b-quark electric dipole moment in the general two- and three-Higgs-doublet models

Iltan, EO
We study the electric dipole moment of a b-quark in the general two-Higgs-doublet model (model III) and three-Higgs-doublet model with O(2) symmetry in the Higgs sector. We analyse the dependence of this quantity on the new phase coming from the complex Yukawa couplings and masses of charged and neutral Higgs bosons. We see that the electric dipole moment of a b-quark is of the order of 10(-20) e cm, which is an extremely large value compared with that calculated in the standard model and also the two-Higgs-doublet model (model II) with real Yukawa couplings.


The effects of non-universal extra dimensions on the fermion electric dipole moments in the two Higgs doublet model
Iltan, EO (Springer Science and Business Media LLC, 2004-04-01)
We study the the effects of non-universal extra dimensions on the electric dipole moments of fermions in the two Higgs doublet model. We observe that the t quark and b quark electric dipole moments are sensitive to the extra dimensions, however, in the case of charged lepton electric dipole moments, this sensitivity is relatively weak.
B -> K*l(+)l(-) decay in the two Higgs doublet model with flavor changing neutral currents
Alıyev, Tahmasıb (Elsevier BV, 1999-04-01)
We study the decay width, forward-backward asymmetry and the longitudinal lepton polarization for the exclusive decay B --> K *l(+)l(-) in the two Higgs doublet model with three level flavor changing neutral currents (model III) and analyse the dependencies of these quantities on the the selected parameters, xi(U,D), of model III including the next to leading QCD corrections. It is found that to look for charged Higgs effects, the measurements of the branching ratio, forward-backward asymmetry and the longi...
ZL associated pair production of charged Higgs bosons in the littlest Higgs model at e(+)e(-) colliders
Cagil, A.; Zeyrek, Mehmet Tevfik (American Physical Society (APS), 2009-09-01)
The production of single and doubly charged Higgs bosons associated with standard model gauge boson Z(L) in e(+)e(-) colliders is examined. The sensitivity of these processes on the littlest Higgs model parameters in the range of compatibility with electroweak precision observables is analyzed. The possibility of detecting lepton flavor violation processes is also discussed.
B decays in an asymmetric left-right model
Frank, Mariana; Hayreter, Alper; Turan, İsmail (American Physical Society (APS), 2010-08-25)
Motivated by recently observed disagreements with the standard model predictions in B decays, we study b -> d, s transitions in an asymmetric class of SU(2)(L) x SU(2)(R) x U(1)(B-L) models, with a simple one-parameter structure of the right-handed mixing matrix for the quarks, which obeys the constraints from kaon physics. We use experimental constraints on the branching ratios of b -> s gamma, b -> ce (nu) over bar (e), and B-d,s(0) - (B) over barB(d,s)(0) mixing to restrict the parameters of the model: g...
Measurement and interpretation of differential cross sections for Higgs boson production at root s=13 TeV
Sirunyan, A. M.; et. al. (Elsevier BV, 2019-05-01)
Differential Higgs boson (H) production cross sections are sensitive probes for physics beyond the standard model. New physics may contribute in the gluon-gluon fusion loop, the dominant Higgs boson production mechanism at the LHC, and manifest itself through deviations from the distributions predicted by the standard model. Combined spectra for the H -> gamma gamma, H -> ZZ, and H -> b (b) over bar decay channels and the inclusive Higgs boson production cross section are presented, based on proton-proton c...
Citation Formats
E. Iltan, “b-quark electric dipole moment in the general two- and three-Higgs-doublet models,” JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, pp. 1723–1733, 2001, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/63866.