# Quark Matter 2018

13-19 May 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

## Forward Dihadron Angular Correlations in pA collisions

15 May 2018, 17:00
2h 40m
First floor and third floor (Palazzo del Casinò)

### First floor and third floor

#### Palazzo del Casinò

Poster Jet modifications and high-pT hadrons

### Speaker

Shu-yi Wei (Ecole Polytechnique)

### Description

Dihadron angular correlations in forward $pA$ collisions have been considered as one of the most sensitive observables to the gluon saturation effects. In general, both parton shower effects and saturation effects are responsible for the back-to-back dihadron angular de-correlations. Recent developments have allowed to incorporate the so-called parton shower effect, namely the Sudakov effect, into the small-$x$ formalism [1-3]. This, in particular, will enable us to go beyond the saturation dominant region, and conduct calculations for dihadron correlation in a much wider regime where both saturation effects and Sudakov effects are important.

In this paper [4], we carry out the first detailed numerical study in this regard, and find a very good agreement with previous RHIC $pp$ and $dAu$ data. This study can help us to establish a baseline in $pp$ collisions which contains little saturation effects, and further make predictions for dihadron angular correlations in $pAu$ collisions, which will allow to search for the signal of parton saturation.

[1] A. H. Mueller, B. W. Xiao and F. Yuan, Phys. Rev. D 88, 114010 (2013); Phys. Rev. Lett. 110, no. 8, 082301 (2013).

[2] P. Sun, C.-P. Yuan and F. Yuan, Phys. Rev. Lett. 113, no. 23, 232001 (2014); Phys. Rev. D 92, no. 9, 094007 (2015).

[3] A. H. Mueller, B. Wu, B. W. Xiao and F. Yuan, Phys. Rev. D 95, no. 3, 034007 (2017).

[4] A. Stasto, S. Y. Wei, B. W. Xiao and F. Yuan, to appear.

Content type Theory Presenter name already specified

### Primary authors

Anna Stasto (Penn State) Shu-yi Wei (Ecole Polytechnique) Bowen Xiao (Central China Normal University) Feng Yuan (LBNL)