Status of the QPACE Project (2008)
Baier, H., Boettiger, H., Drochner, M., Eicker, N., Fischer, U., Fodor, Z., ...
We give an overview of the QPACE project, which is pursuing the development of a massively parallel, scalable supercomputer for LQCD. The machine is a three-dimensional torus of identical processing...
Benabderrahmane, M. L., Herrmann, N., Wisniewski, K., Kecskemeti, J., Andronic, A., Barret, V., ...
The K0 meson production by pi- mesons of 1.15 GeV/c momentum on various nuclear targets was measured with the FOPI spectrometer at the SIS accelerator of GSI. Inclusive production cross-sections and...
Energy dependence of phi meson production in central Pb+Pb collisions at the CERN-SPS (2008)
Alt, C., Anticic, T., Baatar, B., Barna, D., Bartke, J., Betev, L., ...
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...
Report from the NA61/SHINE experiment at the CERN SPS (2008)
Abgrall, N, Aduszkiewicz, A, Andrieu, B, Anticic, T, Antoniou, N, Asryan, A, ...
The physics program of the NA61/SHINE (SHINE = SPS Heavy Ion and Neutrino Experiment) experiment at the CERN SPS consists of three subjects. In the first stage of data taking (2007-2008) the...
Event-by-event transverse momentum fluctuations in nuclear collisions at CERN SPS (2007)
Grebieszkow, K., Alt, C., Anticic, T., Baatar, B., Barna, D., Bartke, J., ...
The latest NA49 results on event-by-event transverse momentum fluctuations are presented for central Pb+Pb interactions over the whole SPS energy range (20A - 158A GeV). Two different methods are...
Alt, C, Anticic, T, Baatar, B, Barna, D, Bartke, J, Betev, L, ...
The centrality and system size dependence of multiplicity fluctuations of charged particles produced in nuclear collisions at 158 AGeV was studied by the NA49 collaboration. Centrality selected Pb+Pb...
Onset of Deconfinement in Pb+Pb Collisions at the CERN SPS (2006)
Seyboth, P, Alt, C, Anticic, T, Baatar, B, Barna, D, Bartke, J, ...
The NA49 fixed-target experiment studied high energy-density matter produced in nucleus-nucleus reactions at the CERN SPS. In central Pb+Pb collisions at 158A GeV the energy density at the early...
Energy Dependence of Multiplicity Fluctuations in Heavy Ion Collisions (2006)
Lungwitz, B, Alt, C, Anticic, T, Baatar, B, Barna, D, Bartke, J, ...
The energy dependence of multiplicity fluctuations was studied for the most central $Pb+Pb$ collisions at $20A$, $30A$, $40A$, $80A$ and $158A$ GeV by the NA49 experiment at the CERN SPS. The...
Onset of nuclear matter expansion in Au + Au collisions (2006)
Crochet, P., Rami, F., Gobbi, A., Dona, R., Coffin, J.P., Fintz, P., ...
Using the FOPI detector at GSI Darmstadt, excitation functions of collective flow components were measured for the Au+Au system, in the reaction plane and out of this plane, at seven incident...
Entropy production in the Au + Au reaction between 150 and 800 A MeV (2006)
Kuhn, C., Konopka, J., Coffin, J.P., Cerruti, C., Fintz, P., Guillaume, G., ...
The entropy per nucleon (S/A) has been extracted for the Au [(150800)A MeV] + Au reaction by using the phase I setup of the 4 pi facility at GSI, Darmstadt. The entropy has been obtained from the...
Elliptic flow of Lambda hyperons in Pb+Pb collisions at 158A GeV (2006)
Stefanek, G, Alt, C, Anticic, T, Baatar, B, Barna, D, Bartke, Jerzy, ...
The elliptic flow of Lambda hyperons has been measured by the NA49 experiment at the CERN-SPS in semi-central Pb+Pb collisions at 158A GeV. The standard method of correlating particles with the event...
Inclusive production of charged pions in p+C collisions at 158 GeV/c beam momentum (2006)
Alt, C, Baatar, B, Barna, D, Barr, G, Bartke, Jerzy, Betev, L, ...
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...
Inclusive Production of Charged Pions in $p^+ p$ Collisions at 158 GeV/c Beam Momentum (2005)
Alt, C, Anticic, T, Baatar, B, Barna, D, Bartke, Jerzy, Betev, L, ...
New results on the production of charged pions in p+p interactions are presented. The data come from a sample of 4.8 million inelastic events obtained with the NA49 detector at the CERN SPS at 158...
Inclusive production of charged pions in p+p collisions at 158 GeV/c beam momentum (2005)
Alt, C, Anticic, T, Baatar, B, Barna, D, Bartke, J, Betev, L, ...
New results on the production of charged pions in p+p interactions are presented. The data come from a sample of 4.8 million inelastic events obtained with the NA49 detector at the CERN SPS at 158...
NA49 results on hadron production: indications of the onset of deconfinement ? (2005)
Lungwitz, B, Alt, C, Anticic, T, Baatar, B, Barna, D, Bartke, J, ...
The NA49 experiment at the CERN SPS measured the energy and system size dependence of particle production in A+A collisions. A change of the energy dependence of several hadron production properties...
Upper Limit of D0 Production in Central Pb-Pb Collisions at 158A GeV (2005)
Alt, C, Anticic, T, Baatar, B, Barna, D, Bartke, Jerzy, Betev, L, ...
Results are presented from a search for the decays D0 -> Kmin piplus and D0bar -> Kplus pimin in a sample of 3.8x10^6 central Pb-Pb events collected with a beam energy of 158A GeV by NA49 at the CERN...
Eskef, M., Pelte, D., Goebels, G., Haefele, E., Herrmann, N., Korolija, M., ...
The mass distributions of baryon resonances populated in near-central collisions of Au on Au and Ni on Ni are deduced by defolding the $p_t$ spectra of charged pions by a method which does not depend...
Multistrange Hyperon Production in Pb+Pb collisions at 30, 40, 80 and 158 A$\cdot$GeV (2005)
Mitrovski, M, Alt, C, Anticic, T, Baatar, B, Barna, D, Bartke, Jerzy, ...
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,...
Droplet formation in expanding nuclear matter: a system-size dependent study (2004)
Reisdorf, W., Rami, F., De Schauenburg, B., Leifels, Y., Alard, J.P., Andronic, A., ...
Gazdzicki, M, Alt, C, Anticic, T, Baatar, B, Barna, D, Bartke, Jerzy, ...
The most recent data of NA49 on hadron production in nuclear collisions at CERN SPS energies are presented. Anomalies in the energy dependence of pion and kaon production in central Pb+Pb collisions...
Strangeness from 20 AGeV to 158 AGeV (2003)
Friese, V, Alt, C, Anticic, T, Baatar, B, Barna, D, Bartke, Jerzy, ...
New results from the energy scan programme of NA49, in particular kaon production at 30 AGeV and phi production at 40 and 80 AGeV are presented. The K+/pi+ ratio shows a pronounced maximum at 30...
Very high energy cosmic rays and search for physics beyond the standard model (2003)
The origin of highest energy cosmic rays (UHECR) is yet unknown. In order to understand their propagation we determine the probability that an ultrahigh energy (above 5\cdot 10^{19} eV) proton...
Search for Deconfinement in NA49 at the CERN SPS (2002)
Seyboth, P, Afanasiev, S V, Anticic, T, Barna, D, Bartke, Jerzy, Barton, R A, ...
Experiment NA49 at the Cern SPS uses a large acceptance detector for a systematic study of particle yields and correlations in nucleus-nucleus, nucleon-nucleus and nucleon-nucleon collisions....
Energy Dependence of Pion and Kaon Production in Central Pb+Pb Collisions (2002)
Afanasiev, S V, Anticic, T, Barna, D, Bartke, Jerzy, Barton, R A, Behler, M, ...
Results on the energy dependence of charged pion and kaon production in central Pb+Pb collisions at 40, 80 and 158 A GeV are presented and compared with data at lower and higher energies. The mean...
The critical point of lattice QCD on the \mu-T plane (2001)
We propose a method to study lattice QCD at finite temperature and chemical potential. We compare it with direct results and with the Glasgow method by using n_f=4 QCD at Im(\mu)\neq 0. We locate the...
Results from FOPI on strangeness in nuclear matter at SIS energies (2001)
Alard, J.P., Andronic, A., Averbeck, R., Barret, V., Basrak, Z., Bastid, N., ...
Afanasiev, S V, Anticic, T, Bächler, J, Barna, D, Barnby, L S, Bartke, Jerzy, ...
We present the first measurement of fluctuations from event to event in the production of strange particles in collisions of heavy nuclei. The ratio of charged kaons to charged pions is determined...
Hadronic Expansion Dynamics in Central Pb+Pb Collisions at 158 GeV per Nucleon (2000)
Appelshäuser, H, Bächler, J, Bailey, S J, Barnby, L S, Bartke, Jerzy, Barton, R A, ...
Two-particle correlation functions of negative hadrons over wide phase space, and transverse mass spectra of negative hadrons and deuterons near mid-rapidity have been measured in central Pb+Pb...
Isospin tracing: a probe of non-equilibrium in central heavy-ion collisions (2000)
Rami, F, Leifels, Y, De Schauenburg, B, Gobbi, A, Hong, B, Alard, J P, ...
Four different combinations of $^{96}_{44}$Ru and $^{96}_{40}$Zr nuclei, both as projectile and target, were investigated at the same bombarding energy of 400$A$ MeV using a $4 \pi$ detector. The...
Transition from in-plane to out-of-plane azimuthal enhancement in Au+Au collisions (2000)
Andronic, A., Stoicea, G., Petrovici, M., Simion, V., Crochet, P., Alard, J.P., ...
Sideward flow of $K^{+}$ in Ru+Ru and Ni+Ni reactions at SIS energies (2000)
Crochet, Philippe, Herrmann, N, Wisniewski, K, Leifels, Y, Averbeck, R, Devismes, A, ...
Isospin tracing : a probe of nonequilibrium in central heavy ion collisions (2000)
Rami, F., Leifels, Y., De Schauenburg, B., Gobbi, A., Hong, B., Alard, J.P., ...
Centrality Dependence of Directed and Elliptic Flow at the SPS (1999)
Poskanzer, Arthur M., Voloshin, Sergei A., Bachler, J., Barna, D., Barnby, L.S., ...
New data with a minimum bias trigger for 158 GeV/nucleon Pb + Pb have been analyzed. Directed and elliptic flow as a function of rapidity of the particles and centrality of the collision are...
Two-proton correlations from 158 A GeV Pb + Pb central collisions (1999)
Appelshäuser, H, Bächler, J, Bailey, S J, Barna, D, Barnby, L S, Bartke, Jerzy, ...
The two-proton correlation function at midrapidity from Pb+Pb central collisions at 158 AGeV has been measured by the NA49 experiment. The results are compared to model predictions from static...
Ritman, J.L., Herrmann, N., Best, D., Alard, J.P., Amouroux, V., Bastid, N., ...
Particles with strange quark content produced in the system 1.93 AGeV $^{58}$Ni on $^{58}$Ni have been investigated at GSI Darmstadt with the FOPI detector system. The correlation of these produced...
Out-of-plane emission of nuclear matter in Au + Au collisions between 100 and 800 A MeV (1999)
Bastid, N., Buta, A., Crochet, P., Dupieux, P., Petrovici, M., Rami, F., ...
Charged pions from Ni on Ni collisions between 1 and 2 AGeV (1999)
Pelte, D., Eskef, M., Goebels, G., Hafele, E., Herrmann, N., Korolija, M., ...
Charged pions from Ni + Ni reactions at 1.05, 1.45 and 1.93 AGeV are measured with the FOPI detector. The mean $\pi^{\pm}$ multiplicities per mean number of participants increase with beam energy, in...
Abundance of Delta resonances in $^{58}$Ni + $^{58}$Ni collisions between 1 and 2 AGeV (1999)
Hong, B., Herrmann, N., Ritman, J.L., Best, D., Gobbi, A., Hildenbrand, K.D., ...
Charged pion spectra measured in 58Ni-58Ni collisions at 1.06, 1.45 and 1.93 AGeV are interpreted in terms of a thermal model including the decay of Delta resonances. The transverse momentum spectra...
$K^+$ production in the reaction $^{58}$Ni + $^{58}$Ni at incident energies from 1 to 2 A GeV (1999)
Best, D., Herrmann, N., Hong, B., Kirejczyk, M., Ritman, J., Wisniewski, K., ...
Semi-inclusive triple differential multiplicity distributions of positively charged kaons have been measured over a wide range in rapidity and transverse mass for central collisions of $^{58}$Ni with...
Azimuthal anisotropies as stringent test for nuclear transport models (1999)
Crochet, P., Rami, F., Dona, R., Coffin, J.P., Fintz, P., Guillaume, G., ...
Azimuthal distributions of charged particles and intermediate mass fragments emitted in Au+Au collisions at 600AMeV have been measured using the FOPI facility at GSI-Darmstadt. Data show a strong...
Stopping and radial flow in central $^{58}$Ni + $^{58}$Ni collisions between 1A and 2A GeV (1999)
Hong, B., Herrmann, N., Ritman, J.L., Best, D., Gobbi, A., Hildenbrand, K.D., ...
The production of charged pions, protons and deuterons has been studied in central collisions of 58Ni on 58Ni at incident beam energies of 1.06, 1.45 and 1.93 AGeV. The dependence of...
Flow angle from intermediate mass fragment measurements (1999)
Rami, F., Crochet, P., Dona, R., De Schauenburg, B., Wagner, P., Alard, J.P., ...
Directed sideward flow of light charged particles and intermediate mass fragments was measured in different symmetric reactions at bombarding energies from 90 to 800 AMeV. The flow parameter is found...
Central collisions of Au on Au at 150, 250 and 400 A.MeV (1999)
Reisdorf, W., Best, D., Gobbi, A., Herrmann, N., Hildenbrand, K.D., Hong, B., ...
Collisions of Au on Au at incident energies of 150, 250 and 400 A MeV were studied with the FOPI-facility at GSI Darmstadt. Nuclear charge (Z 16) and velocity of the products were detected with full...
The NA49 large acceptance hadron detector (1999)
Afanasiev, S V, Alber, T, Appelshäuser, H, Bächler, J, Barna, D, Barnby, L S, ...
The NA49 detector is a wide acceptance spectrometer for the study of hadron production in p+p, p+A, and A+A collisions at the CERN SPS. The main components are 4 large volume TPCs for tracking and...
Directed and Elliptic Flow in 158 GeV/Nucleon Pb + Pb Collisions (1997)
Appelshäuser, H, Bächler, J, Bailey, S J, Barnby, L S, Bartke, J, Barton, R A, ...
The directed and elliptic flow of protons and charged pions has been observed from the semi-central collisions of a 158 GeV/nucleon Pb beam with a Pb target. The rapidity and transverse momentum...
$\Xi (\Omega)$ production in Pb + Pb collisions at 158 GeV/c (1997)
Odyniec, Grazyna Janina, Afanasiev, S V, Alber, T, Appelshäuser, H, Bächler, J, Bailey, S J, ...
Onset of nuclear matter expansion in Au+Au collisions (1997)
Crochet, Philippe, Rami, F, Gobbi, A, Donà, R, Coffin, J P, Fintz, P, ...
Using the FOPI detector at GSI Darmstadt, excitation functions of collective flow components were measured for the Au+Au system, in the reaction plane and out of this plane, at seven incident...
We discuss the perturbative running of alpha_s in a model independent way. Our analysis contains the data on the hadronic tau decay and all the total hadronic cross sections in e+e- annihilation...
Electroweak phase transition by four dimensional simulations (1996)
Csikor, Ferenc, Fodor, Z, Hein, J, Heitger, J, Jaster, A, Montvay, István
The finite temperature phase transition in the SU(2)-Higgs model at a Higgs boson mass $M_H \simeq 35$ GeV is studied in numerical simulations on four dimensional lattices with time-like extensions...
Out-of-plane emission of nuclear matter in Au + Au collisions between 100 and 800 AMeV (1996)
Bastid, N, Butà, A, Crochet, Philippe, Dupieux, P, Petrovici, M, Rami, F, ...
Azimuthal correlations of transverse energy for Pb on Pb at 158 GeV/nucleon (1996)
Wienold, T, Alber, T, Appelshäuser, H, Bächler, J, Bartke, Jerzy, Bialkowska, H, ...
The SU(2)-Higgs model on asymmetric lattices (1996)
We calculate the {\cal O}(g^2,\lambda) corrections to the coupling anisotropies of the SU(2)-Higgs model on lattices with asymmetric lattice spacings. These corrections are obtained by a one-loop...
Csikor, Ferenc, Fodor, Z, Hein, J, Jaster, A, Montvay, István
The finite temperature phase transition in the SU(2) Higgs model at a Higgs boson mass M_H \simeq 34 GeV is studied in numerical simulations on four-dimensional lattices with time-like extensions up...
First results from NA49 on Pb + Pb collisions at 158 GeV/nucleon (1995)
Margetis, S, Alber, T, Appelshäuser, H, Bächler, J, Bartke, Jerzy, Bialkowska, H, ...
Interface tension of the electroweak phase transition (1995)
Csikor, Ferenc, Fodor, Z, Hein, J, Heitger, J
In our nonperturbative lattice investigation we study the interface tension of the finite-temperature electroweak phase transition. In this analysis the Higgs mass has been chosen to be about 35 GeV....
Study of in-medium effects with the Au + Au FOPI data at 400 A.MeV (1995)
Ramillien, V, Dupieux, P, Alard, J P, Amouroux, V, Bastid, N, Berger, L, ...
Kotte, R, Kämpfer, B, Mösner, J, Neubert, W, Wohlfarth, D, Alard, J P, ...