Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-06-12
Phys.Rev.Lett.97:131301,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages, 4 figures, typos corrected, references and acknowledgment added
Scientific paper
10.1103/PhysRevLett.97.131301
We present a new mechanism for generating the baryon asymmetry of the universe directly in the decay of a singlet scalar field $S_r$ with a weak scale mass and a high dimensional baryon number violating coupling. Unlike most currently popular models, this mechanism, which becomes effective after the electroweak phase transition, does not rely on the sphalerons for inducing a nonzero baryon number. CP asymmetry in $S_r$ decay arises through loop diagrams involving the exchange of $W^\pm$ gauge bosons, and is suppressed by light quark masses, leading naturally to a value of $\eta_B \sim 10^{-10}$. We show that the simplest realization of this mechanism, which uses a six quark $\Delta B=2$ operator, predicts colored scalars accessible to the LHC, and neutron--antineutron oscillation within reach of the next generation experiments.
Babu K. S.
Mohapatra Rabindra N.
Nasri Salah
No associations
LandOfFree
Post--Sphaleron Baryogenesis 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 Post--Sphaleron Baryogenesis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Post--Sphaleron Baryogenesis will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-647939