8 papers
First order transition region of an equation of state for QCD with a critical point
Jamie M. Karthein, Volker Koch, Claudia Ratti
In addition to signals for the critical point, evidence for a first order phase transition would indicate a nontrivial structure within the QCD phase diagram. Moreover, while not a…
To bin or not to bin: does binning in multiplicity reliably suppress unwanted volume fluctuations?
Bengt Friman, Volker Koch
In this study, we examine the effect of the so-called Centrality Bin Width Correction (CBWC) on the measurement of (net-)proton number cumulants in nucleus-nucleus collisions. We p…
Probing QGP using local charge fluctuations in heavy-ion collisions
Jonathan Parra, Roman Poberezhniuk, Volker Koch +2
We revisit the D-measure of event-by-event net-electric charge fluctuations, an idea first introduced over 20 years ago as a potential signature for the presence of quark-gluon pla…
Particle Correlations in Jets
Wenbin Zhao, Volker Koch, Feng Yuan
We study particle correlations in high energy jets by comparing the measured energy-energy correlator (EEC) with that constructed from two individual energy flows with respect to t…
Indications for freeze-out of charge fluctuations in the quark-gluon plasma at the LHC
Jonathan Parra, Roman Poberezhniuk, Volker Koch +2
The D-measure of net-charge fluctuations quantifies the variance of net charge in strongly interacting matter. It was introduced over 20 years ago as a potential signal of quark-gl…
Description of the first order phase transition region of an equation of state for QCD with a critical point
Jamie M. Karthein, Volker Koch, Claudia Ratti
We map the mean-field Ising model equation of state onto the QCD phase diagram, and reconstruct the full coexistence region in the case of a first order phase transition. Beyond th…
Controlling volume fluctuations for studies of critical phenomena in nuclear collisions
Romain Holzmann, Volker Koch, Anar Rustamov +1
We generalize and extend the recently proposed method to account for contributions of system size (or volume/participant) fluctuations to the experimentally measured moments of par…
Interplay of baryonic chiral partners in fluctuations of net-baryon number density
Michał Marczenko, Volker Koch, Krzysztof Redlich +1
In this contribution, we use the parity doublet model to investigate the fluctuations of the net-baryon number density. We discuss the systematics of the susceptibilities and their…