ELFT HÍRADÓ

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

Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk


                  Kovács Péter
                  (Wigner FK)


"Fate of the QCD critical endpoint at large N_c"


     címmel tartandó szemináriumára.


Kivonat:



The phase diagram of QCD is investigated by varying number of colors N_c 
within a Polyakov loop quark-meson chiral model. The first part of the 
talk is dedicated to the introduction of the basics of the large N_c 
technique. In the second part our attention is focused on the critical 
point(s). It turns out that the critical point present for N_c = 3 moves 
toward the µ_q-axis and disappears as soon as the number of color is 
increased. Yet, a distinct critical point emerges along the temperature 
axis for N_c = 53 and moves toward finite density when increasing N_c 
further. Thus, the phase diagram at large N_c looks like the opposite to 
the Nc = 3 results, with the first order transition in the upper-left 
and crossover in the down-right regions of the (µ_q,T)-plane. The 
pressure is also evaluated in dependence of N_c, showing a scaling with 
N_c^0  in the confined and chirally broken phase and with N_c^2 in the 
deconfined one. Moreover, the presence of a chirally symmetric but 
confined ‘quarkyonic phase’ at large density and moderate temperature 
with a pressure proportional to N_c is confirmed.



Helye: Wigner FK RMI III. ép. Tanácsterem
Ideje: 2022 október 21 péntek  d.u. 14 óra

Szívesen látunk minden érdeklődőt.


                             Somogyi Gábor