CERN Accelerating science

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1.
Indications for the onset of deconfinement in nucleus nucleus collisions / NA49 collaboration
The hadronic final state of central Pb+Pb collisions at 20, 30, 40, 80, and 158 AGeV has been measured by the CERN NA49 collaboration. The mean transverse mass of pions and kaons at midrapidity stays nearly constant in this energy range, whereas at lower energies, at the AGS, a steep increase with beam energy was measured. [...]
nucl-ex/0410041; nucl-ex/0410041.- 2005 - 11 p. - Published in : 10.1142/9789812702227_0043 Fulltext: arXiv:nucl-ex_0410041 - PDF; 0410041 - PDF;
In : 32nd International Conference on High-energy Physics, pp.343-346
2.
Long-range correlations in PbPb collisions at 158 a *GeV / Alt, C (Frankfurt U.) ; Anticic, T (Boskovic Inst., Zagreb) ; Baatar, B (Dubna, JINR) ; Barna, D (Budapest, RMKI) ; Bartke, J (Cracow, INP) ; Betev, L (Frankfurt U. ; CERN) ; Bialkowska, H (Warsaw, Inst. Nucl. Studies) ; Blume, C (Frankfurt U.) ; Boimska, B (Warsaw, Inst. Nucl. Studies) ; Botje, M (NIKHEF, Amsterdam) et al. /NA49 ; SPbSU Group
We present the 1st results of the event-by-event study of long-range correlations between event mean Pt and charged particle multiplicity using NA49 experimental data in two separated rapidity intervals in 158 A *Ge V Pb Pb collisions at the CERN SPS. Noticeable long range correlations are found. [...]
2005 - 10 p. - Published in : : 1 (2005) , pp. 222-231 Fulltext: PDF;
In : 17th International Baldin Seminar on High Energy Physics Problems: Relativistic Nuclear Physics and Quantum Chromodynamics, Vol.1, Dubna, Russian Federation, 27 Sep - 1 Oct 2004, pp.222-231
3.
Ladungsfluktationen in ultrarelativistischen Blei-Blei-Stößen bei 30, 40, 80 und 160 AGeV / Zaranek, Jacek
57 p.

Full text
4.
Energy dependence of hadronic observables in central Pb+Pb reactions at the CERN SPS / NA49 Collaboration
In this contribution the energy dependence of various hadronic observables as measured by the NA49 experiment in the beam energy range between 20 and 158A GeV is presented. These include $m_{t}$ and rapidity distributions, particle ratio fluctuations, as well as HBT radii. [...]
nucl-ex/0405010.- Geneva : CERN, 2004 - Published in : Acta Phys. Hung. A 24 (2005) 31-7 Conference paper: PDF;
In : 20th Winter Workshop on Nuclear Dynamics, Trelawny Beach, Jamaica, 15 - 20 Mar 2004
5.
Transverse Momentum Fluctuations in Nuclear Collisions at 158A GeV / NA49 Collaboration
Results are presented on event-by-event fluctuations in transverse momentum of charged particles, produced at forward rapidities in p+p, C+C, Si+Si and Pb+Pb collisions at 158A GeV. Three different characteristics are discussed: the average transverse momentum of the event, the $\Phi_{PT}$ fluctuation measure and two-particle transverse momentum correlations. [...]
hep-ex/0311009.- 2004 - 14 p. - Published in : Phys. Rev. C 70 (2004) 34902-34916 APS Published version, local copy: PDF; Fulltext: PDF; External link: Access to fulltext document
6.
Inclusive production of charged pions in p+C collisions at 158 GeV/c beam momentum / NA49 Collaboration
The production of charged pions in minimum bias p+C interactions is studied using a sample of 377000 inelastic events obtained with the NA49 detector at the CERN SPS at 158 GeV/c beam momentum. The data cover a phase space area ranging from 0 to 1.8 GeV/c in transverse momentum and from -0.1 to 0.5 in Feynman x. [...]
hep-ex/0606028.- 2007 - 31 p. - Published in : Eur. Phys. J. C 49 (2007) 897-917 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-ex/0606028 PDF
7.
Electric charge fluctuations in central Pb+Pb collisions at 20A, 30A, 40A, 80A, and 158A GeV / NA49 Collaboration
Results are presented on event-by-event electric charge fluctuations in central Pb+Pb collisions at 20, 30, 40, 80 and 158 AGeV. The observed fluctuations are close to those expected for a gas of pions correlated by global charge conservation only. [...]
nucl-ex/0406013.- 2004 - 19 p. - Published in : Phys. Rev. C 70 (2004) 064903-1-7 APS Published version, local copy: PDF; Fulltext: PDF;
8.
System size and centrality dependence of the balance function in A+A collisions at $\sqrt{s_NN}$ =172 GeV / NA49 Collaboration
Electric charge correlations were studied for $p+p$, C+C, Si+Si, and centrality selected Pb+Pb collisions at $\sqrt s_{NN}=17.2$ Ge V with the NA49 large acceptance detector at the CERN SPS. In particular, long-range pseudorapidity correlations of oppositely charged particles were measured using the balance function method. [...]
hep-ex/0409031.- 2005 - 24 p. - Published in : Phys. Rev. C 71 (2005) 34903-1-10 APS Published version, local copy: PDF; Fulltext: PDF;
9.
Observation of an Exotic S = -2, Q = -2 Baryon Resonance in Proton-Proton Collisions at the CERN SPS / NA49 Collaboration
Results of resonance searches in the $\Xi^{-} \pi^{-}, \Xi^{-} \pi^{+}, \bar{Xi}^{+} \pi-$ and $\bar{Xi}^{+} \pi^{+}$ invariant mass spectra in proton-proton collisions at $\sqrt{s}=17.2$ GeV are presented. Evidence is shown for the existence of a narrow $\Xi^{-} \pi^{-}$ baryon resonance with mass of 1.862+/-0.002 GeV/c^2 and width below the detector resolution of about 0.018 GeV/c^2. [...]
hep-ex/0310014.- München : Max-Planck Inst., 2004 - 5 p. - Published in : Phys. Rev. Lett. 92 (2004) 042003 Access to fulltext document: PDF; External link: hep-ex/0310014 PDF
10.
Multistrange Hyperon Production in Pb+Pb collisions at 30, 40, 80 and 158 A$\cdot$GeV / NA49 Collaboration
A non-monotonic energy dependence of the $K^{+} / \pi^{+}$ ratio with a sharp maximum close to 30 A$\cdot$GeV is observed in central Pb+Pb collisions. Within a statistical model of the early stage, this is interpreted as a sign of the phase transition to a QGP, which causes a sharp change in the energy dependence of the strangeness to entropy ratio. [...]
nucl-ex/0312022.- Geneva : CERN, 2004 - 3 p. - Published in : Prog. Part. Nucl. Phys. 53 (2004) 269-272 Access to fulltext document: PDF; External link: nucl-ex/0312022 PDF

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