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SUMMARY:Roberge-Weiss transition in Nf=2 QCD with staggered fermions and N
t=6
DTSTART;VALUE=DATE-TIME:20160725T160500Z
DTEND;VALUE=DATE-TIME:20160725T162500Z
DTSTAMP;VALUE=DATE-TIME:20200704T122050Z
UID:indico-contribution-2710@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Alessandro Sciarra (Goethe Universität)\nThe QCD ph
ase diagram at imaginary chemical potential exhibits a rich structure and
studying it\ncan constrain the phase diagram at real values of the chemica
l potential. Moreover\, at imaginary\nchemical potential standard numeric
techniques based on importance sampling can be applied\, since \nno sign p
roblem is present.\n\nIn the last decade\, a first understanding of the QC
D phase diagram at imaginary chemical potential\nhas been developed\, but
it is so far based on investigations on coarse lattices ($N_t=4\,\\\;a=0.3
$ fm).\nConsidering the $N_f=2$ case\, at the Roberge-Weiss critical value
of the imaginary chemical potential\,\nthe chiral/deconfinement transitio
n is first order for light/heavy quark masses\nand second order for interm
ediate values of the mass: there are then two tricritical masses\, whose\n
position strongly depends on the lattice spacing and on the discretisation
. On $N_t=4$\, we have the chiral \n$m_{\\pi}^{\\mbox{tric.}}\\simeq400$ M
eV with unimproved staggered fermions and $m_{\\pi}^{\\mbox{tric.}}\\simeq
900$ MeV with unimproved pure Wilson fermions.\n\nEmploying finite size sc
aling we investigate the change of this tricritical point between $N_t=4$
and $N_t=6$\nas well as between Wilson and staggered discretisations.\n\nh
ttps://conference.ippp.dur.ac.uk/event/470/contributions/2710/
LOCATION:Highfield Campus\, University of Southampton Building 32 Room 101
5
URL:https://conference.ippp.dur.ac.uk/event/470/contributions/2710/
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