2007/12/31 by GH Liu, G. H. Liu, Y. G. +9
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1016/j.physletb.2008.04.037
published as Phys. Lett. B 663 (2008) 312 · 7 pages, 4 figures; accepted by Physics Letters B
arxiv created 2008/04/24 · openalex publication_date 2008/04/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/02
Hard photon emitted from energetic heavy ion collisions is of very interesting since it does not experience the late-stage nuclear interaction, therefore it is useful to explore the early-stage information of matter phase. In this work, we have presented a first calculation of azimuthal asymmetry, characterized by directed transverse flow parameter F and elliptic asymmetry coefficient v2, for proton–neutron bremsstrahlung hard photons in intermediate energy heavy-ion collisions. The positive F and negative v2 of direct photons are illustrated and they seem to be anti-correlated to the corresponding free proton's flow.