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13 papers · 2 filters
Determination of m_s and |V_us| from hadronic tau decays
E. Gamiz, M. Jamin, A. Pich +2
The mass of the strange quark is determined from SU(3)-breaking effects in the tau hadronic width. Compared to previous analyses, the contributions from scalar and pseudoscalar spe…
A New 5-Flavour LO Analysis and Parametrization of Parton Distributions in the Real Photon
F. Cornet, P. Jankowski, M. Krawczyk +1
New, radiatively generated, LO quark (u,d,s,c,b) and gluon densities in a real, unpolarized photon are presented. We perform a global 3-parameter fit, based on LO DGLAP evolution e…
Lepton Flavour Violating Z Decays in the MSSM
Jose I. Illana
The possibility to observe lepton flavour violating Z decays in the GigaZ option of DESY's TESLA project consistently with present bounds from other processes is analyzed in the co…
Cosmic Rays and New Physics at the TeV: the Neutrino-Nucleon Cross Section
M. Masip
Ultrahigh energy neutrinos can be used to explore the physics at the TeV scale. We study the neutrino-nucleon cross section in models with extra dimensions and the fundamental scal…
Meson-Baryon Unitarized Coupled Channel Chiral Perturbation Theory and the (1405) and (1670) Resonances
C. Garcia-Recio, J. Nieves, E. Ruiz Arriola +1
The wave meson-baryon scattering is analyzed for the strangeness and isospin I=0 sector in a Bethe-Salpeter coupled channel formalism incorporating Chiral Symmetry. Four…
Pion Structure at High and Low Energies in Chiral Quark Models
E. Ruiz Arriola
Low and high energy properties of the pion are reviewed in the framework of chiral quark models. Particular emphasis is put on the simplest version of the SU(2) NJL model as protot…