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11 papers · 1 filter
The effective potential and the renormalisation group
C. Ford, D. R. T. Jones, P. W. Stephenson +1
We discuss renormalisation group improvement of the effective potential both in general and in the context of scalar $\p^4$ and the Standard Model. In the latter case we fin…
Characters for Coset Conformal Field Theories
David C. Dunbar, Keith G. Joshi
We solve the Kac-Moody branching equation to obtain explicit formulae for the characters of coset conformal field theories and then apply these to specific examples to determine th…
Multi-quark energies in QCD
A. M. Green, C. Michael, J. E. Paton
Four-quark potentials for are evaluated in the static limit with the quenched approximation -- using a lattice of and . The four quarks are restricte…
The Running Coupling from SU(3) Lattice Gauge Theory
The UKQCD Collaboration, S. P. Booth, D. S. Henty +4
{}From an accurate determination of the inter-quark potential, one can study the running coupling constant for a range of -values and hence estimate the scale $Λ_{\msbar} $. Det…
SU(2) Potentials from Large Lattices
The UKQCD Collaboration, S. P. Booth, A. Hulsebos +5
We measure accurate values of the inter-quark potentials on a lattice with SU(2) pure gauge theory at . The scale is set by extracting the string tension - we o…
The Hyperfine Splitting in Charmonium: Lattice Computations Using the Wilson and Clover Fermion Actions
UKQCD Collaboration, C. R. Allton, C. T. Sachrajda +10
We compute the hyperfine splitting on the lattice, using both the Wilson and -improved (clover) actions for quenched quarks. The computations are performed…