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.
Characterisation of the ALICE TPC READOUT CHIP / Bramm, Roland
The extraction and optimisation of the ALTRO Parameters out of the ALICE TPC data is described, including the performance measurment of this set. [...]
physics/0501052 ; CERN-THESIS-2005-077 - Frankfurt : U., 2005. - 79 p.

4.
The ALICE TPC, a large 3-dimensional tracking device with fast readout for ultra-high multiplicity events / Alme, J. (Bergen U.) ; Andres, Y. (CERN) ; Appelshauser, H. (Frankfurt U., FIAS) ; Bablok, S. (Bergen U.) ; Bialas, N. (Bergen U.) ; Bolgen, R. (Bergen U.) ; Bonnes, U. (Darmstadt, Tech. Hochsch.) ; Bramm, R. (Darmstadt, GSI) ; Braun-Munzinger, P. (Darmstadt, Tech. Hochsch. ; Darmstadt, GSI ; Darmstadt, EMMI ; Frankfurt U., Inst. Kernphys.) ; Campagnolo, R. (CERN) et al.
The design, construction, and commissioning of the ALICE Time-Projection Chamber (TPC) is described. It is the main device for pattern recognition, tracking, and identification of charged particles in the ALICE experiment at the CERN LHC. [...]
arXiv:1001.1950.- 2010 - 56 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 622 (2010) 316-367 Fulltext: PDF; External link: Preprint
5.
Three-Dimensional two-pion source image from Pb+Pb Collisions at $\sqrt s_{NN}=17.3$ GeV : New constraints for source breakup dynamics / NA49 Collaboration
Source imaging methodology is used to provide a three-dimensional two-pion source function for mid-rapidity pion pairs with $p_T<70$ MeV/c in central ($0-7%$) Pb+Pb collisions at $\sqrt s_{NN}$=17.3 GeV. Prominent non-Gaussian tails are observed in the pion pair transverse momentum (outward) and in the beam (longitudinal) directions. [...]
arXiv:0809.1445.- 2010 - 6 p. - Published in : Phys. Lett. B 685 (2010) 41-46 Fulltext: PDF; External link: Preprint
6.
Energy dependence of particle ratio fluctuations in central Pb+Pb collisions from $\sqrt{s_{_{NN}}} =$~6.3 to 17.3 GeV / NA49 Collaboration
We present recent measurements of the energy dependence of event-by-event fluctuations in the $K/pi$ and $(p + \bar{p})/pi$ multiplicity ratios in heavy ion collisions at the CERN SPS. The particle ratio fluctuations were obtained for central Pb+Pb collisions at five collision energies, $\sqrt{s_{_{NN}}}$, between 6.3 and 17.3 GeV. [...]
arXiv:0808.1237.- 2009 - 11 p. - Published in : Phys. Rev. C 79 (2009) 044910 APS Published version, local copy: PDF; Fulltext: PDF; External link: Preprint
7.
Energy dependence of $\phi$ meson production in central Pb+Pb collisions at $\sqrt{s_{NN}}$=6 to 17 GeV / NA49 Collaboration
Phi meson production is studied by the NA49 collaboration in central Pb+Pb collisions at 20A, 30A, 40A, 80A and 158A GeV beam energy. The data are compared to measurements at lower and higher energies and to microscopic and thermal models. [...]
arXiv:0806.1937.- 2008 - 18 p. - Published in : Phys. Rev. C 78 (2008) 044907 APS Published version, local copy: PDF; Fulltext: PDF; External link: DURHAM
8.
Energy dependence of fluctuations in central Pb+Pb collisions from NA49 at the CERN SPS / NA49 Collaboration
The latest NA49 results on fluctuations of multiplicity and average transverse-momentum analyzed on an event-by-event basis are presented for central Pb+Pb interactions over the whole SPS energy range (20A - 158A GeV). The scaled variance of the multiplicity distribution decreases with collision energy whereas the $\Phi_{p_{T}}$ measure of $$ fluctuations is small and independent of collision energy. [...]
arXiv:0805.2245.- 2012 - 5 p. - Published in : J.Phys.G 35 (2008) 104091 Fulltext: PDF; External link: Preprint
9.
Energy dependence of $\Lambda$ and $\Xi$ production in central Pb+Pb collisions at 20A,30A,40A,80A, and 158A GeV measured at the CERN Super Proton / NA49 Collaboration
Results on $\Lambda$, $\bar{\Lambda}$, $\Xi^{-}$, and $\bar{\Xi}^{+}$ production in central Pb+Pb reactions at 20A, 30A, 40A, 80A, and 158A GeV are presented. The energy dependence of transverse mass spectra, rapidity spectra, and multiplicities is discussed. [...]
arXiv:0804.3770.- 2008 - 17 p. - Published in : Phys. Rev. C 78 (2008) 034918 APS Published version, local copy: PDF; Fulltext: PDF; External link: Fulltext
10.
Energy dependence of multiplicity fluctuations in heavy ion collisions at 20A to 158A GeV / NA49 Collaboration
Multiplicity fluctuations of positively, negatively and all charged hadrons in the forward hemisphere were studied in central Pb+Pb collisions at 20A, 30A, 40A, 80A and 158A GeV. The multiplicity distributions and their scaled variances $\omega$ are presented in dependence of collision energy as well as of rapidity and transverse momentum. [...]
arXiv:0712.3216.- 2008 - 25 p. - Published in : Phys. Rev. C 78 (2008) 034914 APS Published version, local copy: PDF; Fulltext: PDF; External link: Fulltext

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