Electroweak baryogenesis with primordial hypermagnetic fields

Details Electroweak baryogenesis with primordial hypermagnetic fields Electroweak baryogenesis with primordial hypermagnetic fields

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aipc..623..149a&link_type=abstract

AIP Conference Proceedings, vol. 623, iss. no. 1, p. 149-155

Physics

Baryons, Broken Symmetry, Charge Distribution, Cosmology, Electroweak Interactions (Field Theory), Elementary Particle Interactions, Evolution (Development), Higgs Bosons, Magnetic Fields, Phase Transformations, Standard Model (Particle Physics), Symmetry, Universe, Global Symmetries, Spontaneous And Radiative Symmetry Breaking, Particle-Theory And Field-Theory Models Of The Early Universe, Baryons

Scientific paper

Primordial magnetic fields, independently of their origin, could have had a significant influence over several physical processes that took place during the evolution of the early universe, in particular baryogenesis. Recall that for temperatures above the electroweak phase transition (T > 100 GeV), the symmetry of the standard model corresponded to the U(1)y hypercharge group, instead of the U(1)em electromagnetic group and are therefore properly called hypermagnetic fields. In this work, we show that during a first order electroweak phase transition, the presence of hypermagnetic fields produces an axial charge segregation in the reflection and transmission of fermions off the true vacuum bubbles. We also comment on the possible consequences that these processes have for the generation of baryon number during the phase transition.

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