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126 papers · 1 filter
Photoproduction of the Lambda(1405) on the proton and nuclei
J. C. Nacher, E. Oset, H. Toki +1
We study the gamma p ---> K^+ Lambda(1405) reaction at energies close to threshold using a chiral unitary model where the resonance is generated dynamically from K^-p interaction w…
Further Comments on a Vanishing Singlet Axial Vector Charge
T. P. Cheng, N. I. Kochelev, V. Vento
The recent suggestion of a vanishing flavor-singlet axial charge of nucleon due to a nontrivial vacuum structure is further amplified. A perturbative QCD discussion, applicable for…
Effects of magnetohydrodynamics matter density fluctuations on the solar neutrino resonant spin-flavor precession
N. Reggiani, M. M. Guzzo, J. H. Colonia +1
Taking into account the stringent limits from helioseismology observations on possible matter density fluctuations described by magnetohydrodynamics theory, we find the correspondi…
Tau weak dipole moments from azimuthal asymmetries
J. Vidal, J. Bernabeu, G. Gonzalez-Sprinberg
We show that transverse and normal single- polarization of pairs produced at unpolarized collisions, at the peak, are sensitive to weak (magnetic and ele…
A family of complex potentials with real spectrum
F. M. Fernandez, R. Guardiola, J. Ros +1
We consider a two-parameter non hermitean quantum-mechanical hamiltonian that is invariant under the combined effects of parity and time reversal transformation. Numerical investig…
The Broad Line Radio Galaxy J2114+820
L. Lara, I. Marquez, W. D. Cotton +4
In the frame of the study of a new sample of large angular size radio galaxies selected from the NRAO VLA Sky Survey, we have made radio observations of J2114+820, a low power radi…