Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-08-18
Physics
High Energy Physics
High Energy Physics - Phenomenology
30 pages, 30 figures
Scientific paper
We present a Monte Carlo renormalisation group 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 taking this source of systematic error into account gives a much larger range of allowed values, -0.6 < gamma < 0.6. We also attempt to measure the anomalous mass dimension using the stability matrix method. We discuss the systematic errors affecting the current analysis and possible improvements.
Catterall Simon
Debbio Luigi Del
Giedt Joel
Keegan Liam
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