| 1. |
- Adler, SS, et al.
(författare)
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Double helicity asymmetry in inclusive midrapidity pi(0) production for polarized p+p collisions at root s=200 GeV
- 2004
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Ingår i: Physical Review Letters. - 1079-7114. ; 93:20: 202002
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Tidskriftsartikel (refereegranskat)abstract
- We present a measurement of the double longitudinal spin asymmetry in inclusive pi(0) production in polarized proton-proton collisions at roots=200 GeV. The data were taken at the Relativistic Heavy Ion Collider with average beam polarizations of 0.27. The measurements are the first in a program to study the longitudinal spin structure of the proton, using strongly interacting probes, at collider energies. The asymmetry is presented for transverse momenta 1-5 GeV/c at midrapidity, where next-to-leading-order perturbative quantum chromodynamic (NLO pQCD) calculations well describe the unpolarized cross section. The observed asymmetry is small and is compared to a NLO pQCD calculation with a range of polarized gluon distributions.
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| 2. |
- Csanad, M, et al.
(författare)
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A hint at quark deconfinement in 200 GeVAu+Au data at RHIC
- 2004
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Ingår i: Nukleonika. - 0029-5922. ; 49, s. 49-55
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Tidskriftsartikel (refereegranskat)abstract
- We give the emission function of the axially symmetric Buda-Lund hydro, model and present its simultaneous, high quality fits to identified particle spectra, two-particle Bose-Einstein or HBT correlations and charged particle pseudorapidity distributions as measured by BRAHMS and PHENIX in 0-30% central, roots(NN) = 200 GeV Au+Au collisions at RHIC. The best fit is achieved when the most central region of the particle emitting volume is superheated to T-0 = 200 +/- 9 MeV greater than or equal to T-c = 172 +/- 3 MeV, a 3 sigma effect.
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| 3. |
- Csanad, M, et al.
(författare)
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An indication for deconfinement in Au plus Au collisions at RHIC
- 2004
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Ingår i: Acta Physica Polonica. Series B: Elementary Particle Physics, Nuclear Physics, Statistical Physics, Theory of Relativity, Field Theory. - 0587-4254. ; 35:1, s. 191-196
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Tidskriftsartikel (refereegranskat)abstract
- We present simultaneous, quality fits to final BRAHMS, PHOBOS, STAR and PHENIX data on particle spectra and two-particle Bose-Einstein or HBT correlations as measured in Au+Au collisions at root(S)NN = 130 GeV. Using the Buda-Lund hydro model, the best fit is achieved when the most central 1/8th of the particle emitting volume is superheated to T > T-c = 170 MeV. In contrast, we find no indication for such a hot central region in a similar analysis of Pb+Pb data at CERN SPS.
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| 4. |
- Csanad, M, et al.
(författare)
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Buda-Lund hydro model and the elliptic flow at RHIC
- 2004
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Ingår i: Nukleonika. - 0029-5922. ; 49:Supplement 2, s. 45-48
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Tidskriftsartikel (refereegranskat)abstract
- The ellipsoidally symmetric Buda-Lund hydrodynamic model describes naturally the transverse momentum and the pseudorapidity dependence of the elliptic flow in Au+Au collisions at roots(NN) = 130 and 200 GeV. The result confirms the indication of quark deconfinement in Au+Au collisions at RHIC, obtained from Buda-Lund hydro model fits to combined spectra and HBT radii of BRAHMS, PHOBOS, PHENIX and STAR.
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| 5. |
- Csanad, M, et al.
(författare)
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Buda-Lund hydro model for ellipsoidally symmetric fireballs and the elliptic flow at RHIC
- 2004
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Ingår i: Nuclear Physics, Section A. - : Elsevier BV. - 0375-9474. ; 742:1-2, s. 80-94
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Tidskriftsartikel (refereegranskat)abstract
- The ellipsoidally symmetric extension of Buda-Lund hydrodynamic model is shown here to yield a natural description of the pseudorapidity dependence of the elliptic flow upsilon(2)(eta)), as determined recently by the PHOBOS experiment for Au + Au collisions at root(S)NN = 130 and 200 GeV. With the same set of parameters, the Buda-Lund model describes also the transverse momentum dependence of upsilon(2) of identified particles at mid-rapidity. The results confirm the indication for quark deconfinement in Au+Au collisions at RHIC, obtained from a successful Buda-Lund hydro model fit to the single particle spectra and two-particle correlation data, as measured by the BRAHMS, PHOBOS, PHENIX and STAR Collaborations. (C) 2004 Elsevier B.V. All rights reserved.
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| 6. |
- Csanad, M, et al.
(författare)
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Indication of quark deconfinement and evidence for a Hubble flow in 130 and 200 GeV Au+Au collisions
- 2004
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Ingår i: Journal of Physics G: Nuclear and Particle Physics. - : IOP Publishing. - 0954-3899 .- 1361-6471. ; 30:8, s. 1079-1082
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Tidskriftsartikel (refereegranskat)abstract
- Buda-Lund hydro-model fits are compared to BRAHMS, PHENIX, PHOBOS and STAR data on identified particle spectra, two-particle Bose-Einstein or HBT correlations, charged particle pseudorapidity distributions and pseudorapidity as well as PT dependent elliptic flow in rootS(NN) = 130 and 200 GeV Au+Au collisions at RHIC. Preliminary results indicate that 7/8 of the particle emitting volume is rather cold, with surface temperature of 105 MeV, but the temperature has a distribution and the most central 1/8 of the volume is superheated to temperatures above the critical value, T(x) > T-c = 172 3 MeV.
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