24-30 July 2016
Highfield Campus, University of Southampton
Europe/London timezone

The chiral phase transition from non-integer flavour numbers with staggered fermions

25 Jul 2016, 17:25
20m
Building 32 Room 1015 (Highfield Campus, University of Southampton)

Building 32 Room 1015

Highfield Campus, University of Southampton

Talk Nonzero Temperature and Density Nonzero Temperature and Density

Speaker

Ms Francesca Cuteri (Goethe University - Frankfurt)

Description

The attempt at clarifying the order of the thermal transition in the chiral limit of QCD at zero chemical potential, with two dynamical flavours of quarks, by progressively decreasing the simulated pion mass has proven to be inconclusive because of the increasing costs of the simulations as the pion mass is lowered. An alternative way to approach this question is to consider the path integral as a function of continuous Nf . If the transition is first order for Nf ≳ 3 , a second order transition for Nf = 2 requires a tricritical point in between. The simulation of non-integer numbers of fermion flavours is easily achievable within the staggered fermion discretization. First simulations at μ = 0 and Nf = 2.8, 2.6, 2.4, 2.2 , on coarse Nτ = 4 lattices, show a continuous variation of the critical mass mapping out a critical line in the m − Nf plane.

Primary author

Ms Francesca Cuteri (Goethe University - Frankfurt)

Co-authors

Mr Alessandro Sciarra (Goethe Universität) Prof. Owe Philipsen (Goethe University - Frankfurt)

Presentation Materials