Bound-state beta decay of a neutron in a strong magnetic fieldстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The beta decay of a neutron into a bound (pe(-)) state and an antineutrino in the presence of a strong uniform magnetic field (B greater than or similar to 10(13) G) is considered. The beta decay process is treated within the framework of the standard model of weak interactions. A Bethe-Salpeter formalism is employed for description of the bound (pe(-)) system in a strong magnetic field. For the field strengths 10(13)less than or similar to B less than or similar to 10(18) G the estimate for the ratio of the bound-state decay rate w(b) and the usual (continuum-state) decay rate w(c) is derived. It is found that in such strong magnetic fields w(b)/w(c)similar to 0.1-0.4. This is in contrast to the field-free case, where w(b)/w(c)similar or equal to 4.2x10(-6) [J. N. Bahcall, Phys. Rev. 124, 495 (1961); L. L. Nemenov, Sov. J. Nucl. Phys. 15, 582 (1972); X. Song, J. Phys. G: Nucl. Phys. 13, 1023 (1987)]. The dependence of the ratio w(b)/w(c) on the magnetic field strength B exhibits a logarithmiclike behavior. The obtained results can be important for applications in astrophysics and cosmology.