Abstract
We summarize our results on baryon number fluctuations at nonzero temperature and chemical potential. They are obtained from solutions of a coupled set of Dyson-Schwinger equations for the quark and gluon propagators of QCD in Landau gauge with Nf = 2 + 1 quark flavors. In comparison with preliminary STAR data, our results are compatible with a critical endpoint at large chemical potential and a freeze-out line that bends below it.
Highlights
Proving the very existence and possibly locating the theoretically conjectured critical endpoint (CEP) in the phase diagram of QCD is one of the main quests of contemporary heavy-ion collision experiments
In the following we summarize our recent results [4] on baryon number fluctuations at nonzero temperature T and baryon chemical potential μB as well as our updated result for the QCD phase diagram with Nf = 2 + 1 physical quark flavors using the nonperturbative framework of Dyson-Schwinger equations (DSEs)
The quark chemical potentials μf are related to the ones for baryon number, strangeness and electric charge via μu = μB /3 + 2μQ /3, μd = μB /3 − μQ /3, and μs = μB /3 − μQ /3 − μS
Summary
Proving the very existence and possibly locating the theoretically conjectured critical endpoint (CEP) in the phase diagram of QCD is one of the main quests of contemporary heavy-ion collision experiments. Assuming that the freeze-out happens close to the chiral crossover line, fluctuations of conserved charges (baryon number, strangeness, and electric charge) are expected to be promising quantities to provide signals of the CEP in experiments.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
