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CERN Document Server 16 のレコードが見つかりました。  1 - 10次  レコードへジャンプ: 検索にかかった時間: 0.50 秒 
1.
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
2.
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
3.
Localized Charged-Neutral Fluctuations in 158 A GeV Pb+Pb Collisions / WA98 Collaboration
First results on the measurement of localized fluctuations in the multiplicity of charged particles and photons produced in central 158 A GeV Pb+Pb collisions are presented. The charged versus neutral correlations in common phase space regions of varying azimuthal size are analyzed by two different methods. [...]
nucl-ex/0012004.- 2001 - 5 p. - Published in : Phys. Rev. C 64 (2001) 011901 Fulltext: PDF; External link: nucl-ex/0012004 PDF
4.
Three-Pion Interferometry Results from Central Pb+Pb Collisions at 158 A GeV/c / WA98 Collaboration
Three-particle correlations have been measured for identified negative pions from central 158 A GeV Pb+Pb collisions by the WA98 experiment at CERN. A substantial contribution of the genuine three-body correlation has been found as expected for a mainly chaotic and symmetric source..
hep-ex/0008018.- Geneva : CERN, 2000 - 8 p. - Published in : Phys. Rev. Lett. 85 (2000) 2895 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-ex/0008018 PDF
5.
Scaling of Particle and Transverse Energy Production in 208Pb+208Pb collisions at 158 A GeV / WA98 Collaboration
Transverse energy, charged particle pseudorapidity distributions and photon transverse momentum spectra have been studied as a function of the number of participants (N_{part}) and the number of binary nucleon-nucleon collisions (N_{coll}) in 158 A GeV Pb+Pb collisions over a wide impact parameter range. A scaling of the transverse energy pseudorapidity density at midrapidity as N_{part}^{1.08 \pm 0.06} and N_{coll}^{0.83 \pm 0.05} is observed. [...]
nucl-ex/0008004.- Upton, NY : Brookhaven Nat. Lab., 2001 - 11 p. - Published in : Eur. Phys. J. C 18 (2001) 651-63 Fulltext: PDF; External link: Fulltext
6.
$\Delta^{++}$ 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
7.
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
8.
Direct Photon Production in 158 A GeV $^{208}Pb+^{208}Pb$ collisions / WA98 Collaboration
A measurement of direct photon production in 208Pb + 208Pb collisions at 158 A GeV has been carried out in the CERN WA98 experiment. The invariant yield or upper limit of direct photons as a function of transverse momentum in the interval 0.5 < p_T < 4 GeV/c is presented. [...]
nucl-ex/0006007.- 2001 - 56 p. Fulltext: PDF; External link: Fulltext
9.
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
10.
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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