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CERN Document Server 2,042 záznamov nájdených  1 - 10ďalšíkoniec  skoč na záznam: Hľadanie trvalo 0.62 sekúnd. 
1.
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One-, two- and three-particle distributions from central Pb+Pb collisions at 158A GeV/c / WA98 Collaboration
The WA98 experiment at the CERN SPS combines large acceptance photon detectors with a two-arm charged particle tracking spectrometer to study 158A GeV Pb+Pb collisions.We present results from one-, two- and three-particle analyses for charged particles identified with a time of flight system. The rapidity acceptance for pions in the first (second) arm ranged from y=2.1 (2.6) to 3.1 (3.8) with an average at 2.7 (3.2), close to mid-rapidity which was 2.9. [...]
Geneva : CERN, 2002 - Published in : Nucl. Phys. A 698 (2002) 647C-50C
In : 15th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, Stony Brook, NY, USA, 15 - 20 Jan 2001, pp.647C-50C
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2.
(91)
Collective flow and HBT in Pb+Pb collisions at the CERN-SPS / WA98 Collaboration
Study of elliptic emission for identified particles has been performed in 158A GeV Pb+Pb collisions near mid-rapidity region. Our preliminary results indicate the existence of the in-plane elliptic emission for pi /sup +/ and proton, and out-of-plane elliptic emission for K/sup +/ in semi-central collisions. [...]
Geneva : CERN, 2000 - Published in : Nucl. Phys. A 663-664 (2000) 729-32
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3.
(90)
Direct photons in WA98 / WA98 Collaboration
A measurement of direct photon production in /sup 208/Pb+/sup 208/Pb collisions at 158 A GeV has been carried out in the CERN WA98 experiment. The invariant yield of direct photons was extracted as a function of transverse momentum in the interval 0.5<P/sub T/<3.3 GeV /c for, peripheral, and 0.5<P/sub T/<4.0 GeV/c for central collisions. [...]
Geneva : CERN, 2002 - Published in : Nucl. Phys. A 698 (2002) 135C-42C
In : 15th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, Stony Brook, NY, USA, 15 - 20 Jan 2001, pp.135C-42C
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4.
(83)
Elliptic emission of $K^{+}$ and $\pi^{+}$ in 158A GeV Pb + Pb collisions / WA98 Collaboration
An event-by-event analysis of the azimuthal angular correlation with respect to the reaction plane has been carried out for K/sup +/ and pi /sup +/ emission near mid-rapidity in 158A.GeV Pb+Pb collisions. In semi-central collisions, K/sup +/ mesons are found to be preferentially emitted out of the reaction plane, while pi /sup +/ mesons are emitted in the reaction plane. [...]
Geneva : CERN, 1999 - Published in : Nucl. Phys. A 661 (1999) 464-7
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5.
(62)
$\Delta^{++}$ production in 158 A GeV $^{208}Pb+^{208}Pb$ interactions at the CERN SPS / Aggarwal, M M ; Agnihotri, A ; Ahammed, Z ; Angelis, Aris L S ; Antonenko, V G ; Arefev, V ; Astakhov, V A ; Avdeichikov, V ; Awes, T C ; Baba, P V K S et al.
The Delta /sup ++/-resonance production in central 158 A GeV /sup 208 /Pb+/sup 208/Pb collisions at the CERN SPS has been studied. The Delta /sup ++/ production was estimated from the invariant mass spectrum of p pi /sup +/-pairs by subtracting a mixed event background. [...]
Geneva : CERN, 2000 - Published in : Phys. Lett. B 477 (2000) 37-44
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6.
(61)
Collective flow in Pb + Pb collisions at the CERN-SPS / WA98 Collaboration
CNS-REP-21.- Tokyo : Tokyo Univ. Cent. Nucl. Stud., 1999 Access to fulltext document: TIF PDF;
In : 15th Winter Workshop on Nuclear Dynamics, Park City, UT, USA, 9 -16 Jan 1999, pp.205-214
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7.
(53)
Two-particle correlations in 158 A GeV collisions / WA98 Collaboration
The only known way to obtain indirect experimental information on the space-time structure of the particle emitting source created in relativistic heavy-ion collisions is two-particle (Hanbury-Brown- Twiss (HBT)) correlations. In particular a strong correlation between the momenta of the particles and the space-time emission point indicate expanding sources as predicted by hydrodynamical models. [...]
Geneva : CERN, 1999 - Published in : Nucl. Phys. A 661 (1999) 427-30
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8.
(37)
Recent results from the WA98 experiment / WA98 Collaboration
Recent results of the WA98 experiment with Pb induced reactions at 158.A GeV are presented. The scaling properties of the transverse energy and the charged particle multiplicity at midrapidity with the number of participants is studied. [...]
Geneva : CERN, 1999 - Published in : Nucl. Phys. A 661 (1999) 191-7
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9.
(36)
Photon flow in 158 A GeV Pb+Pb collisions / WA98 Collaboration
Directed and elliptic flow of pi /sup 0/ decay photons in 158 A GeV Pb+Pb collisions has been studied near midrapidity in an analysis of data obtained with the photon spectrometer LEDA of the WA98 experiment at the CERN SPS. Preliminary results on the rapidity and transverse momentum dependence of the flow have been obtained for various centrality classes for p/sub T/ > 0.2 GeV/c and 2.3 < y < 2.9. [...]
2003 - Published in : Nucl. Phys. A 715 (2003) 579c-82c
In : 16th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, Nantes, France, 18 - 24 Jul 2002, pp.579c-82c
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10.
(34)
One-, Two- and Three-Particle Distributions from 158 A GeV/c Central Pb+Pb Collisions / WA98 Collaboration
Several hadronic observables have been studied in central 158 A GeV Pb+Pb collisions using data measured by the WA98 experiment at CERN: single negative pion and kaon production, as well as two- and three-pion interferometry. The Wiedemann-Heinz hydrodynamical model has been fitted to the pion spectrum, giving an estimate of the temperature and transverse flow velocity. [...]
nucl-ex/0210002.- Geneva : CERN, 2003 - 24 p. - Published in : Phys. Rev. C 67 (2003) 014906 Fulltext: PDF; External link: Fulltext
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