized TMD gluon distributions encountered in the literature. To do this, we consider di-jet production in hadronic collisions, since this process allows to be exhaustive with respect to the possible operator definitions, and is suitable to be investigated at small x. Indeed, for forward and nearly back-to-back jets, one can apply both the TMD factorization and Color Glass Condensate (CGC) approaches to compute the di-jet cross-section, and compare the results. Doing so, we show that both descriptions coincide, and we show how to express the various TMD gluon distributions in terms of CGC correlators of Wilson lines, while keeping N c finite. We then proceed to evaluate them by solving the JIMWLK equation numerically. We obtain that at large transverse momentum, the process dependence essentially disappears, while at small transverse momentum, non-linear saturation effects impact the various TMD gluon distributions in very different ways. We notice the presence of a geometric scaling regime for all the TMD gluon distributions studied: the “dipole” one, the Weizsäcker-Williams one, and the six others involved in forward di-jet production
PB Springer
YR 2016
FD 2016-10-13
LK http://hdl.handle.net/10347/16316
UL http://hdl.handle.net/10347/16316
LA eng
NO Marquet, C., Petreska, E. & Roiesnel, C. J. High Energ. Phys. (2016) 2016: 65. https://doi.org/10.1007/JHEP10(2016)065
NO EP acknowledges support from: European Research Council grant HotLHC ERC-2011-StG-279579; Ministerio de Ciencia e Innovacion of Spain under project FPA2014-58293-C2-1-P; Xunta de Galicia (Conselleria de Educacion) within the Strategic Unit AGRUP2015/11
DS Minerva
RD 24 abr 2026