Photon-tagged correlations in heavy-ion collisions: kinematic requirements and a case study

Abstract

Photon-tagged correlations may be useful to determine how the dense partonic medium produced in heavy-ion collisions affects the fragmentation of high-energy quarks and gluons into a leading hadron. In these proceedings, I discuss the kinematic requirements for the hadron and the prompt photon transverse momentum cuts. A case study at LHC energy, tagging on p_T > 20 GeV and p_T > 50 GeV photons, is then briefly examined.

Comments: 4 pages, 2 figures. To appear in the proceedings of the 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (QM2006), Shanghai, China, 14-20 November 2006