5 research outputs found
The finite temperature QCD phase transition with domain wall fermions
Results from the Columbia lattice group study of the QCD finite temperature
phase transition with dynamical domain wall fermions on
lattices are presented. These results include an investigation of the U(1)
axial symmetry breaking above but close to the transition, the use of zero
temperature calculations that set the scale at the transition and preliminary
measurements close to the transition.Comment: LATTICE99(hightemp), LaTeX, 3 pages, 3 eps figure
A Coupled-Cluster Formulation of Hamiltonian Lattice Field Theory: The Non-Linear Sigma Model
We apply the coupled cluster method (CCM) to the Hamiltonian version of the
latticised O(4) non-linear sigma model. The method, which was initially
developed for the accurate description of quantum many-body systems, gives rise
to two distinct approximation schemes. These approaches are compared with each
other as well as with some other Hamiltonian approaches. Our study of both the
ground state and collective excitations leads to indications of a possible
chiral phase transition as the lattice spacing is varied.Comment: 44 Pages, 14 figures. Uses Latex2e, graphicx, amstex and geometry
package
Spin 3/2 Baryons and Form Factors in AdS/QCD
We study the 5D Rarita-Schwinger fields to describe spin 3/2 baryons in
AdS/QCD. We calculate the spectrum of spin 3/2 baryons (Delta resonances) and
their form factors, together with meson-baryon couplings from AdS/QCD. The
transition form-factors between Delta and nucleon are evaluated. Both pion and
rho meson couplings have the same origin in the bulk and hence unified. The
numerical values for the meson-baryon transition couplings are consistent with
the values obtained from other methods. We also predict the numerical values of
some new couplings associated with Delta resonances.Comment: 29 pages, 6 figure