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The topological susceptibility of the pure SU(3) Yang-Mills vacuum on the lattice
(1990)
Using a "field theoretic" approach, we compute the topological susceptibility χ of the pure gauge SU(3) theory on the lattice. We also apply an algorithm of gradual cooling, and use these two approaches as a cross-check ...
Two separated SU(2) Yang-Mills-Higgs monopoles in the Atiyah-Drinfeld- Hitchin-Manin-Nahm construction
(1982)
We study two arbitrarily separated SU(2) Yang-Mills-Higgs monopoles in the Atiyah-Drinfeld-Hitchin-Manin-Nahm (ADHMN) construction. In particular, we obtain an exact analytical expression for the Higgs field on the axis ...
Worldline path integral for the massive Dirac propagator: A four-dimensional approach
(1999)
We simplify and generalize an approach proposed by Di Vecchia and Ravndal to describe a massive Dirac particle in external vector and scalar fields. Two different path integral representations for the propagator are derived ...
Calculation of the decay width of decuplet baryons
(Proceedings of Science (PoS), 2015)
We calculate the coupling constant and decay width of the decuplet to octet baryon transitions in lattice QCD using the transfer matrix method. The transition amplitude is related to the coupling constant and via the Fermi's ...
Colloquium: The shape of hadrons
(2012)
This Colloquium addresses the issue of the shape of hadrons and, in particular, that of the proton. The concept of shape in the microcosm is critically examined. Special attention is devoted to properly define the meaning ...
Study of decuplet baryon resonances from lattice QCD
(2016)
A lattice QCD study of the strong decay width and coupling constant of decuplet baryons to an octet baryon-pion state is presented. The transfer matrix method is used to obtain the overlap of lattice states with decuplet ...
λ-parameter of lattice QCD with the overlap-Dirac operator
(2000)
We compute the ratio ΛL/Λ/MS between the scale parameter ΛL, associated with a lattice formulation of QCD using the overlap-Dirac operator, and Λ/MS of the MS renormalization scheme. To this end, the necessary one-loop ...
Determination of Δ-resonance parameters from lattice QCD
(2013)
A method suitable for extracting resonance parameters of unstable baryons in lattice QCD is examined. The method is applied to the strong decay of the Δ to a pion-nucleon state, extracting the πNΔ coupling constant and Δ ...
Stochastic solution to highly nonlocal actions: the polaron problem
(1992)
A stochastic technique for highly nonlocal actions has been developed and applied to the Fröhlich Hamiltonian describing an optical polaron. The energy and the effective mass of the polaron are obtained for a wide range ...
Preface
(2006)