Projects per year
Abstract
Negative searches for permanent electric dipole moments (EDMs) heavily constrain models of baryogenesis utilising various higher dimensional charge and parity violating (CPV) operators. Using effective field theory, we create a model independent connection between these EDM constraints and the baryon asymmetry of the universe (BAU) produced during a strongly first order electroweak phase transition. The thermal aspects of the high scale physics driving the phase transition are paramaterised by the usual kink solution for the bubble wall profile. We find that operators involving derivatives of the Higgs field yield CPV contributions to the BAU containing derivatives of the Higgs vacuum expectation value (vev), while nonderivative operators lack such contributions. Consequently, derivative operators cannot be eliminated in terms of nonderivative operators (via the equations of motion) if one is agnostic to the new physics that leads to the phase transition. Thus, we reclassify the independent dimension six operators, restricting ourselves to third generation quarks, gauge bosons and the Higgs. Finally, we calculate the BAU (as a function of the bubble wall width and the cutoff) for a derivative and a nonderivative operator, and relate it to the EDM constraints.
Original language  English 

Article number  30 
Number of pages  23 
Journal  Journal of High Energy Physics 
Volume  2017 
Issue number  3 
DOIs  
Publication status  Published  1 Mar 2017 
Keywords
 Cosmology of Theories beyond the SM
 CP violation
 Effective field theories
 Thermal Field Theory
Projects
 1 Finished

ARC Centre of Excellence for Particle Physics at the TeraScale
Balazs, C., Barberio, E., Bell, N., Gherghetta, T., Limosani, A., Sevior, M., Taylor, G., Thomas, A., Varvell, K., Volkas, R., Williams, A. G., Yabsley, B., Young, R. D., Clarke, A., Jakobs, C., Kruse, M., Meroni, C., Parker, M. & Trodden, M.
Australian Research Council (ARC)
1/01/11 → 31/12/18
Project: Research