14 research outputs found
Hosotani mechanism on the lattice
We explore the phase structure and symmetry breaking in four-dimensional
SU(3) gauge theory with one spatial compact dimension on the lattice in the
presence of fermions in the adjoint and fundamental representations with
general boundary conditions. The eigenvalue phases of Polyakov loops and the
associated susceptibility are measured on 16^3 x 4 lattice. We establish a
correspondence between the phases found on the lattice and the gauge symmetry
breaking by the Hosotani mechanism.Comment: 7 pages, 4 figures, prepared for the 31st International Symposium on
Lattice Field Theory - LATTICE 2013 Added preprint number
Scaling study of an improved fermion action on quenched lattices
We present scaling studies for heavy-quark observables calculated with an
-improved fermion action on tree-level Symanzik improved gauge
configurations. Lattices of 2.0-3.8 GeV with an equal physical volume
1.6 fm are used. The results are compared with the standard domain-wall and
naive Wilson fermions.Comment: 7 pages, 3 figures, presented at the 32nd International Symposium on
Lattice Field Theory, 23-28 June, 2014, Colombia University, New York, US
Two-photon decay of the neutral pion in lattice QCD
We perform non-perturbative calculation of the \pi^0 to {\gamma}{\gamma}
transition form factor and the associated decay width using lattice QCD. The
amplitude for two-photon final state, which is not an eigenstate of QCD, is
extracted through an Euclidean time integral of the relevant three-point
function. We utilize the all-to-all quark propagator technique to carry out
this integral as well as to include the disconnected quark diagram
contributions. The overlap fermion formulation is employed on the lattice to
ensure exact chiral symmetry on the lattice. After examining various sources of
systematic effects except for possible discretization effect, we obtain
\Gamma=7.83(31)(49) eV for the pion decay width, where the first error is
statistical and the second is our estimate of the systematic error.Comment: 5 pages, 4 figures. Changes made addressing to referee's comments,
version accepted by PR