ar X iv : n uc l - th / 0 40 30 40 v 1 1 5 M ar 2 00 4 Photon production from non - equilibrium QGP in heavy ion collisions

نویسندگان

  • F Gelis
  • H Niemi
  • P V Ruuskanen
  • S S Räsänen
چکیده

We present a calculation of thermal photon production i.e. photons from secondary interactions among particles produced in heavy ion collisions at collider energies. This is done within the framework of hydrodynamics. We take into account the lack of chemical equilibrium in QGP. It turns out that main effects from chemical non-equilibrium composition of QGP, reduction of particle number and increase in temperature, nearly cancel in photon spectrum.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

ar X iv : n uc l - th / 0 40 30 36 v 1 1 4 M ar 2 00 4 Recombination Models

We review the current status of recombination and coalescence models that have been successfully applied to describe hadronization in heavy ion collisions at RHIC energies. Basic concepts as well as actual implementations of the idea are discussed. We try to evaluate where we stand in our understanding at the moment and what remains to be done in the future.

متن کامل

ar X iv : n uc l - th / 9 40 40 05 v 1 5 A pr 1 99 4 On the M T scaling of dilepton spectra in high energy heavy ion collisions

The so-called M T scaling for dilepton spectra at RHIC energies is examined. It is seen that a proper accounting of the complete set of dilepton producing processes forces us to abandon the proposed scaling around M T = 2.6 GeV, which has been put forward as a possible signature of the presence of quark-matter. Any substantial transverse expansion in the QGP phase itself will also offset this s...

متن کامل

ar X iv : n uc l - th / 0 30 50 64 v 1 2 1 M ay 2 00 3 CHAPTER 1 Hydrodynamical description of collective flow

I review how hydrodynamical flow is related to the observed flow in ul-trarelativistic heavy ion collisions and how initial conditions, equation of state and freeze-out temperature affect flow in hydrodynamical models.

متن کامل

ar X iv : n uc l - th / 0 61 01 28 v 1 3 1 O ct 2 00 6 Factorization for hadronic heavy quarkonium production ⋆ Jian

We briefly review several models of heavy quarkonium production in hadronic collisions, and discuss the status of QCD factorization for these production models.

متن کامل

ar X iv : n uc l - th / 0 41 20 37 v 2 7 M ar 2 00 5 Transport Theories for Heavy Ion Collisions in the 1 AGeV Regime

We compare multiplicities as well as rapidity and transverse momentum distributions of protons, pions and kaons calculated within presently available transport approaches for heavy ion collisions around 1 AGeV. For this purpose, three reactions have been selected: Au+Au at 1 and 1.48 AGeV and Ni+Ni at 1.93 AGeV.

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2004