CERN Accelerating science

CERN Document Server 45 záznamov nájdených  1 - 10ďalšíkoniec  skoč na záznam: Hľadanie trvalo 0.63 sekúnd. 
1.
The Zero Degree Calorimeters for the ALICE Experiment / ALICE Collaboration
The Zero Degree Calorimeters (ZDC) for the ALICE experiment will measure the energy of the spectator nucleons in heavy ion collisions at the CERN LHC, providing a direct measure of the centrality of the collisions. ZDC are spaghetti calorimeters, w hich detect the Cherenkov light produced by the shower particles in silica optical fibers embedded in a dense absorber. [...]
2007 - Published in : Nucl. Instrum. Methods Phys. Res., A 581 (2007) 397-401
In : 11th Vienna Conference on Instrumentation, Vienna, Austria, 19 - 24 Feb 2007, pp.397-401
2.
Charmonia suppression in nucleus-nucleus interactions at CERN SPS / Arnaldi, R ; Alessandro, B ; Alexa, C ; Arnaldi, R ; Atayan, M ; Baglin, C ; Baldit, A ; Bedjidian, M ; Beolè, S ; Boldea, V et al.
The NA50 experiment at CERN SPS has studied charmonium production in Pb-Pb collisions at 158 GeV/c per nucleon. According to the theoretical predictions the observation of the suppression of the $J/\psi$ production yield is expected to be an unambiguous probe for a phase transition from ordinary nuclear matter towards a state in which quarks and gluons are deconfined. [...]
2004 - Published in : Acta Phys. Hung. A 19 (2004) 337-41
3.
Performances of a prototype for the ALICE muon trigger at LHC / Arnaldi, R ; Baldit, A ; Barret, V ; Bastid, N ; Blanchard, G ; Chiavassa, E ; Cortese, P ; Crochet, P ; Dellacasa, G ; De Marco, N et al.
ALICE, the experiment dedicated to the study of heavy ion collisions at LHC, will be equipped with a forward spectrometer to identify heavy quarkonium states from their decay into muons. The trigger system of the spectrometer consists of four planes of resistive plate chambers, front-end and fast-decision electronics. [...]
2004 - Published in : IEEE Trans. Nucl. Sci. 51 (2004) 375-382 IEEE Published version, local copy: PDF;
In : 13th IEEE-NPSS Real Time Conference 2003, Montreal, Canada, 18 - 23 May 2003, pp.375-382
4.
The production of $\phi , \omega$ and $\rho$ mesons in $p$-, $d$-, S- and Pb- induced reactions at the CERN SPS / Jouan, D ; Alessandro, B ; Alexa, C ; Arnaldi, R ; Atayan, M ; Baglin, C ; Baldit, A ; Bedjidian, M ; Beolè, S ; Boldea, V et al.
From proton, deuteron, S- and Pb-induced reactions, experiments NA38 and NA50 have measured muon pair production with various targets. In particular, the production rates of the $\phi, \omega$ and $\rho$ mesons have been simultaneously extracted and compared. [...]
2004 - Published in : J. Phys. G 30 (2004) S277-82
In : 7th International Conference on Strangeness in Quark Matter, Atlantic Beach, NC, USA, 12 - 17 Mar 2003, pp.S277-82
5.
Results from the NA50 experiment on $J/\psi$ suppression and charged particle pseudorapidity distributions in Pb-Pb collisions / NA50 Collaboration
We report preliminary results on $J/\psi$ suppression in Pb-Pb collisions at 158 GeV/c incident momentum. The new study is based on the most recent data collected with improved experimental conditions and extending over a large centrality range. [...]
2003
In : 32nd International Symposium on Multiparticle Dynamics, Alushta, Ukraine, 7 - 13 Sep 2002, pp.115-20
6.
Spatial resolution of RPC in streamer mode / Arnaldi, R ; Baldit, A ; Barret, V ; Bastid, N ; Blanchard, G ; Chiavassa, E ; Cortese, P ; Crochet, Philippe ; Dellacasa, G ; De Marco, N et al.
In the framework of an R and D program on the ALICE dimuon trigger system, the spatial resolution of Resistive Plate Chambers working in streamer mode has been investigated during beam tests. Preliminary studies with cosmic rays had evidenced a dependence of the charge profile to the high voltage and to the gas mixture. [...]
2002 - Published in : Nucl. Instrum. Methods Phys. Res., A 490 (2002) 51-57
7.
Pseudorapidity distributions of charged particles in Pb-Pb collisions at super proton synchrotron energies from the NA50 experiment / NA50 Collaboration
We present the measurements of charged particle pseudorapidity distributions $dN\_{ch}/d \eta$ performed by the NA50 experiment in Pb-Pb collisions at the CERN SPS. Measurements were done at incident energies of 40 GeV ($\sqrt{s}$ = 8.77 GeV) and 158 GeV ($\sqrt{s}$ = 17.3 GeV) per nucleon over a broad impact parameter range. [...]
2003 - Published in : Pramana - J. Phys. 60 (2003) 1059-1065
In : 4th International Conference on Physics and Astrophysics of Quark-Gluon Plasma, Jaipur, India, 26 - 30 Nov 2001, pp.1059-1065
8.
Study of deconfinement in NA50 / NA50 Collaboration
The J/$\psi$ production in 158 A GeV Pb-Pb interactions is studied, in the dimuon decay channel, as a function of centrality, as measured with the electromagnetic or, alternatively, with the very forward hadronic calorimeters. After a first sharp variation at mid- centrality, both patterns continue to fall down and-exhibit a curvature change at high centrality values. [...]
2003 - Published in : Pramana - J. Phys. 60 (2003) 817-28
In : 4th International Conference on Physics and Astrophysics of Quark-Gluon Plasma, Jaipur, India, 26 - 30 Nov 2001, pp.817-28
9.
Results on leptonic probes from NA50 / NA50 Collaboration
The NA50 Collaboration has performed a new measurement of the J/$\psi$ yield in Pb-Pb collisions at 158 GeV/nucleon in improved experimental conditions. Our preliminary analysis of the year 2000 data sample, while confirming the onset of anomalous suppression and the non saturation of the J/$\psi$ / Drell-Yan cross-section ratio, shows that peripheral Pb-Pb interactions follow the normal nuclear absorption pattern, which has in turn been established more precisely thanks to high statistics p-A data. [...]
2003 - Published in : Nucl. Phys. A 715 (2003) 243c-51c
In : 16th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, Nantes, France, 18 - 24 Jul 2002, pp.243c-51c
10.
Transverse momentum distribution of J/$\psi$ produced in Pb-Pb and p-A interactions at the CERN SPS / NA50 Collaboration
Muon pairs produced in Pb-Pb interactions at 158 GeV/c per nucleon and in p-A interactions at 400 GeV/c, together with older S-U results obtained at 200 GeV/c are used to study the transverse momentum and transverse mass distributions of the J/$\psi$. (13 refs)..
2003 - Published in : Nucl. Phys. A 715 (2003) 675c-8c
In : 16th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, Nantes, France, 18 - 24 Jul 2002, pp.675c-8c

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