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相关论文: Centrality dependence of thermal parameters in hea…

200 篇论文

We calculate the centrality dependence of direct photons produced in Au+Au collisions at sqrt{s}=200GeV and their transverse momentum spectra within the Parton-Hadron-String Dynamics (PHSD) transport approach. As sources for 'direct'…

核理论 · 物理学 2014-03-26 O. Linnyk , W. Cassing , E. Bratkovskaya

One of the main goals of heavy-ion collision experiments is to study the structure of the QCD phase diagram. The QCD phase diagram is typically plotted as temperature ($T$) vs. baryon chemical potential ($\mu_{B}$). The statistical thermal…

核实验 · 物理学 2013-08-15 Lokesh Kumar

We present results on spectra of pions, kaons and (anti)protons from a study of heavy ion collisions using the perturbative QCD + saturation model to calculate the production of initial (transverse) energy and baryon number followed by a…

核理论 · 物理学 2009-11-07 K. J. Eskola , H. Niemi , P. V. Ruuskanen , S. S. Rasanen

The rapidity dependence of the chemical freeze-out thermal parameters $T$ and $\mu_B$ are determined at the highest RHIC and SPS energies. These show a systematic behavior towards an increase in $\mu_B$ away from mid-rapidity and a…

高能物理 - 唯象学 · 物理学 2009-04-14 F. Becattini , J. Cleymans , J. Strumpfer

Hadron multiplicity in the central rapidity region of high-energy heavy-ion collisions is investigated within a two-component mini-jet model which consists of soft and semi-hard particle production. The hard contribution from mini-jets is…

核理论 · 物理学 2009-11-07 Shi-yuan Li , Xin-Nian Wang

The generic features of parton energy loss effects on the quenching of single hadron spectra in heavy-ion collisions are discussed, paying attention to the expected differences from RHIC to LHC. The need for precise baseline measurements in…

高能物理 - 唯象学 · 物理学 2015-05-30 Francois Arleo

Due to their penetrating nature, dileptons are a valuable probe for the properties of the hot and/or dense medium created in relativistic heavy-ion collisions. Dilepton invariant-mass spectra provide direct access to the properties of the…

核理论 · 物理学 2010-02-25 H. van Hees , R. Rapp

Transverse mass spectra of pions and protons measured in central collisions of heavy ions at the SPS and at RHIC are compared to a hydrodynamic parameterization. While the chemical temperature needed at RHIC is significantly higher compared…

核理论 · 物理学 2011-09-13 T. Peitzmann

The present article reviews facts and problems concerning charge hadron production in high energy collisions. Main emphasis is laid on the qualitative and quantitative description of general characteristics and properties observed for…

高能物理 - 唯象学 · 物理学 2014-01-03 Ashwini Kumar , P. K. Srivastava , B. K. Singh , C. P. Singh

Thermal dilepton radiation from the hot fireballs created in high-energy heavy-ion collisions provides unique insights into the properties of the produced medium. We first show how the predictions of hadronic many-body theory for a melting…

高能物理 - 唯象学 · 物理学 2016-02-24 Ralf Rapp , Hendrik van Hees

We take the experimental data for transverse momentum spectra of identified charged hadrons in different centrality classes for nucleus-nucleus (A+A) collisions at various Relativistic Heavy-Ion Collider (RHIC) energies measured by the STAR…

高能物理 - 唯象学 · 物理学 2018-08-17 Pragati Sahoo , Sudipan De , Swatantra Kumar Tiwari , Raghunath Sahoo

Starting from the light-cone plasma (LCP) distribution of gluons produced in proton-proton collisions, we derive the invariant charged-particle yield dN/dyd^2pT in heavy-ion collisions. Multiple scattering of partons in the other nucleus…

核理论 · 物理学 2013-05-16 H. J. Pirner , K. Reygers , B. Z. Kopeliovich

Employing thermal dilepton rates based on medium-modified electromagnetic correlation functions we show that recent dimuon spectra of the NA60 collaboration in central In-In collisions at the CERN-SPS can be understood in terms of radiation…

高能物理 - 唯象学 · 物理学 2007-05-23 Hendrik van Hees , Ralf Rapp

A unique parametrization of secondary (thermal) dilepton yields in heavy-ion experiments at CERN-SPS is proposed. This parametrization resembles a thermal $q \bar q$ annihilation rate. This is inspired by the observation that lepton pair…

高能物理 - 唯象学 · 物理学 2009-09-25 K. Gallmeister , B. Kämpfer , O. P. Pavlenko , C. Gale

The parameters obtained from the theoretical analysis of the single photon spectra observed by the WA98 collaboration at SPS energies have been used to evaluate the two photon correlation functions. The single photon spectra and the two…

核理论 · 物理学 2009-11-10 Jan-e Alam , Bedangadas Mohanty , Pradip Roy , Sourav Sarkar , Bikash Sinha

Dilepton production in heavy-ion collisions at collider energies - i.e., for the Relativistic Heavy-Ion Collider (RHIC) and the Large Hadron Collider (LHC) - is studied within an approach that uses coarse-grained transport simulations to…

核理论 · 物理学 2016-08-22 Stephan Endres , Hendrik van Hees , Marcus Bleicher

We collected the experimental data of transverse momentum spectra of identified particles produced in proton-proton ($p$-$p$), deuteron-gold ($d$-Au or $d$-$A$), gold-gold (Au-Au or $A$-$A$), proton-lead ($p$-Pb or $p$-$A$), and lead-lead…

高能物理 - 唯象学 · 物理学 2021-02-19 Pei-Pin Yang , Mai-Ying Duan , Fu-Hu Liu

Multiplicity fluctuations of positively, negatively and all charged hadrons in the forward hemisphere were studied in central Pb+Pb collisions at 20A, 30A, 40A, 80A and 158A GeV. The multiplicity distributions and their scaled variances are…

核实验 · 物理学 2013-05-29 The NA49 Collaboration , B. Lungwitz

The properties of thermal dilepton production from heavy-ion collisions in the RHIC energy regime are evaluated for invariant masses ranging from 0.5 to 3 GeV. Using an expanding thermal fireball to model the evolution through both…

高能物理 - 唯象学 · 物理学 2009-10-31 R. Rapp

The system size and centrality dependence of multiplicity fluctuations in nuclear collisions at $158A$ GeV as well as the energy dependence for the most central $Pb+Pb$ collisions were studied by the NA49 experiment at CERN SPS. A strong…

核实验 · 物理学 2016-08-16 Benjamin Lungwitz