A New Renormalization Scheme of Fermion Fields in Electroweak Standard Model
نویسنده
چکیده
Considering the quark mixing induced over-determination of fermion field Renormalization Constants in on-shell scheme, we propose a new scheme differs from usual ”Incoming fermion” scheme and ”Outcoming fermion” scheme, which satisfies all of the on-shell renormalization conditions, thus can be used in LSZ reduction formula without any deviation when we calculate S-matrix elements from correlation functions. PACS numbers: 11.10.Gh, 11.55.Ds, 12.15.Ff, 12.15.Lk ∗Email: [email protected]
منابع مشابه
The Littlest Higgs Model and One-Loop Electroweak Precision Constraints
We present in this talk the one-loop electroweak precision constraints in the Littlest Higgs model, including the logarithmically enhanced contributions from both fermion and scalar loops. We find the one-loop contributions are comparable to the tree level corrections in some regions of parameter space. A low cutoff scale is allowed for a non-zero triplet VEV. Constraints on various other param...
متن کاملO(ααs) Corrections to the On-Shell Fermion Propagator in the Standard Model
In this paper we consider mixed two-loop electroweak corrections to the top quark propagator in the Standard Model. In particular, we compute the on-shell renormalization constant for the mass and wave function, which constitute building blocks for many physical processes. The results are expressed in terms of master integrals. For the latter practical approximations are derived. In the case of...
متن کاملA Geometric Picture for Fermion Masses
We describe a geometric picture for the pattern of fermion masses of the three generations which is invariant with respect to the renormalization group below the electroweak scale. Moreover, we predict the upper limit for the ratio between the Dirac masses of the μ and τ neutrinos, ( mνμ/mντ ) ≤ (9.6 ± 0.6) × 10. The Standard Model [1, 2] of strong and electroweak interactions describes accurat...
متن کاملFERMILAB Conf-96/227 UPDATED ELECTROWEAK MEASUREMENTS FROM NEUTRINO-NUCLEON DEEPLY INELASTIC SCATTERING AT CCFR
We report the results of a study of electroweak parameters from observations of neutralcurrent νN deeply inelastic scattering in the CCFR detector at the FNAL Tevatron Quadrupole Triplet neutrino beam. An improved extraction of the weak mixing angle in the on-shell renormalization scheme, incorporating additional data and with an improved technique for constraining systematic errors, is present...
متن کامل(Non)decoupling of the Higgs triplet effects
We consider the electroweak theory with an additional Higgs triplet at one loop using the hybrid renormalization scheme based on αEM, GF and MZ as input observables. We show that in this scheme loop corrections can be naturally split into the Standard Model part and corrections due to “new physics”. The latter, however do not decouple in the limit of infinite triplet mass parameter, if the trip...
متن کامل