Systematic Errors of the MCRG Method

Details Systematic Errors of the MCRG Method Systematic Errors of the MCRG Method

2011-10-07

arxiv.org/abs/1110.1660v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 3 figures, presented at XXIX International Symposium on Lattice Field Theory, July 10-16, 2011, Squaw Valley, Califor

Scientific paper

We present a Monte Carlo Renormalisation Group (MCRG) study of the SU(2) gauge theory with two Dirac fermions in the adjoint representation. Using the two-lattice matching technique we measure the running of the coupling and the anomalous mass dimension. We find slow running of the coupling, compatible with an infrared fixed point. Assuming this running is negligible we find a vanishing anomalous dimension, gamma=-0.03(13), however without this assumption our uncertainty in the running of the coupling leads to a much larger range of allowed values, -0.6 < gamma < 0.6. We discuss the systematic errors affecting the current analysis and possible improvements.

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