Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-09-01
Phys.Rev.D82:096008,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
RevTeX, 2colmuns, 6 pages and 7 figures
Scientific paper
10.1103/PhysRevD.82.096008
Some non perturbative aspects of the pure SU(3) Yang-Mills theory are investigated assuming a specific form of the beta function, based on a recent modification by Ryttov and Sannino of the known one for supersymmetric gauge theories. The characteristic feature is a pole at a particular value of the coupling constant, g. First it is noted, using dimensional analysis, that physical quantities behave smoothly as one travels from one side of the pole to the other. Then it is argued that the form of the integrated beta function g(m), where m is the mass scale, determines the mass gap of the theory. Assuming the usual QCD value one finds it to be 1.67 GeV, which is in surprisingly good agreement with a quenched lattice calculation. A similar calculation is made for the supersymmetric Yang-Mills theory where the corresponding beta function is considered to be exact.
Sannino Francesco
Schechter Joseph
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