RBRC Seminar

"The QCD chiral phase transition for different numbers of flavours"

Presented by Owe Philipsen

Thursday, April 14, 2022, 9:30 am — Videoconference / Virtual Event (see link below)

Abstract: The nature of the thermal QCD transition is known to be an analytic crossover, rather than a non-analytic phase transition. However, because of the small light quark masses, it is also necessary to understand the nature of the chiral phase transition in the massless limit, which cannot be simulated directly on the lattice. On the one hand, a possible second-order chiral transition is believed to influence the physical point via its scaling region, on the other hand the nature of the chiral transition also constrains the possibilities for the QCD phase diagram at finite baryon density.

I report recent lattice results, which resolve apparent contradictions between different lattice discretisations and suggest a final, non-perturbative answer to this longstanding open problem. Contrary to the famous Pisarski-Wilczek prediction from 1984, we find the chiral phase transition to be second order for all Nf

Hosted by: Vladi Skokov

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