The Standard Model in Strong Fields: Electroweak Radiative Corrections for Highly Charged Ions
نویسندگان
چکیده
Electroweak radiative corrections to the matrix elements 〈ns1/2|ĤPNC|n′p1/2〉 are calculated for highly charged hydrogenlike ions. These matrix elements constitute the basis for the description of the most parity nonconserving (PNC) processes in atomic physics. The operator ĤPNC represents the parity nonconserving relativistic effective atomic Hamiltonian at the tree level. The deviation of these calculations from the calculations valid for the momentum transfer q2 = 0 demonstrates the effect of the strong field, characterized by the momentum transfer q2 = me (me is the electron mass). This allows for a test of the Standard Model in the presence of strong fields in experiments with highly charged ions.
منابع مشابه
Electroweak corrections to decays involving a charged Higgs boson.
We present complete one-loop radiative corrections to the decay rate of a top quark into a charged Higgs boson and a bottom quark, and for the decay of a charged Higgs boson into leptons. The results are discussed in the framework of the two Higgs boson extension of the Standard Model suggested by supersymmetry. The effect of electroweak corrections after exclusion of universal corrections ∆r i...
متن کاملThirring’s low-energy theorem and its generalizations in the electroweak Standard Model
The radiative corrections to Compton scattering vanish in the low-energy limit in all orders of perturbation theory. This theorem, which is well-known for Abelian gauge theories, is proved in the electroweak Standard Model. Moreover, analogous theorems are derived for photon scattering off other charged particles, in particular W bosons. Since the theorems follow from gauge invariance and on-sh...
متن کاملRadiative Corrections to Top Quark Decay into Charged Higgs at the Tevatron
We present the computation of the leading one-loop electroweak radiative corrections to the non-standard top quark decay width Γ(t → H b), using a physically motivated definition of tanβ. We find that the corrections are large, both in the Minimal Supersymmetric Standard Model (MSSM) and the Two-Higgs-Doublet Model (2HDM). These corrections have an important effect on the interpretation of the ...
متن کاملNatural electroweak breaking from a mirror symmetry.
We present "twin Higgs models," simple realizations of the Higgs boson as a pseudo Goldstone boson that protect the weak scale from radiative corrections up to scales of order 5-10 TeV. In the ultraviolet these theories have a discrete symmetry which interchanges each standard model particle with a corresponding particle which transforms under a twin or a mirror standard model gauge group. In a...
متن کاملHiggsless Theory of Electroweak Symmetry Breaking from Warped Space
We study a theory of electroweak symmetry breaking without a Higgs boson. The theory is formulated in 5D warped space with the gauge bosons and matter fields propagating in the bulk. In the 4D dual picture, the theory appears as the standard model without a Higgs field, but with an extra gauge group G which becomes strong at the TeV scale. The strong dynamics of G breaks the electroweak symmetr...
متن کامل