4,927 research outputs found
On free massless (pseudo)scalar quantum field theory in 1+1-dimensional space-time
We construct a consistent quantum field theory of a free massless
(pseudo)scalar field in 1+1-dimensional space-times free of infrared
divergences. We show that a continuous symmetry of (pseudo)scalar field
translations is spontaneously broken. Goldstone bosons appear as quanta of a
free massless (pseudo)scalar field. We show that the main inequality between
vacuum expectation values of certain operators which has been used for the
derivation of the Mermin-Wagner-Hohenberg theorem is fulfilled in the quantum
field theory of a free massless (pseudo)scalar field free of infrared
divergences.Comment: 20 pages, Latex, no figures, the manuscript is revised according to
the version accepted for publication in EPJ
Dynamics of low-energy nuclear forces for electromagnetic and weak reactions with the deuteron in the Nambu-Jona-Lasinio model of light nuclei
A dynamics of low-energy nuclear forces is investigated for low-energy
electromagnetic and weak nuclear reactions with the deuteron in the
Nambu-Jona-Lasinio model of light nuclei by example of the neutron-proton
radiative capture (M1-capture) n + p -> D + photon, the photomagnetic
disintegration of the deuteron photon + D -> n + p and weak reactions of
astrophysical interest. These are the solar proton burning p + p -> D +
positron + nu_e, the pep-process p + electron + p -> D + nu_e and the neutrino
and anti-neutrino disintegration of the deuteron caused by charged nu_e + D ->
electron + p + p, anti-nu_e + D -> positron + n + n and neutral nu_e(anti-nu_e)
+ D -> nu_e(ant-nu_e) + n + p weak currents.Comment: 49 pages, 3 Postscript figures, Latex. Eur. Phys. J. A8 (in press
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