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19922026
Showing 2003 · hep-phShow all

7 papers · 2 filters

hep-ph2003★ 166 cited

Open-charm meson resonances with negative strangeness

J. Hofmann, M. F. M. Lutz

We study heavy-light meson resonances with quantum numbers J^P=0^+ and J^P=1^+ in terms of the non-linear chiral SU(3) Lagrangian. Adjusting the free parameters that arise at suble…

hep-ph2003★ 348 cited

On heavy-light meson resonances and chiral symmetry

E. E. Kolomeitsev, M. F. M. Lutz

We study heavy-light meson resonances with quantum numbers J^P=0^+ and J^P=1^+ in terms of the non-linear chiral SU(3) Lagrangian. At leading order a parameter-free prediction is o…

hep-ph2003★ 1 cited

Random phase approximation and its extension for the quantum O(2) anharmonic oscillator

Zoheir Aouissat, Cecile Martin

We apply the random phase approximation (RPA) and its extension called renormalized RPA to the quantum anharmonic oscillator with an O(2) symmetry. We first obtain the equation for…

hep-ph2003★ 76 cited

On charm baryon resonances and chiral symmetry

M. F. M. Lutz, E. E. Kolomeitsev

We study heavy-light baryon resonances with quantum numbers J^P=1/2^- in terms of the non-linear chiral SU(3) Lagrangian. Within the chi-BS(3) approach a parameter-free leading ord…

hep-ph2003★ 4 cited

Gauge checks, consistency of approximation schemes and numerical evaluation of realistic scattering amplitudes

Christian Schwinn

We discuss both theoretical tools to verify gauge invariance in numerical calculations of cross sections and the consistency of approximation schemes used in realistic calculations…

hep-ph2003★ 4 cited

Forests, Groves and Higgs Bosons: Gauge Invariance Classes in Spontaneously Broken Gauge Theories

T. Ohl, C. Schwinn

We determine the gauge invariance classes of tree level Feynman diagrams in spontaneously broken gauge theories, providing a proof for the formalism of gauge and flavor flips. We f…

hep-ph2003★ 152 cited

Flavor-Mixing Effects on the QCD Phase Diagram at non-vanishing Isospin Chemical Potential: One or Two Phase Transitions?

M. Frank, M. Buballa, M. Oertel

We investigate effects of a fixed nonzero isospin chemical potential on the mu_B-T phase diagram of strongly interacting matter using a Nambu--Jona-Lasinio-type four fermion intera…