ar X iv : h ep - p h / 01 02 19 2 v 1 1 5 Fe b 20 01 1 Dileptons and photons from central heavy - ion collisions at CERN - SPS
نویسندگان
چکیده
A unique parameterization of secondary (thermal) dilepton and photon yields in heavy-ion experiments at CERN-SPS is proposed. Adding those thermal yields to background contributions the spectral shapes of the CERES/NA45, NA38, NA50, HELIOS/3 and WA98 data from experiments with lead and sulfur beams can be well described.
منابع مشابه
ar X iv : h ep - p h / 01 12 28 9 v 1 2 1 D ec 2 00 1 OVERVIEW OF RELATIVISTIC HEAVY - ION PHYSICS
Selected topics in the field of relativistic heavy-ion collisions are reviewed from the 15 year research programme at the SPS at CERN and the AGS at BNL, and from the first run of the Relativistic Heavy-Ion Collider at BNL.
متن کاملar X iv : h ep - p h / 07 01 02 9 v 1 4 J an 2 00 7 Chemical Equilibrium in Heavy Ion Collisions : Rapidity Dependence
Particle yields in heavy ion collisions show an overwhelming evidence for chemical or relative chemical equilibrium at all beam energies. The rapidity dependence of the thermal parameters T and µ B can now be determined over a wide range of rapidities and show a systematic behavior towards an increase in µ B away from mid-rapidity.
متن کاملar X iv : h ep - p h / 03 11 02 0 v 1 3 N ov 2 00 3 System - Size Dependence of Strangeness Saturation
The final state in heavy-ion collisions has a higher degree of strangeness saturation than the one produced in collisions between elementary particles like p − p or p − ¯ p. A systematic analysis of this phenomenon is made for C − C, Si − Si and P b − P b collisions at the CERN SPS collider and for Au − Au collisions at RHIC and at AGS energies. Strangeness saturation is shown to increase smoot...
متن کاملar X iv : h ep - p h / 02 01 05 3 v 1 8 J an 2 00 2 Anomalous Production of Ω and Ω̄ is Evidence for the Formation of Disoriented Chiral Condensates ?
No conventional picture of nucleus-nucleus collisions has yet been able to explain the abundance of Ω and Ω̄ hadrons in central collisions between Pb nuclei at 158 A GeV at the CERN SPS. We argue that this is evidence that they are produced from topological defects in the form of skyrmions arising from the formation of disoriented chiral condensates. It is shown that the excess Ω or Ω̄ produced c...
متن کاملar X iv : h ep - p h / 07 01 02 9 v 2 5 J an 2 00 7 Chemical Equilibrium in Heavy Ion Collisions : Rapidity Dependence
Particle yields in heavy ion collisions show an overwhelming evidence for chemical or relative chemical equilibrium at all beam energies. The rapidity dependence of the thermal parameters T and µ B can now be determined over a wide range of rapidities and show a systematic behavior towards an increase in µ B away from mid-rapidity.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2001