Tuesday, February 14, 2012

1202.2675 (Thomas DeGrand et al.)

SU(4) lattice gauge theory with decuplet fermions: Schrödinger
functional analysis
   [PDF]

Thomas DeGrand, Yigal Shamir, Benjamin Svetitsky
We complete a program of study of SU(N) gauge theories coupled to two flavors
of fermions in the two-index symmetric representation by performing numerical
simulations in SU(4). The beta function, defined and calculated via the
Schr\"odinger functional, runs more slowly than the two-loop perturbative
result. The mass anomalous dimension levels off in strong coupling at a value
of about 0.45, rendering this theory unsuitable for walking technicolor. A
large-N comparison of this data with results from SU(2) and SU(3) reveals
striking regularities.
View original: http://arxiv.org/abs/1202.2675

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