Critical or tricritical point in mixed-action SU(2) lattice gauge theory?

Details Critical or tricritical point in mixed-action SU(2) lattice gauge theory? Critical or tricritical point in mixed-action SU(2) lattice gauge theory?

2004-04-20

arxiv.org/abs/hep-lat/0404015v2

Nucl.Phys. B713 (2005) 204-218

Physics

High Energy Physics

High Energy Physics - Lattice

20 pages, LaTex, 9 figures. Several arguments strengthed, new fits added to Fig. 6, typos corrected

Scientific paper

10.1016/j.nuclphysb.2005.02.018

An analysis of scaling along the first-order bulk transition line in fundamental-adjoint SU(2) lattice gauge theory strongly supports the first-order endpoint being a tricritical point, and is inconsistent with it being an ordinary critical point as is usually assumed. If tricritical, the transition must continue from the endpoint further into the phase diagram as a second-order bulk transition and extend to and beyond the Wilson axis. Observations indicate that this is most likely the same transition that has been traditionally considered a finite-temperature transition.

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