Consistency of models with CP violation predominantly in the ∆S = 1 Hamiltonian
Abstract
It is emphasized that models with small or vanishing CP violation in the ∆S = 2 ``superweak`` sector can be compatible with experiment provided there is ``direct'' ∆S = 1 CP violation and ``soft'' contribution of ∆M_{K}. Such models must possess the following special features: (1) ∊'/∊ negative and close to the experimental lower bound of 0.018 (2) a large negative ``soft'' contribution to ∆M_{K} such that ReM^{soft}_{12} <= 1.7 ReM^{exp}_{12}, consistent with some current algebra estimat es. The Higgsboson exchange model of Weinberg is an example of this class of model. The standard KM model can be another.
 Publication:

Physics Letters B
 Pub Date:
 November 1982
 DOI:
 10.1016/03702693(82)905780
 Bibcode:
 1982PhLB..117..441H