Baryon asymmetry of the universe. A Monte Carlo study on the lattice

Details Baryon asymmetry of the universe. A Monte Carlo study on the lattice Baryon asymmetry of the universe. A Monte Carlo study on the lattice

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phlb..197...49a&link_type=abstract

Physics Letters B, Volume 197, Issue 1-2, p. 49-54.

Physics

40

Scientific paper

We initiate the lattice investigation of the bayron asymmetry generation within the framework of the standard electroweak theory. We find that transitions between different gauge sectors are unsuppressed at temperatures larger than the critical temperature corresponding to the breaking of the electroweak SU (2) × U (1) group. The Monte Carlo data suggest that the high-temperature plasma is populated with gauge-Higgs fluctuations, which produce a change of the Chern-Simons number of +/-1 during the transition, thereby creating 12 fermions due to the electroweak anomaly. If there is a Bose-Einstein condensation of these fluctuations our results indicate that the baryon asymmetry produced during the phase transition could be as large as 10-6.
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