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

Isolated photon production in proton-nucleus collisions at forward rapidity

May 15, 2018, 12:30 PM
Sala Volpi, 1st Floor (Palazzo del Casinò)

Sala Volpi, 1st Floor

Palazzo del Casinò

Parallel Talk Initial state physics and approach to equilibrium Initial state physics and approach to equilibrium


Tuomas Lappi (University of Jyvaskyla)


We calculate isolated photon production at forward rapidities in proton-nucleus collisions in the Color Glass Condensate framework [1]. Our calculation uses dipole cross sections solved from the running coupling Balitsky-Kovchegov equation with an initial condition fit to deep inelastic scattering data and extended to nuclei with an optical Glauber procedure that introduces no additional parameters beyond the basic nuclear geometry. We present predictions for future forward RHIC and LHC measurements. The predictions are also compared to updated results for the nuclear modification factors for pion production, Drell-Yan dileptons and J/Psi mesons in the same forward kinematics, consistently calculated in the same theoretical framework. We find that leading order, running coupling high energy evolution in the CGC picture leads to a significant nuclear suppression at forward rapidities. This nuclear suppression is stronger for photons than for pions. We also discuss how this might change with next-to-leading order high energy evolution.

[1] Isolated photon production in proton-nucleus collisions at forward rapidity, B. Ducloué, T. Lappi, H. Mäntysaari, arXiv:1710.02206 [hep-ph]

Centralised submission by Collaboration Presenter name already specified
Content type Theory

Primary author

Tuomas Lappi (University of Jyvaskyla)


Bertrand Ducloue (IPhT Saclay) Heikki Mäntysaari (University of Jyväskylä)

Presentation materials