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Scaling behaviour at the $N_t=6$ chiral phase transition for 2-flavour lattice QCD with massless staggered quarks, and an irrelevant 4-fermion interaction | | J. B. Kogut
; D. K. Sinclair
; | | Date: |
18 Apr 2001 | | Journal: | Phys.Rev. D64 (2001) 034508 | | Subject: | hep-lat | | Affiliation: | University of Illinois), D. K. Sinclair (Argonne National Laboratory | | Abstract: | We have simulated lattice QCD with 2 flavours of massless staggered quarks. An irrelevant chiral 4-fermion interaction was added to the standard quark action to allow us to simulate at zero quark mass. Thermodynamics was studied on lattices of temporal extent 6. Clear evidence for a second order chiral transition was observed and the critical exponents $eta_{mag}$, $delta$, $
u$ and $gamma_{mag}$ were measured. These exponents did not agree with those expected by standard universality arguments. They were, however, consistent with tricritical behaviour. The $pi$ and $sigma$ screening masses were measured and showed clear evidence for chiral symmetry restoration at this transition. | | Source: | arXiv, hep-lat/0104011 | | Services: | Forum | Review | PDF | Favorites | |
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