scholarly journals Centrality Dependence of Charged-Hadron Transverse-Momentum Spectra ind+AuCollisions atsNN=200  GeV

2003 ◽  
Vol 91 (7) ◽  
Author(s):  
B. B. Back ◽  
M. D. Baker ◽  
M. Ballintijn ◽  
D. S. Barton ◽  
B. Becker ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Charged Hadron ◽  
Centrality Dependence ◽  
Momentum Spectra ◽  
200 Gev ◽  
Transverse Momentum Spectra

pT spectra of charged hadrons in proton–proton collisions at s = 200 GeV

2019 ◽  
Vol 34 (19) ◽  
pp. 1950148 ◽  
Author(s):  
M. Ajaz ◽  
Maryam
Keyword(s):  
Transverse Momentum ◽  
Star Collaboration ◽  
Hadron Production ◽  
Proton Proton ◽  
Proton Collisions ◽  
Production Models ◽  
Momentum Spectra ◽  
200 Gev ◽  
Transverse Momentum Spectra ◽  
Proton Proton Collisions

The transverse momentum spectra of [Formula: see text] mesons, protons and antiprotons produced in proton–proton collisions at 200 GeV with hadron production models are reported. Two tunes of EPOS (EPOS1.99 and EPOS-LHC), three tunes of QGSJET (QGSJETI, QGSJETII-03, QGSJETII-04), DPMJET and HIJING models are used to obtain the spectra. The results are compared with the measurements of STAR collaboration obtained at mid-rapidity of [Formula: see text] in [Formula: see text] range of [Formula: see text]. All models reproduce the ratios [Formula: see text] and [Formula: see text] at low [Formula: see text] but could not predict well at high [Formula: see text]. In addition, EPOS tunes and QGSJET tunes predict well the spectra of [Formula: see text] meson and the ratios [Formula: see text] and [Formula: see text] at low [Formula: see text]. The HIJING and the QGSJET (tune I only) could reproduce all the spectra and all the ratios at a satisfactory level of precision and were found good among the models considered in the current study at RHIC energy.

scholarly journals Pseudorapidity dependence of charged hadron transverse momentum spectra ind+Aucollisions atsNN=200GeV

2004 ◽  
Vol 70 (6) ◽  
Author(s):  
B. B. Back ◽  
M. D. Baker ◽  
M. Ballintijn ◽  
D. S. Barton ◽  
B. Becker ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Charged Hadron ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra

scholarly journals Coulomb Interaction Effects on Pion Production in Au+Au Collisions at Relativistic Energies

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Catalin Ristea ◽  
Oana Ristea ◽  
Alexandru Jipa
Keyword(s):  
Transverse Momentum ◽  
Coulomb Interaction ◽  
Beam Energy ◽  
Pion Production ◽  
Charged Pion ◽  
Centrality Dependence ◽  
Central Collisions ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra ◽  
Coulomb Effects

Coulomb effects on charged pion transverse momentum spectra measured in Au+Au collisions at RHIC-BES energies are investigated. From these spectra the π-/π+ ratios as a function of transverse momentum are obtained and used to extract the “Coulomb kick”, pc (a momentum change due to the Coulomb interaction), and initial pion ratio for three different collision energies and various centrality classes. The Coulomb kick shows a decrease with the increase of beam energy and a clear centrality dependence, with larger values for the most central collisions. The results are connected with the kinetic freeze-out dynamics.

scholarly journals Energy dependence of π±, p and p¯ transverse momentum spectra for Au+Au collisions at sNN=62.4 and 200 GeV

2007 ◽  
Vol 655 (3-4) ◽  
pp. 104-113 ◽  
Author(s):  
B.I. Abelev ◽  
M.M. Aggarwal ◽  
Z. Ahammed ◽  
B.D. Anderson ◽  
D. Arkhipkin ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Energy Dependence ◽  
Momentum Spectra ◽  
200 Gev ◽  
Transverse Momentum Spectra

scholarly journals Chemical Potentials of Light Flavor Quarks from Yield Ratios of Negative to Positive Particles in Au+Au Collisions at RHIC

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Ya-Qin Gao ◽  
Hai-Ling Lao ◽  
Fu-Hu Liu
Keyword(s):  
Transverse Momentum ◽  
Collision Energy ◽  
Center Of Mass ◽  
Star Collaboration ◽  
Strange Quarks ◽  
Center Of Mass Energy ◽  
Chemical Potentials ◽  
Momentum Spectra ◽  
200 Gev ◽  
Transverse Momentum Spectra

The transverse momentum spectra of π-, π+, K-, K+, p¯, and p produced in Au+Au collisions at center-of-mass energy sNN=7.7, 11.5, 19.6, 27, 39, 62.4, 130, and 200 GeV are analyzed in the framework of a multisource thermal model. The experimental data measured at midrapidity by the STAR Collaboration are fitted by the (two-component) standard distribution. The effective temperature of emission source increases obviously with the increase of the particle mass and the collision energy. At different collision energies, the chemical potentials of up, down, and strange quarks are obtained from the antiparticle to particle yield ratios in given transverse momentum ranges available in experiments. With the increase of logarithmic collision energy, the chemical potentials of light flavor quarks decrease exponentially.

scholarly journals THE CENTRALITY DEPENDENCE OF STRANGE BARYON AND MESON PRODUCTION IN CU+CU AND AU+AU FOR $\sqrt{^SNN} = 200 {\rm GEV}$ COLLISIONS

2007 ◽  
Vol 16 (07n08) ◽  
pp. 2055-2060 ◽  
Author(s):  
◽  
ANTHONY R. TIMMINS
Keyword(s):  
Transverse Momentum ◽  
Meson Production ◽  
Strangeness Production ◽  
Centrality Dependence ◽  
Strange Baryon ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra

Transverse momentum spectra of Λ and [Formula: see text] particles are presented for Cu + Cu at [Formula: see text] collisions observed at STAR, and compared to Au + Au measurements at the same energy. For both systems, a number of observables are shown to increase at mid-rapidity (|y| < 0.5) with increasing centrality. These are the integrated Λ and [Formula: see text] yields, the integrated ? and [Formula: see text] yields per participating nucleon, and mid-pT(1 GeV /c → 4.5 GeV /c)[Formula: see text] ratios. The RCP ratio is found to be higher for the Λ yields at mid-pT compared to the [Formula: see text] yields for both the Cu + Cu and Au + Au data. In contrast, when similar numbers of participating nucleons are considered for the Cu + Cu and Au + Au data, an indication of increased bulk strangeness production and a higher mid-pT(1 GeV /c → 4.5 GeV /c)[Formula: see text] ratio are found, for Cu + Cu .

Spectres des particules négatives et des photons dans les collisions p–W, 16O–W et 32S–W à 200 GeV/nucléon

1989 ◽  
Vol 67 (12) ◽  
pp. 1219-1221
Author(s):  
Jean-Marc Beaulieu
Keyword(s):  
Transverse Momentum ◽  
Significant Variation ◽  
Transverse Energy ◽  
Momentum Spectra ◽  
200 Gev ◽  
Transverse Momentum Spectra ◽  
Several Intervals

Transverse momentum spectra of negative particles and photons have been measured in p + W, 16O + W, and 32S + W collisions, at a laboratory energy of 200 GeV/nucleon. Spectra obtained with the various beams and for several intervals of transverse energy were compared. No significant variation was detected.

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