Ja n 20 00 CAN EXTENDED DUALITY UNIQUELY EXPLAIN THE DILEPTON DATA IN HIC ’ S AT SPS ?

نویسندگان

  • B. KÄMPFER
  • K. GALLMEISTER
چکیده

Extended duality is used to explain the dilepton data of heavy-ion experiments at CERN-SPS. Taking into account the background contributions (hadronic cocktail, Drell-Yan, semileptonic decays of open charm) the spectral shapes of the CERES, NA38/50 and HELIOS-3 data in experiments with lead and sulfur beams can be well described, however, the normalizations of the sulfur beam data are problematic.

برای دانلود رایگان 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 / 9 61 10 37 v 1 1 8 N ov 1 99 6 Dilepton production in proton - nucleus and nucleus - nucleus collisions at SPS energies

Dilepton production in proton-and nucleus-induced reactions is studied in relativistic transport model using initial conditions determined by the string dynamics from RQMD. It is found that both the CERES and HELIOS-3 data for dilepton spectra in proton-nucleus reactions can be well described by the 'conventional' mechanism of Dalitz decay and direct vector meson decay. However, to provide a qu...

متن کامل

Electromagnetic Probes of Dense Matter in Relativistic Heavy-ion Collisions

Dilepton and photon production in heavy-ion collisions at SPS energies is studied in the relativistic transport model that incorporates self-consistently the change of hadron masses in dense matter. It is found that the dilepton spectra in protonnucleus reactions can be well described by the conventional mechanisms of Dalitz decay, primary vector meson decay, decay of charmed mesons, and the in...

متن کامل

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

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.

متن کامل

0 N ov 1 99 6 Dilepton Production from AGS to SPS Energies within a Relativistic Transport Approach ∗

We present a nonperturbative dynamical study of e + e − production in proton-nucleus and nucleus-nucleus collisions from AGS to SPS energies on the basis of the covariant transport approach HSD. For p + Be reactions the dilepton yield for invariant masses M ≤ 1.4 GeV is found to be dominated by the decays of the η, ρ, ω and Φ mesons at all energies from 10 – 450 GeV. For nucleus-nucleus collisi...

متن کامل

l - th / 9 70 80 20 v 2 3 N ov 1 99 7 Probing the ρ spectral function in hot and dense nuclear matter by dileptons ∗

We present a dynamical study of e + e − and µ + µ − production in proton-nucleus and nucleus-nucleus collisions at CERN-SPS energies on the basis of the covariant transport approach HSD employing a momentum-dependent ρ-meson spectral function that includes the pion modifications in the nuclear medium as well as the polarization of the ρ-meson due to resonant ρ−N scattering. We find that the exp...

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

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2000