CP violation for electroweak baryogenesis from mixing of standard model and heavy vector quarks

Details CP violation for electroweak baryogenesis from mixing of standard model and heavy vector quarks CP violation for electroweak baryogenesis from mixing of standard model and heavy vector quarks

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996phrvd..53..645m&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 53, Issue 2, 15 January 1996, pp.645-654

Other

6

Particle-Theory And Field-Theory Models Of The Early Universe, Spontaneous Breaking Of Gauge Symmetries, Charge Conjugation, Parity, Time Reversal, And Other Discrete Symmetries, Quark And Lepton Masses And Mixing

Scientific paper

It is known that the CP violation in the minimal standard model is insufficient to explain the observed baryon asymmetry of the Universe in the context electroweak baryogenesis. In this paper we consider the possibility that the additional CP violation required could originate in the mixing of the standard model quarks and heavy vector quark pairs. We consider the baryon asymmetry in the context of the spontaneous baryogenesis scenario. It is shown that, in general, the CP-violating phase entering the mass matrix of the standard model and heavy vector quarks must be space dependent in order to produce a baryon asymmetry, suggesting that the additional CP violation must be spontaneous in nature. This is true for the case of the simplest models which mix the standard model and heavy vector quarks. We derive a charge potential term for the model by diagonalizing the quark mass matrix in the presence of the electroweak bubble wall, which turns out to be quite different from the fermionic hypercharge potentials usually considered in spontaneous baryogenesis models, and obtain the rate of baryon number generation within the wall. We find, for the particular example where the standard model quarks mix with weak-isodoublet heavy vector quarks via the expectation value of a gauge singlet scalar, that we can account for the observed baryon asymmetry with conservative estimates for the uncertain parameters of electroweak baryogenesis, provided that the heavy vector quarks are not heavier than a few hundred GeV and that the coupling of the standard model quarks to the heavy vector quarks and gauge singlet scalars is not much smaller than order of 1, corresponding to a mixing angle of the heavy vector quarks and standard model quarks not much smaller than order of 10-1.

Affiliated with

Also associated with

No associations

Rating

CP violation for electroweak baryogenesis from mixing of standard model and heavy vector quarks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with CP violation for electroweak baryogenesis from mixing of standard model and heavy vector quarks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CP violation for electroweak baryogenesis from mixing of standard model and heavy vector quarks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1129674