Outcome from spontaneousCPviolation forBdecays

Abstract

In the aspon model solution of the strong CP problem, there is a gauged U (1) symmetry, spontaneously broken by the same vacuum expectation value which breaks CP , whose massive gauge boson provides an additional mechanism of weak CP violation. We calculate the CP asymmetries in B decays for the aspon model and show that they are typically smaller than those predicted from the standard model. A linear relation between the CP asymmetries of different decay processes is obtained.Typeset using REVT E X 1

Cabibbo mixing and the search forCPviolation in the aspon model

“…An explicit examination of the several bracketed terms in (8) reveals that all are real except the first. The term m −1 δm yields a one-loop contribution toθ =θ u +θ d of order λx 2 /16π 2 , where λ is the real coefficient of the Higgs interaction λ|φ| 2 |χ| 2 .…”

“…In this paper, we explore CP -violation in the context of an 'Aspon model' [5][6][7][8] wherein the violation of CP is spontaneous. In particular, we add to the 3-family standard model a vector-like SU(2) doublet of quarks (U, D) L ⊕ (U, D) R together with two complex SU (2) singlet scalars χ 1,2 .…”

Kaon spontaneousCPviolation reevaluated

“…This model solves the strong CP problem and provides a mechanism for weak CP violation which can explain the parameter ǫ K in the kaon system [3]. It also predicts very small CP asymmetries in B 0 −B 0 decays [4] and production of exotic particles at the LHC [5].…”

SUFFICIENTLY SMALL $\bar\theta$inSU(3)3 × S3 UNIFICATION MODEL

“…Because of the observation of large CP asymmetries in decay of (B 0 ,B 0 ) at B Factories[1, 2] the option of soft CP violation [13,14,15] as solution of strong CP is disfavored though not excluded. Two popular alternative solutions, a massless up quark and an (invisible) axion have theoretical and empirical difficulties [5,6].…”