Refine
Year of publication
Document Type
- Preprint (100)
- Article (68)
- Conference Proceeding (15)
- Contribution to a Periodical (1)
- Review (1)
Has Fulltext
- yes (185)
Is part of the Bibliography
- no (185) (remove)
Keywords
- Kollisionen schwerer Ionen (16)
- heavy ion collisions (14)
- UrQMD (6)
- QGP (5)
- Quark-Gluon-Plasma (5)
- Quark Gluon Plasma (4)
- Drell-Yan (3)
- Hadron (3)
- Heavy-ion collisions (3)
- MEMOs (3)
- SPS (3)
- Ultrarelativistic Quantum Molecular Dynamics (3)
- UrQMD Modell (3)
- quark-gluon-plasma (3)
- Black holes (2)
- Equation of state (2)
- Heavy ion collisions (2)
- LHC (2)
- Meson (2)
- Molekulare Dynamik (2)
- Monte Carlo simulations (2)
- Particle and resonance production (2)
- Quark (2)
- RHIC (2)
- RQMD (2)
- Relativistic heavy-ion collisions (2)
- Tevatron (2)
- Ultrarelativistic Quantum Molecular Model (2)
- Ultrarelativistisches Quant Molekulares Modell (2)
- UrQMD model (2)
- Zustandsgleichung (2)
- black hole (2)
- black holes (2)
- equation of state (2)
- große Extradimensionen (2)
- hadronic (2)
- heavy ions (2)
- heavy-ion collisions (2)
- large extra dimensions (2)
- minimal length (2)
- quark (2)
- quark-gluon plasma (2)
- relativistic quantum molecular dynamics (2)
- schwarze Löcher (2)
- schwere Ion Kollision (2)
- thermalization (2)
- ultrarelativistisch (2)
- ADD (1)
- AGS (1)
- Absorption (1)
- Anisotropic flow (1)
- Anti de Sitter space (1)
- Baryon (1)
- Black hole (1)
- Bremsstrahlung (1)
- Charmed meson production (1)
- Charmonium Produktion (1)
- Charmonium production (1)
- Chiral phase transition (1)
- D-Dbar (1)
- DNA repair (1)
- Deuteron (1)
- Dilepton (1)
- Drell-Yan production (1)
- Drell-Yan-Prozess (1)
- Dynamic transport (1)
- Dynamik (1)
- Elektron (1)
- Elsevier (1)
- Energie (1)
- Ereignisschwankungen (1)
- Event-by-event (1)
- Event-by-event fluctuations (1)
- Extra dimensions (1)
- Far from equilibrium (1)
- Fluctuations (1)
- Freiheitsgrad (1)
- Gravitational radiation (1)
- Gyromagnetic Moment (1)
- HBT correlation (1)
- HBT interferometry (1)
- HBT puzzle (1)
- HICs (1)
- Hadron Materie (1)
- Hadron potentials (1)
- Hohe Energie (1)
- Holography (1)
- Hydrogen ground state (1)
- Hypernuclei (1)
- J/ϕ (1)
- Kollision (1)
- Kollisionen schwere Ionen (1)
- Korrelation (1)
- Kosmischer Strahl (1)
- LaTeX (1)
- Lepton (1)
- Local thermodynamical equilibrium (1)
- Meson production (1)
- Metastable Exotic Multistrange Objects (1)
- Modell (1)
- Monte-Carlo model for relativistic heavy ion collisions (1)
- Nichtgleichgewicht (1)
- Non-equilibrium effects (1)
- Nonequilibrium dynamics (1)
- Nuclear fragments production (1)
- Partikelzahlschwankung (1)
- Plasma (1)
- QGP signals (1)
- QMD Modell (1)
- QMD model (1)
- Quanten-Molekular-Dynamic (1)
- Quanten-Molekular-Dynamik (1)
- Quark Materie (1)
- Quark gluon Plasma (1)
- Quark gluon plasma (1)
- RHIC energies (1)
- Recombination (1)
- Relativistic heavy-ion reactions (1)
- SENECA model (1)
- Schwerionenphysik (1)
- Shear viscosity (1)
- Statistical model (1)
- Strangelets (1)
- Template (1)
- Thermalization (1)
- Transport (1)
- UHECR (1)
- URQMD (1)
- Ultra-relativistic Quantum Molecular Dynamic (1)
- Ultra-relativistic Quantum Molecular Dynamics model (1)
- Ultrarelativisitic Quantum Molecular Dynamics model (1)
- Ultrarelativisitisches (1)
- Ultrarelativistisches Quant Molekular Dynamik (1)
- Unparticle parameter constraints (1)
- Unparticle physics (1)
- Vielkörperkorrelationen (1)
- X(3872) (1)
- absorption (1)
- baryon (1)
- bremsstrahlung (1)
- canonical suppression (1)
- collision (1)
- coloured quark dynamic (1)
- cosmic rays (1)
- degrees of freedom (1)
- deuteron (1)
- dilepton (1)
- dileptons (1)
- elastic particle (1)
- electron (1)
- elliptic flow analysis (1)
- elsarticle.cls (1)
- energy (1)
- event-by-event fluctuations (1)
- extra dimension (1)
- extra dimensions (1)
- femtoscopy data (1)
- flow (1)
- gravitational radiation (1)
- großer hadron collider (1)
- gyromagnetic moment (1)
- hadron (1)
- hadron hadron Kollision (1)
- hadron hadron collision (1)
- hadron interaction models (1)
- hadron matter (1)
- hadronic freeze-out (1)
- hadronic model (1)
- heavy ion colliders (1)
- heavy ion collision (1)
- heavy-flavor quarks (1)
- heiße Materie (1)
- high energie (1)
- high energy cosmic ray (1)
- high-energy nuclear collisions (1)
- higher twist effects (1)
- hohe Energie (1)
- hot matter (1)
- hybrid approach to air shower simulations (1)
- hydrodynamical model (1)
- hydrodynamisches Modell (1)
- hydrogen energy levels (1)
- large hadron collider (1)
- lepton (1)
- lokales thermodynamisches Gleichgewicht (1)
- low energy hadronic model (1)
- many-body correlations (1)
- meson (1)
- microdosimetry (1)
- microscopic model (1)
- microscopic transport theory (1)
- mikroskopische Transporttheorie (1)
- mikroskopisches Modell (1)
- minimale Länge (1)
- mixing of hadron sources (1)
- modified Coulomb potential (1)
- multiparton interactions (1)
- muon (1)
- nanolesions (1)
- nuclear collisions (1)
- p A¯ reactions (1)
- particle number fluctuations (1)
- particle ratios (1)
- plasma (1)
- quark gluon plasma (1)
- quark matter (1)
- quasi-stable black holes (1)
- quasistabile schwarze Löcher (1)
- radiation-induced nanostructures (1)
- relativistic (1)
- relativistic heavy ion collision (1)
- relativistic heavy ions (1)
- relativistische (1)
- relativistische schwere Ion Kollision (1)
- schwarzes Loch (1)
- schwere Ione (1)
- schwere Ionen Kollision (1)
- space-momentum correlation (1)
- strangelets (1)
- strangeness (1)
- string T-duality (1)
- total cross-section (1)
- transport models (1)
- ultra-relativistic heavy ion collision (1)
- ultrarelativistic heavy ion collision (1)
- ultrarelativistic heavy-ion collision (1)
- ultrarelativistische (1)
- ultrarelativistische Kollision des schweren Ionen (1)
- ultrarelativistische schwere Ion Kollision (1)
- zero-point length (1)
- η/s (1)
Institute
Abstract: We study transverse expansion and directed flow in Au(11AGeV)Au reactions within a multi-fluid dynamical model. Although we do not employ an equation of state (EoS) with a first order phase transition, we find a slow increase of the transverse velocities of the nucleons with time. A similar behaviour can be observed for the directed nucleon flow. This is due to non-equilibrium e ects which also lead to less and slower conversion of longitudinal into transverse momentum. We also show that the proton rapidity distribution at CERN energies, as calculated within this model, agrees well with the preliminary NA44-data.
The Karl Schwarzschild Meeting 2017 (KSM2017) has been the third instalment of the conference dedicated to the great Frankfurter scientist, who derived the first black hole solution of Einstein's equations about 100 years ago.
The event has been a 5 day meeting in the field of black holes, AdS/CFT correspondence and gravitational physics. Like the two previous instalments, the conference continued to attract a stellar ensemble of participants from the world's most renowned institutions. The core of the meeting has been a series of invited talks from eminent experts (keynote speakers) as well as the presence of plenary research talks by students and junior speakers.
List of Conference photo and poster, Sponsors and funding acknowledgments, Committees and List of participants are available in this PDF.
The SENECA model, a new hybrid approach to air shower simulations, is presented. It combines the use of efficient cascade equations in the energy range where a shower can be treated as one-dimensional, with a traditional Monte Carlo method which traces individual particles. This allows one to reproduce natural fluctuations of individual showers as well as the lateral spread of low energy particles. The model is quite efficient in computation time. As an application of the new approach, the influence of the low energy hadronic models on shower properties for AUGER energies is studied. We conclude that these models have a significant impact on the tails of lateral distribution functions, and deserve therefore more attention.
The HADES experiment at GSI has recently provided data on the flow coefficients v1,..., v4 for protons in Au+Au reactions at Elab = 1.23 AGeV (or √sNN = 2.4 GeV). This data allows to estimate the shear viscosity over entropy density ratio, η/s at low energies via a coarse graining analysis of the UrQMD transport simulations of the flow harmonics in comparison to the experimental data. By this we can provide for the first time an estimate of η/s ≈ 0.65 ± 0.15 (or (8 ± 2)(4π)−1) at such low energies.
A micro-canonical treatment is used to study particle production in pp collisions. First this micro-canonical treatment is compared to some canonical ones. Then proton, antiproton and pion 4 pi multiplicities from proton-proton collisions at various center of mass energies are used to fix the micro-canonical parameters (E) and (V). The dependences of the micro-canonical parameters on the collision energy are parameterised for the further study of pp reactions with this micro-canonical treatment.
A study of secondary Drell-Yan production in nuclear collisions is presented for SPS energies. In addition to the lepton pairs produced in the initial collisions of the projectile and target nucleons, we consider the potentially high dilepton yield from hard valence antiquarks in produced mesons and antibaryons. We calculate the secondary Drell-Yan contributions taking the collision spectrum of hadrons from the microscopic model URQMD. The con- tributions from meson-baryon interactions, small in hadron-nucleus interac- tions, are found to be substantial in nucleus-nucleus collisions at low dilepton masses. Preresonance collisions of partons may further increase the yields.
A novel mechanism of H0 and strangelet production in hadronic interactions within the Gribov-Regge approach is presented. In contrast to traditional distillation approaches, here the production of multiple (strange) quark bags does not require large baryon densities or a QGP. The production cross section increases with center of mass energy. Rapidity and transverse momentum distributions of the H 0 are predicted for pp collisions at E_lab = 160 AGeV (SPS) and \sqrt s = 200 AGeV (RHIC). The predicted total H 0 multiplicities are of order of the Omega-baryon yield and can be accessed by the NA49 and the STAR experiments.
Relying on the existing estimates for the production cross sections of mini black holes in models with large extra dimensions, we review strategies for identifying those objects at collider experiments. We further consider a possible stable final state of such black holes and discuss their characteristic signatures. Keywords: Black holes
We introduce a transport approach which combines partonic and hadronic degrees of freedom on an equal footing and discuss the resulting reaction dynamics. The initial parton dynamics is modeled in the framework of the parton cascade model, hadronization is performed via a cluster hadronization model and configuration space coalescence, and the hadronic phase is described by a microscopic hadronic transport approach. The resulting reaction dynamics indicates a strong influence of hadronic rescattering on the space-time pattern of hadronic freeze-out and on the shape of transverse mass spectra. Freeze-out times and transverse radii increase by factors of 2 3 depending on the hadron species.
The transverse momentum dependence of the anisotropic flow v_2 for pi, K, nucleon, Lambda, Xi and Omega is studied for Au+Au collisions at sqrt s_NN = 200 GeV within two independent string-hadron transport approaches (RQMD and UrQMD). Although both models reach only 60% of the absolute magnitude of the measured v_2, they both predict the particle type dependence of v_2, as observed by the RHIC experiments: v_2 exhibits a hadron-mass hierarchy (HMH) in the low p_T region and a number-of-constituent-quark (NCQ) dependence in the intermediate p_T region. The failure of the hadronic models to reproduce the absolute magnitude of the observed v_2 indicates that transport calculations of heavy ion collisions at RHIC must incorporate interactions among quarks and gluons in the early, hot and dense phase. The presence of an NCQ scaling in the string-hadron model results suggests that the particle-type dependencies observed in heavy-ion collisions at intermediate p_T are related to the hadronic cross sections in vacuum rather than to the hadronization process itself, as suggested by quark recombination models.