Chiral phase transition of (2+1)-flavor QCD

We present here results on the determination of the critical temperature in the chiral limit for (2+1)-flavor QCD. We propose two novel estimators of the chiral critical temperature where quark mass dependence is strongly suppressed compared to the conventional estimator using pseudo-critical temper...

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Bibliographic Details
Published in:Nuclear physics. A 2019-02, Vol.982, p.211-214
Main Authors: Ding, H.-T., Hegde, P., Karsch, F., Lahiri, A., Li, S.-T., Mukherjee, S., Petreczky, P.
Format: Article
Language:English
Subjects:
chiral symmetry
critical point
Lattice QCD
phase transition
universality class
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Summary:We present here results on the determination of the critical temperature in the chiral limit for (2+1)-flavor QCD. We propose two novel estimators of the chiral critical temperature where quark mass dependence is strongly suppressed compared to the conventional estimator using pseudo-critical temperatures. We have used the HISQ/tree action for the numerical simulation with lattices with three different temporal extent Nτ = 6, 8, 12 and varied the aspect ratio over the range 4≤Nσ/Nτ≤8. To approach the chiral limit, the light quark mass has been decreased keeping the strange quark mass fixed at its physical value. Our simulations correspond to the range of pion masses, 55MeV≤mπ≤160MeV.
ISSN:0375-9474
DOI:10.1016/j.nuclphysa.2018.10.032