Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2009-09-10
PoS LAT2009:184,2009
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 5 figures. Talk presented at Lattice 2009, Beijing, China. An expanded version was presented at XQCD 2009, Seoul, Sou
Scientific paper
We study QCD with two flavours of colour-sextet quarks as a candidate walking-Technicolor theory. We simulate lattice QCD with two flavours of colour-sextet staggered quarks at finite temperatures to observe the scales of confinement and chiral-symmetry breaking. These should give us some indication as to whether the massless theory has an infrared fixed point making it a conformal field theory, or whether it exhibits confinement and chiral symmetry breaking with a slowly varying coupling constant, i.e. `walks'. We find that unlike the case with fundamental quarks, the deconfinement and chiral-symmetry restoration transitions are far apart. The values of $\beta=6/g^2$ for both transitions increase when $Ta$ is decreased from 1/4 to 1/6 as would be expected for finite temperature transitions of an asymptotically-free field theory. So far we see no suggestion of conformal behaviour.
Kogut John B.
Sinclair D. K.
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