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6 papers · 2 filters
Renormalization Group Flow Equations For The Scalar O(N) Theory
B. -J. Schaefer, O. Bohr, J. Wambach
Self-consistent new renormalization group flow equations for an O(N)-symmetric scalar theory are approximated in next-to-leading order of the derivative expansion. The Wilson-Fishe…
O'Mega & WHIZARD: Monte Carlo Event Generator Generation For Future Colliders
Thorsten Ohl
I describe the optimizing matrix element generator O'Mega and Wolfgang Kilian's event generator generator WHIZARD. These tools cooperate in the automated production of efficient un…
O'Mega: An Optimizing Matrix Element Generator
Thorsten Ohl
I sketch the architecture of O'Mega, a new optimizing compiler for tree amplitudes in quantum field theory. O'Mega generates the most efficient code currently available for scatter…
Meson loop effects in the NJL model at zero and non-zero temperature
M. Oertel, M. Buballa, J. Wambach
We compare two different possibilities to include meson-loop corrections in the Nambu-Jona-Lasinio model: a strict 1/N_c-expansion in next-to-leading order and a non-perturbative s…
Renormalization Group Flow Equations and the Phase Transition in O(N)-models
O. Bohr, B. -J. Schaefer, J. Wambach
We derive and solve flow equations for a general O(N)-symmetric effective potential including wavefunction renormalization corrections combined with a heat-kernel regularization. W…
Meson Properties in the 1/N_c-corrected NJL model
M. Oertel, M. Buballa, J. Wambach
Properties of mesons are investigated within the Nambu--Jona-Lasinio model. We include meson-loop corrections, which are generated via a systematic 1/N_c-expansion in next-to-leadi…