# Workshop on Resummation, Evolution, Factorization (REF 2019)

Nov 25 – 29, 2019
University of Pavia
Europe/Rome timezone

## Phenomenology of Sudakov Resummation in the CGC Framework

Nov 28, 2019, 3:00 PM
20m
Aula Foscolo (University of Pavia)

### Speaker

Shu-yi Wei (ECT*)

### Description

We calculate and compare the differential cross sections for forward $Z^0$-boson production at small transverse momentum, in proton-proton and proton-nucleus collisions, using both the collinear and dilute-dense factorization frameworks. In both cases, we implement a Sudakov resummation of the large logarithms generated by soft-gluon emissions, which is essential in order to describe the transverse momentum distribution of forward $Z^0$ bosons measured at the Tevatron and the LHC. We further compute the nuclear modification factor in the dilute-dense framework, hoping to single out signals of saturation effects at small values of $x$. Our predictions are compared with those obtained in the collinear factorization framework, using two different nuclear parton distribution functions.

arXiv:1909.08572