ELFT HÍRADÓ

[Somogyi Gábor <somogyi.gabor AT wigner.hu>]

Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk


                 Fabian Rennecke
                 (Giessen)


"Criticality in QCD"


    címmel tartandó szemináriumára.


Kivonat:



The conclusive observation of a second-order chiral phase transition in QCD 
has eluded both theory and experiment so far. We expect such a transition at 
lighter than physical quark masses and possibly also at finite density. In 
the vicinity of second-order phase transitions universal critical phenomena 
yield powerful constraints for the system. In addition, information about the 
phase structure is encoded in the analytic structure of thermodynamic 
quantities. I will discuss how this information can be leveraged to 
understand the QCD phase transition a bit better. Of central interest are 
branch points of the free energy, known as Yang-Lee edge singularities. They 
are in general located, e.g., at complex quark masses and chemical 
potentials, but pinch the real axes where second-order transitions occur. 
This information can be used to understand the nature of the critical mode in 
hot and dense QCD. I will also show how further analytic constraints on the 
location of the edge singularities in the complex plane can be exploited to 
learn about the dependence of the chiral phase transition on the quark masses.



Helye: Wigner FK RMI II. ép. Médiaterem (SZOKÁSOSTÓL ELTÉRŐ HELYSZÍN)
Ideje: 2023 november 21. kedd d.u. 14 óra (SZOKÁSOSTÓL ELTÉRŐ IDŐPONT)

Szívesen látunk minden érdeklődőt.


                            Somogyi Gábor