Refine
Year of publication
- 2003 (93) (remove)
Document Type
- Preprint (33)
- Article (23)
- Doctoral Thesis (23)
- diplomthesis (7)
- Periodical (3)
- Diploma Thesis (2)
- Part of Periodical (2)
Is part of the Bibliography
- no (93) (remove)
Keywords
- baryon (3)
- Dirac (2)
- collision (2)
- heavy-ion collisions (2)
- meson (2)
- quark (2)
- Antiproton (1)
- Baryon (1)
- Brechungsindex (1)
- Brookhaven National Laboratory (1)
- CHO (1)
- Charmed mesons (1)
- Charmed quarks (1)
- Chemikalie (1)
- Chinese hamster ovary (1)
- Collision (1)
- Deoxymannojirimycin (1)
- Distributed software development (1)
- E-beam induced deposition (1)
- EBID (1)
- Einzel-Elektronen-Transistor (1)
- Eisengranate (1)
- Elektronen-Korrelation (1)
- Elektronenpaar (1)
- Elektronenstrahlinduzierte Deposition (1)
- Elektrophysiologie (1)
- GABA Transporter Typ 1 (1)
- Geometrical modelling (1)
- Geometrisches Modellieren (1)
- Gleichgewicht (1)
- Gold-197-Reaktion (1)
- Gold-197-Target (1)
- Hadron (1)
- Hartree (1)
- Heliumatom (1)
- Hochgeladene Ionen (1)
- Hohe Energie (1)
- J/psi yield (1)
- Johann Wolfgang Goethe-Universität Frankfurt am Main / Institut für Angewandte Physik / Bericht (1)
- Kollision (1)
- Kollisionen des schweren Ions (1)
- Kosmischer Strahl (1)
- Lambverschiebung (1)
- Laser (1)
- Lasererzeugtes Plasma ; FIR ; Puls <Technik> (1)
- Magnetooptik (1)
- Magnetooptischer Effekt (1)
- Masse (1)
- Meson (1)
- Meson production (1)
- Neutron (1)
- Objectoriented technology (1)
- Objektorientierte Technologie (1)
- Optische Eigenschaft (1)
- Optoelektronik (1)
- Particle interactions (1)
- Partikel (1)
- Partikel-Wechselwirkungen (1)
- Patch-clamp (1)
- Perowskitstruktur (1)
- Photoabsorption (1)
- Photokonduktive Antennen (1)
- Photonic band gap (1)
- Photonic crystals (1)
- Photonische Bandlücke (1)
- Photonische Kristalle (1)
- Plasma (1)
- Potential (1)
- Proton (1)
- Protonen (1)
- Quantenelektrodynamik (QED) (1)
- Quark (1)
- Relativistic heavy-ion collisions (1)
- Room temperature (1)
- SENECA model (1)
- Sarkoplasmatisches Retikulum ; Calcium ; ATP ; Wechselwirkung (1)
- Simulation (1)
- Software engineering (1)
- Softwaretechnik (1)
- Spektren (1)
- Symmetrie (1)
- Teilchen (1)
- Terahertzstrahlung (1)
- Ultraschnelle Magnetfeldsensorik (1)
- Verdünnt magnetische Halbleiter (1)
- Verschränkter Zustand (1)
- Wasserstoffmolekül (1)
- atomare Strukturtheorie (1)
- critical phenomena (1)
- dMM (1)
- equilibrium (1)
- hadron (1)
- hadron interaction models (1)
- hadronic (1)
- hadronic model (1)
- heavy ion (1)
- heavy ion collisions (1)
- heiße hadronic Materie (1)
- heiße und dichte Materie (1)
- high energy (1)
- high energy cosmic ray (1)
- hot and dense matter (1)
- hot hadronic matter (1)
- hybrid approach to air shower simulations (1)
- inclusive reaction (1)
- lattice field theory (1)
- low energy hadronic model (1)
- masse (1)
- neutron and proton chemical potential (1)
- non-equilibrium dynamics (1)
- nuclear matter (1)
- p p (1)
- particle ratios (1)
- particles (1)
- quantum chromodynamics (1)
- quark gluon plasma (1)
- relativistic (1)
- relativistic fluid of quarks (1)
- relativistic heavy ion collider (1)
- scattering (1)
- schwere Ion-Kollisionen (1)
- spectra (1)
- symmetry potential (1)
- Übergangsmetalloxide (1)
Institute
- Physik (93) (remove)
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 158 AGeV. Three different characteristics are discussed: the average transverse momentum of the event, the Phi_pT fluctuation measure and two-particle transverse momentum correlations. In the kinematic region explored, the dynamical fluctuations are found to be small. However, a significant system size dependence of Phi_pT is observed, with the largest value measured in peripheral Pb+Pb interactions. The data are compared with predictions of several models. PACS numbers: 14.20.Jn, 13.75.Cs, 12.39.-x
Observation of an exotic S = -2, Q = -2 baryon resonance in proton-proton collisions at the CERN SPS
(2003)
Results of resonance searches in the Xi- pi-, Xi- pi+, antiXi+ pi- and antiXi+ 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. The significance is estimated to be 4.0 sigma. This state is a candidate for the hypothetical exotic Xi_(3/2)^-- baryon with S = -2, I = 3/2 and a quark content of (d s d s ubar). At the same mass a peak is observed in the Xi- pi+ spectrum which is a candidate for the Xi_(3/2)^0 member of this isospin quartet with a quark content of (d s u s dbar). The corresponding antibaryon spectra also show enhancements at the same invariant mass.
A non-monotonic energy dependence of the K + / pi + ratio with a sharp maximum close to 30 A 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. This observation naturally motivates us to study the production of multistrange hyperons (Xi, Omega) as a function of the beam energy. Furthermore it was suggested that the kinematic freeze-out of Omega takes place directly at QGP hadronization. If this is indeed the case, the transverse momentum spectra of the Omega directly reflect the transverse expansion velocity of a hadronizing QGP. In this report we show preliminary NA49 results on Omega - and Omega + production in central Pb+Pb collisions at 40 and 158 A GeV and compare them to measurements of Xi - and Xi + production in central Pb+Pb collisions at 30, 40, 80 and 158 A GeV.