12 papers
Energy of the vacuum with a perfectly conducting and infinite cylindrical surface
P. Gosdzinsky, A. Romeo
Values for the vacuum energy of scalar fields under Dirichlet and Neuman boundary conditions on an infinite clylindrical surface are found, and they happen to be of opposite signs.…
Chiral Corrections to Vector Meson Decay Constants
Johan Bijnens, Peter Gosdzinsky, Pere Talavera
We calculate the leading quark mass corrections of order , and to the vector meson decay constants within Heavy Vector Meson Chiral Perturbation The…
Resummation of (-B(0) Alpha-s)**N Corrections to the Photon - Meson Transition Form-Factor Gamma* + Gamma ---> Pi0
P. Gosdzinsky, N. Kivel
We have resummed all the (-b_0 alpha_s)^n contributions to the photon-meson transition form factor F_{gamma pi}. To do this, we have used the assumption of `naive nonabelianization…
Vector Meson Masses in Chiral Perturbation Theory
J. Bijnens, P. Gosdzinsky, P. Talavera
We discuss the vector meson masses within the context of Chiral Perturbation Theory performing an expansion in terms of the momenta, quark masses and 1/Nc. We extend the previous a…
Electromagnetic Contributions to Vector Meson Masses and Mixings
J. Bijnens, P. Gosdzinsky
We use the 1/N_c method to estimate electromagnetic contributions to vector meson masses and mixings. We identify several new sources of rho-omega mixing coming from short-distance…
Chiral Perturbation Theory Predictions for
A. Bramon, P. Gosdzinsky, S. Tortosa
The decay is discussed in the general context of Chiral Perturbation Theory (ChPT), assuming that the low--energy constants (counter--terms) are saturated by v…