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Higher-loop structural properties of theβfunction in asymptotically free vectorial gauge theories
2013
Physical Review D
We investigate some higher-loop structural properties of the β function in asymptotically free vectorial gauge theories. Our main focus is on theories with fermion contents that lead to an infrared (IR) zero in β. We present analytic and numerical calculations of the value of the gauge coupling where β reaches a minimum, the value of β at this minimum, and the slope of β at the IR zero, at two-, three-, and four-loop order. The slope of β at the IR zero is relevant for estimates of a dilaton
doi:10.1103/physrevd.87.105005
fatcat:lmplfiddzvg7zc4ssovdl6mmle