142 citations · 640 across the 22 of their papers we have counts for
22 papers
Hydrodynamics at large baryon densities: Understanding proton vs. anti-proton v_2 and other puzzles
J. Steinheimer, V. Koch, M. Bleicher
We study the importance of the initial state, baryon stopping and baryon number transport for the dynamical evolution of a strongly interacting system produced in heavy ion collisi…
Facets of the QCD Phase-Diagram
V. Koch, A. Bzdak, J. Liao
In this contribution we will discuss two aspects of the matter created in ultra-relativistic heavy ion collisions. First we will attempt to define a universal measure for the fluid…
Study of the crossover transition of a gas of extended hadrons
L. Ferroni, V. Koch
We formulate a simple model for a gas of extended hadrons at zero chemical potential by taking inspiration from the compressible bag model. We show that a crossover transition qual…
Exposing the Noncollectivity in Elliptic Flow
Jinfeng Liao, Volker Koch
We show that backward-forward elliptic anisotropy correlation provides an experimentally accessible observable which distinguishes between collective and non-collective contributio…
Crossover transition in bag-like models
L. Ferroni, V. Koch
We formulate a simple model for a gas of extended hadrons at zero chemical potential by taking inspiration from the compressible bag model. We show that a crossover transition qual…
Charge fluctuations and electric mass in a hot meson gas
M. Doring, V. Koch
Net-Charge fluctuations in a hadron gas are studied using an effective hadronic interaction. The emphasis of this work is to investigate the corrections of hadronic interactions to…
Equilibrium in Heavy Ion Collisions
V. Koch, A. Majumder
We discuss the question of equilibriation in heavy ion collisions and how it can be addressed in experiment
The chemical equilibration volume: measuring the degree of thermalization
A. Majumder, V. Koch
We address the issue of the degree of equilibrium achieved in a high energy heavy-ion collision. Specifically, we explore the consequences of incomplete strangeness chemical equili…
Some remarks on the statistical model of heavy ion collisions
V. Koch
This contribution is an attempt to assess what can be learned from the remarkable success of the statistical model in describing ratios of particle abundances in ultra-relativistic…
Event-by-event fluctuations in heavy ion collisions
M. Doering, V. Koch
We discuss the physics underlying event-by-event fluctuations in relativistic heavy ion collisions. We will argue that the fluctuations of the ratio of positively over negatively c…
Chemical equilibration of U(1) charged particles in a thermal environment
K. Redlich, V. Koch, A. Tounsi
We discuss chemical equilibration of particles carrying non-vanishing quantum numbers related with U(1) internal symmetry. We construct the transport equation for the time evolutio…
Fluctuations of rare particles as a measure of chemical equilibration
S. Jeon, V. Koch, K. Redlich +1
We calculate the time evolution of fluctuations for rare particles such as e.g. kaons in 1 AGeV or charmonium in 200 AGeV heavy ion collisions. We find that these fluctuations are…
Event-by-event fluctuations of the charged particle ratio from non-equilibrium transport theory
M. Bleicher, S. Jeon, V. Koch
The event by event fluctuations of the ratio of positively to negatively charged hadrons are predicted within the UrQMD model. Corrections for finite acceptance and finite net char…
Medium Modified Cross Sections, Temperature and Finite Momentum Effects for Antikaon Production in Heavy-Ion Collisions
J. Schaffner-Bielich, V. Koch, M. Effenberger
The medium modifications of antikaons in dense matter are studied in a coupled channel calculation for scenarios more closely related to the environment encountered in heavy-ion co…
Production of Dileptons in Heavy Ion Collisions at SPS-Energies
V. Koch
In this contribution we will discuss the production of low mass dileptons in SPS-energy heavy ion collisions. We briefly review the current theoretical situation before we turn to…
Event by Event fluctuations and Inclusive Distribution
A. Bialas, V. Koch
Event-by-event observables are compared with conventional inclusive measurements. We find that moments of event-by-event fluctuations are closely related to inclusive correlation f…
Bremsstrahlung Dileptons in Ultra-relativistic Heavy Ion Collisions
J. Jalilian-Marian, V. Koch
We consider production of dilepton pairs through coherent electro-magnetic radiation during nuclear collisions. We show that the number of pairs produced through bremsstrahlung is…
Dilepton from Disoriented Chiral Condensates
V. Koch, J. Randrup, X. N. Wang +1
Disoriented chiral condensates are manifested as long wavelength pionic oscillations and their interaction with the thermal environment can be a significant source of dileptons. We…
Dileptons from Disoriented Chiral Condensates
Y. Kluger, V. Koch, J. Randrup +1
Disoriented chiral condensates or long wavelength pionic oscillations and their interaction with the thermal environment can be a significant source of dileptons. We calculate the…
Properties of Hadrons in the Nuclear Medium
C. M. Ko, V. Koch, G. Li
This review is devoted to the discussion of hadron properties in the nuclear medium and its relation to the partial restoration of chiral symmetry. Special attention is given to di…
Pion electromagnetic form factor at finite temperature
Chungsik Song, Volker Koch
Temperature effects on the electromagnetic couplings of pions in hot hadronic matter are studied with an effective chiral Lagrangian. We show that the Ward-Takahashi identity is sa…
Dilepton Production at SPS-energy Heavy Ion Collisions
V. Koch, C. Song
The production of dileptons is studied within a hadronic transport model. We investigate the sensitivity of the dilepton spectra to the initial configuration of the hadronic phase…