4,185 research outputs found
Pion Mass Modification in presence of external magnetic field
In this work, the self energies of and up to one loop
order have been calculated in the limit of weak external magnetic field. The
effective masses are explicitly dependent on the magnetic field which are
modified significantly for the pseudoscalar coupling due to weak field
approximation of the external field. On the other hand, for the pseudovector
coupling, there is a modest increment in the effective masses of the pions.
These theoretical developments are relevant for the study of the
phenomenological aspect of mesons in the context of neutron stars as well as
heavy ion collisions.Comment: Published in conference proceedings of DAE-HEP-2016 (XXII DAE High
Energy Physics Symposium, New Delhi, India
Variation of Hilbert Coefficients
For a Noetherian local ring (\RR, \m), the first two Hilbert coefficients,
and , of the -adic filtration of an \m-primary ideal are
known to code for properties of \RR, of the blowup of \spec(\RR) along
, and even of their normalizations. We give estimations for these
coefficients when is enlarged (in the case of in the same integral
closure class) for general Noetherian local rings
Modification of the masses of the lightest neutral mesons in a hadronic medium under an external magnetic field
The effective masses of the neutral mesons in a hadronic medium and under an external magnetic field are evaluated as functions of the baryonic density and the field intensity. For this purpose, the meson polarization is evaluated in the one-loop approximation using a quantum hadrodynamics model which includes π, σ, ω, and ρ mesons. The propagators of the baryons include the full effect of the coupling to the magnetic field through their charges and their anomalous magnetic moments. Within the range of magnetic intensities considered here 1017 GFil: Aguirre, Ricardo Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Física; Argentin
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