TY  - JOUR
A1  - Cuteri, Francesca
A1  - Philipsen, Owe
A1  - Schön, Alena
A1  - Sciarra, Alessandro
T1  - Deconfinement critical point of lattice QCD with Nf=2 Wilson fermions
T2  - Physical Review D
N2  - The SU(3) pure gauge theory exhibits a first-order thermal deconfinement transition due to spontaneous breaking of its global Z3 center symmetry. When heavy dynamical quarks are added, this symmetry is broken explicitly and the transition weakens with decreasing quark mass until it disappears at a critical point. We compute the critical hopping parameter and the associated pion mass for lattice QCD with Nf=2 degenerate standard Wilson fermions on Nτ∈{6,8,10} lattices, corresponding to lattice spacings a=0.12  fm, a=0.09  fm, a=0.07  fm, respectively. Significant cutoff effects are observed, with the first-order region growing as the lattice gets finer. While current lattices are still too coarse for a continuum extrapolation, we estimate mcπ≈4  GeV with a remaining systematic error of ∼20%. Our results allow us to assess the accuracy of the leading-order and next-to-leading-order hopping expanded fermion determinant used in the literature for various purposes. We also provide a detailed investigation of the statistics required for this type of calculation, which is useful for similar investigations of the chiral transition.
KW  - Lattice gauge theory
KW  - Hybrid Monte Carlo algorithm
Y1  - 2021
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/62281
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-622810
SN  - 2470-0029
N1  - Funded by SCOAP3.
N1  - The authors acknowledge support by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the CRC-TR 211 “Strong-interaction matter under extreme conditions” – Project No. 315477589 –
TRR 211.
VL  - 103
IS  - 1, art. 014513
SP  - 1
EP  - 12
PB  - Inst.
CY  - Woodbury, NY
ER  -