The simpler natural bases / by George Barger.

Using recent experimental measurements on Br(b ..... sr) from CLEO, we study the constraints on the charged Higgs sector in various three-Higgs-doublet models. Some phenomenological implications in these models with emphasis on CP violation are presented. In particular, in some of these models; the CP violating muon polarization in Kp3 can be detected using the current KEK experiment E246. § 1. IntroductionThe Standard Model (SM) of electroweak interaction has to this point agreed with all current experimental data. However, the Higgs sector is still elusive and there exists very little experimental information on its nature. An enlarged Higgs sector beyond the SM is possibly consistent with the data and has received substantial attention in the literature. The simplest extensions are models with two Higgs doublets which have been discussed extensively by many authors.l)In this article, we wish to concentrate on models with three Higgs doublets, such as the original Weinberg three-Higgs-doublet model (WTHDM)2) or its variations. One significant characteristic of THDMs is that they contain a new CP-violating mechanism,3) in which the CP-violating phase comes from the mixing between physical and unphysical charged Higgs particles, in addition to the possibility of spontaneous CP violation (SCPV)4) in which the CP violation is from the mixing between CP odd and CP even neutral particles and the usual Cabibbo-Kobayashi-Maskawa (CKM) mechanism,S) which is explicitly broken CP symmetry. This new phase may have significant effects not only on the kaon system but also on the B-B mixing, on the CP asymmetries in B decays, on Weinberg's six dimensional operator which contributes to large neutron electric dipole moment (NEDM) and on B~ Tar or B~ KK through penguin diagrams depending on the models, as emphasized in Ref. 6). However, since the CP-violating couplings also contribute to other processes including the CP-conserving B decays, the experimental data on the radiative decay B-+ X s r7) can also constrain the CP asymmetries in B decays in these models to be small,6) assuming there is no cancellation between different sources of contributions. In addition, in some variations of WTHDM, the charged Higgs exchange mechanism can contribute to processes that involve both quarks and leptons, such as the semileptonic B decays of B-+ XlvI and the CP-violating muon polarization in KP.3, and give contributions near the current experimental data. This paper is organized as follows. In § 2, we present various types of Weinberg three-Higgs-doublet models and their constraints. Some phenomenological consequences are discussed in § 3. We give our concluding remarks in § 4.

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“…(19) derived from the limits b----+sr is compatible with that from the B-13 mixing given in Eq. (11).…”

Section: Fl(x) 12(i-=-x)4 [(7-5x-8x2)(i-x)+x(12-18x)lnx]mentioning

confidence: 95%

“…Thus, from Eqs. (11) and (12), we find (13) For Model II, the direct bounds on Im(xy*) from the experimental limit on the EDM of the neutron are given by IIm(xy*)1 < 20 <100 for MH~200GeV.…”

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confidence: 97%

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Implications of b ->s in the Weinberg Three-Higgs-Doublet Models

Chang

Chen

Geng

1996

Progress of Theoretical Physics

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“…(3 · 31) that the sign of A 3 is opposite to that of F 3 • Unfortunately the general positivity argument does not set up any restriction on the sign of F 3 • 60 ) It is, however, ,easy to show that F 3 is negative definite in the valence-sea quark-parton model. 48 ) This is supported by phenom~nological analyses of 'neutrino data. 25 ) We here assume that A 3 >3.…”

Section: )' 59 )mentioning

confidence: 99%

Models of Bjorken Scaling Violation

Matumoto

Muta

Tajima

2013

Progress of Theoretical Physics Supplement

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Two models of the Bjorken scaling violation-quarks with substructure and new scaling rule-.are presented and discussed. The characteristic patterns of. the scaling violations resulting from the model are given. The models are tested in electro'-and muo-production data. With the models tested in electroand muo-productions we derive several consequences of them on charged current neutrino reactions .and large-Pr n°"spectra in proton-proton c~lli;ions.

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“…Mikheyev and Smirnov 3 ) have pointed out that flavor oscillation could be greatly enhanced by the high density of electrons in the sun, which couple to the neutrino through the charged-current weak interactions. By this mechanism, the electron neutrino can be highly suppressed_ Many authors 4 ), 5) have calculated this matterenhancement of oscillation by means of coupled differential equations, and of semianalytic treatments.…”

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confidence: 99%