Results 11 to 20 of about 883,360 (293)
Renormalization of the neutrino mass operator [PDF]
Physics Letters B, 1993 A small neutrino Majorana mass can arise in the Standard Model as an effective dimension 5 operator. We calculate the renormalization of this operator in the minimal Standard Model and in its two-Higgs-doublet and supersymmetric extensions. Renormalization from the scale of lepton number violation (e.g., the Planck scale or a GUT scale) to the weak ...
Babu, K. S. +2 more
openaire +4 more sources
Neutrino mass operator renormalization revisited
Physics Letters B, 2001 We re-derive the renormalization group equation for the effective coupling of the dimension five operator which corresponds to a Majorana mass matrix for the Standard Model neutrinos. We find a result which differs somewhat from earlier calculations, leading to modifications in the evolution of leptonic mixing angles and CP phases.
Antusch, Stefan +4 more
openaire +6 more sources
A study of the gauge invariant, nonlocal mass operator $Tr \int d^4x F_{\mu\nu}(D^2)^{-1} F_{\mu\nu}$ in Yang-Mills theories [PDF]
, 2005 The nonlocal mass operator $Tr \int d^4x F_{\mu\nu} (D^2)^{-1} F_{\mu\nu}$ is considered in Yang-Mills theories in Euclidean space-time. It is shown that the operator $Tr \int d^4x F_{\mu\nu} (D^2)^{-1} F_{\mu\nu}$ can be cast in local form through the ...
A. A. Slavnov +14 more
core +3 more sources
Renormalizing a BRST-invariant composite operator of mass dimension 2 in Yang-Mills theory [PDF]
, 2001 We discuss the renormalization of a BRST and anti-BRST invariant composite operator of mass dimension 2 in Yang-Mills theory with the general BRST and anti-BRST invariant gauge fixing term of the Lorentz type.
A. C. Hirschfeld +63 more
core +2 more sources
Condensed Matter Physics, 2015 The partial summing of infinite range of diagrams for the two-phonon mass operator of polaron described by Frohlich Hamiltonian is performed using the Feynman-Pines diagram technique.
M.V. Tkach +3 more
doaj +1 more source
Positive mass theorem for the Paneitz-Branson operator [PDF]
, 2008 We prove that under suitable assumptions, the constant term in the Green function of the Paneitz-Branson operator on a compact Riemannian manifold $(M,g)$ is positive unless $(M,g)$ is conformally diffeomophic to the standard sphere.
B. Ammann +9 more
core +5 more sources
Condensed Matter Physics, 2019 The theory of renormalized energy spectrum of a multi-level quasiparticle interacting with polarization phonons at T = 0 K is developed within the Feynman-Pines diagram technique in a new approach.
M.V. Tkach +3 more
doaj +1 more source
Classification of effective neutrino mass operators [PDF]
Nuclear Physics B, 2001 We present a classification of SU(3) x SU(2) x U(1) gauge invariant L = 2 (L being lepton number) effective operators relevant for generating small Majorana neutrino masses. Operators of dimension up to 11 have been included in our analysis. This approach enables us to systematically identify interesting neutrino mass models. It is shown that many of
Babu, K. S., Leung, C. N.
openaire +2 more sources
Condensed Matter Physics, 2017 The theory of renormalized energy spectrum of localized quasi-particle interacting with polarization phonons at finite temperature is developed within the Feynman-Pines diagram technique.
M.V. Tkach +3 more
doaj +1 more source
The three-loop single mass polarized pure singlet operator matrix element
Nuclear Physics B, 2020 We calculate the massive polarized three-loop pure singlet operator matrix element AQq(3),PS in the single mass case in the Larin scheme. This operator matrix element contributes to the massive polarized three-loop Wilson coefficient HQq(3),PS in deep ...
J. Ablinger +6 more
doaj +1 more source