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We analyzed the transverse momentum spectra of positively and negatively charged pions ($\pi^+$ and $\pi^-$), positively and negatively charged kaons ($K^+$ and $K^-$), protons and antiprotons ($p$ and $\bar p$), as well as $\phi$ produced…

High Energy Physics - Phenomenology · Physics 2022-01-07 Li-Li Li , Fu-Hu Liu , Muhammad Waqas , Muhammad Ajaz

We study the effect of finite chemical potential for the QGP constituents in the Ramanathan et al. statistical model (Phys.Rev.C70, 027903,2004). While the earlier computations using this model with vanishing chemical potentials indicated a…

High Energy Physics - Phenomenology · Physics 2011-07-26 R. Ramanathan , Agam k. Jha , K. k. Gupta , S. S. Singh

The reaction $\gamma p \to \pi^+K^-K^+n$ was studied at Jefferson Lab using a tagged photon beam with an energy range of 3-5.47 GeV. A narrow baryon state with strangeness S=+1 and mass $M=1555\pm 10$ MeV/c$^2$ was observed in the $nK^+$…

High Energy Physics - Experiment · Physics 2019-08-14 V. Kubarovsky

We demonstrate that both quark-gluon plasma (QGP) and hadronic gas (HG) models of the central fireball created in S -> W collisions at 200 GeV A are possible sources of the recently observed strange (anti-) baryons. From the theoretical…

High Energy Physics - Phenomenology · Physics 2010-11-01 Jean Letessier , Johann Rafelski , Ahmed Tounsi

The BRAHMS collaboration has measured inclusive proton and anti-proton spectra at several rapidities (0 < y < 3) for Au+Au collisions at sqrt(s_NN) = 200 GeV. Rapidity densities of protons, anti-protons, and net-protons [N(p)-N(p-bar)] are…

Nuclear Experiment · Physics 2019-08-14 Peter Christiansen

We construct net baryon number and strangeness susceptibilities as well as correlations between electric charge and strangeness from experimental data of the ALICE Collaboration at the CERN LHC. The data were taken in Pb-Pb collisions at…

High Energy Physics - Phenomenology · Physics 2015-06-02 Peter Braun-Munzinger , Alexander Kalweit , Krzysztof Redlich , Johanna Stachel

Recent data on hadron multiplicities in central Pb+Pb collisions at 158A GeV/c at mid-rapidity are analyzed within the concept of chemical freeze-out. A non-uniformity of the baryon chemical potential along the beam axis is taken into…

Nuclear Theory · Physics 2010-04-05 S. V. Akkelin , P. Braun-Munzinger , Yu. M. Sinyukov

We study the mass dependent hierarchy of kinetic freeze-out parameters of hadrons in low energy heavy-ion collisions. For this purpose, the transverse momentum and rapidity spectra of the identified hadrons produced in central Pb+Pb…

High Energy Physics - Phenomenology · Physics 2020-11-25 Sudhir Pandurang Rode , Partha Pratim Bhaduri , Amaresh Jaiswal , Ankhi Roy

Net-baryon rapidity distributions in central Au+Au collisions at 200 GeV per nucleon are shown to consist of three components. The nonequilibrium contributions are accounted for in a Relativistic Diffusion Model. Near midrapidity, a third…

High Energy Physics - Phenomenology · Physics 2009-11-10 Georg Wolschin

This article explores the van der Waals gas model proposed to describe the hadronic stages of nuclear fireball evolution during the cooling stage. Two different models were proposed for the early and late stages of hadronization. At the…

High Energy Physics - Phenomenology · Physics 2023-05-18 Yaroslav D. Krivenko-Emetov , Andriy I. Smetana

Statistical fluctuations in the transverse distribution of sources in relativistic heavy ion collisions and an asymmetric emission profile associated with the wounded nucleons lead to rapidity dependence of the reaction plane. The size of…

Nuclear Theory · Physics 2012-04-24 Joao Moreira , Piotr Bozek , Wojciech Broniowski

Yields and spectra of strange hadrons (K+, K-, phi, Lambda and Antilambda) as well as of charged pions were measured in near central C+C and Si+Si collisions at 158 AGeV beam energy with the NA49 detector. Together with earlier data for…

Nuclear Experiment · Physics 2009-11-10 Ingrid Kraus

We analyzed the transverse momentum {\ppt} spectra of different particle species containing strange quark {\ks}, {\lam (\alam)} and {\xim ({\axi})} in different centrality intervals at mid-rapidity ($y$) from {\auau} collisions at…

High Energy Physics - Phenomenology · Physics 2022-09-07 M. U. Ashraf , Junaid Tariq , Sumaira Ikram , A. M. Khan

A study of energy behavior of the pion spectra and interferometry scales is carried out for the top SPS, RHIC and LHC energies within the hydrokinetic approach. The latter allows one to describe evolution of quark-gluon and hadron matter as…

Nuclear Theory · Physics 2015-03-13 Iu. A. Karpenko , Yu. M. Sinyukov

The transverse momentum spectra of hyperons from LHC experiments (ALICE, ATLAS, CMS) are considered from the point of view of Quark-Gluon String Model (QGSM) as examples of typical baryon spectra at very high energies. The LHC data at…

High Energy Physics - Phenomenology · Physics 2013-01-29 O. Piskounova

Driven by the Beam Energy Scan (BES) program at the RHIC, researches and discussions on the QCD phase diagram have flourished recently. In order to provide a reference from microscopic transport models, we performed a systematic analysis,…

High Energy Physics - Phenomenology · Physics 2014-09-04 N. Yu , F. Liu , K. Wu

We determine rapidity asymmetry in the production of charged pions, protons and anti-protons for large transverse momentum (pT) for d+Au collisions at \sqrt s_NN = 200 GeV. The identified hadrons are measured in the rapidity regions |y| <…

Nuclear Experiment · Physics 2012-08-27 STAR Collaboration

Identified charged kaon, pion, and proton spectra and ratios from sqrt(s_NN) = 200 and 62.4 GeV Cu+Cu collisions are studied with a hydro-motivated blast-wave and a statistical model framework in order to explore the strangeness production…

Nuclear Experiment · Physics 2008-11-26 Aneta Iordanova

Chemical non-equilibrium version of the statistical hadronization model combined with a single-freeze-out scenario is used to analyze the transverse-momentum spectra of pions, kaons and protons produced in heavy-ion collisions at sqrt(sNN)…

Nuclear Theory · Physics 2014-07-22 Viktor Begun , Wojciech Florkowski , Maciej Rybczynski

The recently discovered sharp peak in the excitation function of the K+/pi+ ratio around 30 A GeV in relativistic heavy-ion collisions is discussed in the framework of the Statistical Model. In this model, the freeze-out of an ideal hadron…

Nuclear Theory · Physics 2008-11-26 H. Oeschler , J. Cleymans , K. Redlich , S. Wheaton