Two-proton Correlations from Pb+pb Central Collisions
نویسنده
چکیده
The two-proton correlation function at midrapidity from Pb+Pb central collisions at 158 AGeV has been measured by the NA49 experiment. The preliminary results are compared to model predictions from proton source distributions of static thermal Gaussian sources and the transport models of rqmd and venus. We obtain an effective proton source size σeff = 4.0 ± 0.15(stat.) +0.06 −0.18 (syst.) fm. The rqmd model underpredicts the correlation function (σeff = 4.41 fm), while the venus model overpredicts the correlation function (σeff = 3.55 fm).
منابع مشابه
Source radii at target rapidity from two - proton and two - deuteron correlations in central Pb + Pb collisions at 158 A GeV WA 98
Two-proton and two-deuteron correlations have been studied in the target fragmentation region of central Pb+Pb collisions at 158 A GeV. Protons and deuterons were measured with the Plastic Ball spectrometer of the WA98 experiment at the CERN SPS. The results of one-dimensional and multi-dimensional analyses using both the Bertsch-Pratt and Yano-Koonin-Podgoretsky parameterizations of the two-pa...
متن کاملEnergy Dependance of Azimuthal Correlations (and more) in Nucleus–Nucleus Collisions at the CERN SPS
Analysing two-particle azimuthal and pseudorapidity–azimuth correlations of high-pT hadrons, experiments at the RHIC have obtained results — “the double hump”, “the ridge” etc. — which provide interesting information about properties of the hot, dense medium produced in central high-energy heavy-ion collisions as well as of its interaction with products of hard scattering. However, not all of t...
متن کاملTransverse Pressure and Strangeness Dynamics in Relativistic Heavy Ion Reactions
Transverse hadron spectra from proton-proton, proton-nucleus and nucleus-nucleus collisions from 2 AGeV to 21.3 ATeV are investigated within two independent transport approaches (HSD and UrQMD). For central Au+Au (Pb+Pb) collisions at energies above Elab ∼ 5 AGeV, the measured K transverse mass spectra have a larger inverse slope parameter than expected from the default calculations. The additi...
متن کاملProduction and Angular Correlations in 158 A GeV p + A and
Recent results of the WA98 experiment with p and Pb induced reactions at 158 AGeV are presented. Azimuthal γ-γ correlations at high p T were studied in search for a signal of jet-like structures. A clear indication for back-to-back correlations can be seen in p+A with a strong dependence on the p T of the photons and the size of the system. In Pb+Pb collisions in plane elliptic flow has been ob...
متن کاملThe LUCIAE model predictions on the light vector meson production in proton-proton, proton-nucleus and nucleus-nucleus collisions at 158 A GeV
The LUCIAE model predictions are compared with experimental data on light vector meson (ρ, ω, φ) production in pp, p+Pb and Pb+Pb collisions at 158 A GeV. The model reproduces the general trends of the data, but fails in describing the yield of high-pT vector mesons in the central Pb+Pb collisions. Predictions for In+In and p+A (A varying from Be to U) collisions at 158 A GeV are also presented.
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 1999