2007/01/23 by Tadaaki Isobe, T Isobe · 39 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Nuclear matter #Particle physics theoretical and experimental studies #Parton #Photon #Production (economics) #Quantum Chromodynamics and Particle Interactions #State of matter #Transverse plane #nucl-ex
paper · pdf · doi:10.1088/0954-3899/34/8/s146
published in Journal of Physics G Nuclear and Particle Physics 34(8), S1015-S1018 (IOP Publishing) · 4 pages, 4 figures. Invited parallel talk at The 19th International Conference On Ultra relativistic Nucleus-Nucleus Collisions (Quark Matter 2006), Shanghai China, Nov. 14-20, 2006
arxiv created 2007/01/23 · openalex publication_date 2007/07/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
When studying the initial state and evolution of the matter created in relativistic heavy ion collisions, high- p T direct photons are a powerful probe. They are created in initial hard processes and in parton fragmentation, and possibly in interactions of partons with the hot and dense medium. We present systematic measurements of high- p T direct photon production in GeV p+p and Au+Au collisions. The nuclear modification factor of direct photons is shown for 5 < p T < 18 GeV/ c , and at very high transverse momenta it seems to be below unity in the most central Au+Au collisions.