Implications of CP violating 2HDM in B physics

Abstract

The charged fermion mass matrices are invariant under U (1) 3 symmetry linked to the fermion number transformation. Under the condition that the definition of this symmetry in arbitrary weak basis does not depend upon Higgs parameters such as ratio of vacuum expectation values, a class of two Higgs doublet models (2HDM) can be identified in which tree level flavor changing neutral currents normally present in 2HDM are absent. However unlike the type I or type II Higgs doublet models, the charged Higgs couplings in these models contain additional flavor dependent CP violating phases. These phases can account for the recent hints of the beyond standard model CP violation in the B d and Bs mixing. In particular, there is a range of parameters in which new phases do not contribute to the K meson CP violation but give identical new physics phases in the B d and Bs meson mixing.

Fermion number conservation and two-Higgs-doublet models without tree-level flavor-changing neutral currents

“…At the quantitative level one can use the experimental observations to limit the allowed parameter space of the 2HDM of the type proposed here. This will be separately discussed [27].…”

“…Some other application of this scheme are discussed in [17,26]. We only discuss salient features here and defer a detailed discussion to a later publication [27]. The (F d ) ii and (F u ) ii entering the H + couplings are determined by the diagonal Yukawa couplings γ iq which also determine corresponding quark masses, see eq.…”

“…The box diagrams involving W H and HH lead to new physics contribution involving the charged Higgs H. The interaction in eq. ( 26) lead to the following effective Hamiltonian at the weak scale [27]:…”

“…where C 1,2 are the Wilson coefficients. Taking matrix element of the above equation and comparing with the SM result leads to [27] κ…”

Continuous Advances in QCD 2008

“…Refs. [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. TeVatron is continuing to take data and we will get more precise data from the upcomming experiments at LHC 43 or possibly at a SuperB-factory 44 running also at the Υ(5s)-resonance.…”