Cold Baryogenesis from first principles in the two-Higgs doublet model with fermions

Mou, Zong-Gang; Saffin, Paul M.; Tranberg, Anders

Abstract

We present a first-principles numerical computation of the baryon asymmetry in electroweak-scale baryogenesis. For the scenario of Cold Baryogenesis, we consider a one fermion-family reduced CP-violating two Higgs-doublet model, including a classical SU(2)-gauge/two-Higgs sector coupled to one quantum left-handed fermion doublet and two right-handed singlets. Separately, the C(CP) breaking of the two-Higgs potential and the C and P breaking of the gauge-fermion interactions do not provide a baryon asymmetry. Only when combined does baryogenesis occur. Through large-scale computer simulations, we compute the asymmetry for one particularly favourable scalar potential. The numerical signal is at the boundary of what is numerically discernible with the available computer resources, but we tentatively find an asymmetry of |η|≤3.5×10−7.

Citation

Mou, Z.-G., Saffin, P. M., & Tranberg, A. (2015). Cold Baryogenesis from first principles in the two-Higgs doublet model with fermions. Journal of High Energy Physics, 2015, https://doi.org/10.1007/JHEP06%282015%29163

• Journal Article Type: Article
• Acceptance Date: Jun 2, 2015
• Publication Date: Jun 24, 2015
• Deposit Date: Apr 25, 2017
• Publicly Available Date: Apr 25, 2017
• Journal: Journal of High Energy Physics
• Electronic ISSN: 1029-8479
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 2015
• DOI: https://doi.org/10.1007/JHEP06%282015%29163
• Keywords: Cosmology of Theories beyond the SM, Nonperturbative Effects, CP violation, Lattice Quantum Field Theory
• Public URL: https://nottingham-repository.worktribe.com/output/753810
• Publisher URL: https://link.springer.com/article/10.1007%2FJHEP06%282015%29163
• Contract Date: Apr 25, 2017