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!

Photons as probes of gluon saturation in p+A 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 Electromagnetic and weak probes Poster Session


Oscar Garcia Montero (Karl-Ruprechts-Universität Heidelberg)


We compute the cross section for photons emitted from a $q\bar{q}$ pair produced from gluon splitting in proton-nucleus (p+A) collisions at ultra-relativistic energies [1]. The computation is performed within the dilute-dense kinematics of the Color Glass Condensate (CGC) effective theory. Although the result obtained is formally at next-to-leading order in the CGC power counting, it provides at higher energies the dominant contribution for central rapidities.
We present the first numerical results for the photon cross-section including both the leading order terms computed previously [2,3] supplemented by novel next-to-leading results [4]. We compare the relative contributions of the LO and the NLO terms at different collider energies, and present detailed comparisons to data from RHIC and LHC on p+p and p/d+A collisions.

[1] S. Benic, K. Fukushima, O. Garcia-Montero, R. Venugopalan, JHEP 1701 (2017) 115
[2] J. Jalilian-Marian and A.H. Rezaeian, Phys. Rev. D 86 (2012) 034016
[3] B. Ducloué, T. Lappi, H. Mäntysaari, arXiv: 1710.02206
[4] S. Benic, K. Fukushima, O. Garcia-Montero, R. Venugopalan, (In preparation)

Content type Theory
Centralised submission by Collaboration Presenter name already specified

Primary authors

Sanjin Benic Kenji Fukushima (The University of Tokyo) Oscar Garcia Montero (Karl-Ruprechts-Universität Heidelberg) Raju Venugopalan (Brookhaven National Laboratory)

Presentation Materials