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相关论文: Source Temperatures and Sizes in Central Collision…

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We present the combined results on electron-pair production in 158 GeV/n {Pb-Au} ($\sqrt{s}$= 17.2 GeV) collisions taken at the CERN SPS in 1995 and 1996, and give a detailed account of the data analysis. The enhancement over the reference…

The transverse momentum distribution of the direct photons measured by the PHENIX collaboration in $Au + Au$ collisions at $\sqrt{s}=200$ GeV/A has been analyzed. It has been shown that the data can be reproduced reasonably well assuming a…

核理论 · 物理学 2008-11-26 Jan-e Alam , Jajati K. Nayak , Pradip Roy , Abhee K. Dutt-Mazumder , Bikash Sinha

Spectra of various particle species have been calculated with the Quantum Molecular Dynamics (QMD) model for very central collisions of Au+Au. They are compatible with the idea of a fully stopped thermal source which exhibits a transversal…

核理论 · 物理学 2009-10-28 Jens Konopka , Horst Stoecker , Walter Greiner

A simple power-law growth of charged-particle multiplicities near midrapidity in central Au+Au collisions at $\sqrt{s_{NN}}=56$ and 130 GeV, recently measured at RHIC, is derived. We give predictions for the central particle densities up to…

高能物理 - 唯象学 · 物理学 2011-03-23 Saul Barshay , Georg Kreyerhoff

Elliptic flow from nuclear collisions is a hadronic observable sensitive to the early stages of system evolution. We report first results on elliptic flow of charged particles at midrapidity in Au+Au collisions at sqrt(s_NN)=130 GeV using…

核实验 · 物理学 2008-11-26 STAR Collaboration , K. H. Ackermann

We present the scaling properties of mass number of light (anti)nuclei production in midrapidity Au + Au collisions at $\sqrt {s_{NN}}=200$ GeV based on the PACIAE + DCPC model. It is found that the integrated yield of light (anti)nuclei…

高能物理 - 唯象学 · 物理学 2020-08-30 Gang Chen , Huan Chen , Jiang-Ling Wang , Zheng-Yu Chen

This article focuses on the study of strange hadrons at 0.2 TeV centre of mass energy, recorded by STAR at RHIC, and at 0.9 TeV, 5.02 TeV and 7 TeV, recorded by CMS at LHC, in pp collision in the rapidity range from 0 to 2. The transverse…

高能物理 - 唯象学 · 物理学 2024-11-14 Murad Badshah , Muhammad Ajaz , Muhammad Waqas , Hannan Younis

Medium effects on charged-particle production are studied using three analysis techniques. We find angular collinearity and number correlations on $p_t$ at moderate $p_t<3$ GeV/$c$. In this $p_t$ range abundant multiplicities enable…

核实验 · 物理学 2007-05-23 Mikhail Kopytine

The two-proton correlation function at midrapidity from Pb+Pb central collisions at 158 AGeV has been measured by the NA49 experiment. The results are compared to model predictions from static thermal Gaussian proton source distributions…

核实验 · 物理学 2008-11-26 H. Appelshauser , NA49 Collaboration

Isospin and density waves in neutral neutron-proton-electron (npe) matter are studied within a relativistic mean-field hadron model at finite temperature with the inclusion of the electromagnetic field. The dispersion relation is calculated…

核理论 · 物理学 2007-05-23 L. Brito , C. Providencia , A. M. Santos , S. S. Avancini , D. P. Menezes , Ph. Chomaz

The BRAHMS collaboration has measured transverse momentum spectra of pions, kaons, protons and antiprotons at rapidities 0 and 3 for Cu+Cu collisions at $\sqrt{s_{NN}} = 200$ GeV. As the collisions become more central the collective radial…

The preliminary CERN SPS NA49 Pb+Pb 158 GeV/A negative one- and two-particle spectra at mid-rapidity are consistent with a source of temperature 130 MeV, lifetime 9 fm/c, transverse flow 0.35, and a transverse geometric size which is twice…

核理论 · 物理学 2009-10-09 Urs Achim Wiedemann , Boris Tomasik , Ulrich Heinz

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…

核实验 · 物理学 2007-05-23 F. Wang

We will report centrality dependence of chemical freeze-out temperature ($T_{ch}$), light quark chemical potential ($\mu_{q}$), strange quark chemical potential ($\mu_{s}$), and strangeness saturation factor ($\gamma_{s}$) in Au+Au…

核理论 · 物理学 2007-05-23 Masashi Kaneta , Nu Xu

The centrality dependence of the midrapidity charged particle multiplicity in Au+Au collisions at sqrt(s_NN) = 19.6 and 200 GeV is presented. Within a simple model, the fraction of hard (scaling with number of binary collisions) to soft…

核实验 · 物理学 2019-08-14 B. B. Back

Using equilibrium hydrodynamics with initial conditions for the energy and net baryon number densities from the perturbative QCD + saturation model, a good simultaneous description of the measured pion, kaon and (anti)proton spectra in…

高能物理 - 唯象学 · 物理学 2009-11-07 K. J. Eskola , H. Niemi , P. V. Ruuskanen , S. S. Räsänen

We study the transverse momentum spectra of light nuclei (deuteron, anti-deuteron and triton) produced in Gold-Gold (Au-Au) collisions in different centrality bins by the blast wave model with Tsallis statistics. The model results are in…

核理论 · 物理学 2021-10-19 M. Waqas , G. X. Peng , Rui-Qin Wang , Muhammad Ajaz , Abd Al Karim Haj Ismail

The squared momentum transfer spectra of light mesons, $\pi^0$, $\pi^+$, $\eta$, and $\rho^0$, produced in high-energy virtual photon-proton ($\gamma^{*} p$) $\rightarrow {\rm meson + nucleon}$ process in electron-proton ($ep$) collisions…

高能物理 - 唯象学 · 物理学 2021-12-08 Qi Wang , Fu-Hu Liu , Khusniddin K. Olimov

A discussion of results for short and long-range multiplicity correlations (forward-backward) are presented for several systems (Au+Au, Cu+Cu, and pp) and energies (e.g. $\sqrt{s_{NN}}$ = 200, 62.4, and $\approx$ 20 GeV). These correlations…

核实验 · 物理学 2010-01-05 Terence J. Tarnowsky

In this work, we have extracted the initial tempearture from the transverse momentum spectra of charged particles in $Au+Au$ collisions using STAR data at RHIC energies from $\sqrt{s_{NN}}$ = 7.7 to 200 GeV. The initial energy density…