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    題名: Enhanced photon production from quark-gluon plasma : Finite-lifetime effect
    作者: Wang, Shang-Yung;Boyanovsky, Daniel
    貢獻者: 淡江大學物理學系
    日期: 2001-01
    上傳時間: 2013-07-09 15:07:22 (UTC+8)
    出版者: College Park: American Physical Society
    摘要: Photon production from a thermalized quark-gluon plasma of finite lifetime is studied directly in real time with a nonequilibrium formulation that includes off-shell (energy nonconserving) effects. To lowest order we find that production of direct photons form a quark-gluon plasma of temperature T ~ 200 MeV and lifetime t ~ 10-20 fm/c is strongly enhanced by off-shell (anti)quark bremsstrahlung q(\bar{q})->q(\bar{q})\gamma. The yield from this nonequilibrium finite-lifetime effect dominates over those obtained from higher order equilibrium rate calculations in the range of energy E > 2 GeV and falls off with a power law for E >> T.
    關聯: Physical Review D (Particles and Fields) 63(5), 051702(5 pages)
    DOI: 10.1103/PhysRevD.63.051702
    顯示於類別:[物理學系暨研究所] 期刊論文


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