Fourth-order contributions to μμ elastic scattering in the gauge theory of weak interactions

1977 ◽  
Vol 120 (1) ◽  
pp. 173-188 ◽  
Author(s):  
S.A. Baran ◽  
N. Ünal
Keyword(s):  
Gauge Theory ◽  
Elastic Scattering ◽  
Fourth Order ◽  
Weak Interactions

INVESTIGATIONS IN THE LEE–WICK ELECTRODYNAMICS

2011 ◽  
Vol 26 (26) ◽  
pp. 1985-1994 ◽  
Author(s):  
ANTONIO ACCIOLY ◽  
PATRICIO GAETE ◽  
JOSÉ HELAYËL-NETO ◽  
ESLLEY SCATENA ◽  
RODRIGO TURCATI
Keyword(s):  
Gauge Theory ◽  
Elastic Scattering ◽  
Comparative Study ◽  
Magnetic Moment ◽  
Heavy Particle ◽  
Gauge Invariant ◽  
Higher Derivatives ◽  
Electron Magnetic Moment ◽  
Invariant Dimension ◽  
Coulomb Potentials

We consider the Lee–Wick (LW) electrodynamics, i.e. the U(1) gauge theory where a (gauge-invariant) dimension-6 operator containing higher derivatives is added to the free Lagrangian of the U(1) sector. A quantum bound on the LW heavy particle mass is then estimated by computing the anomalous electron–magnetic moment in the context of the aforementioned model. This limit is not only within the allowed range estimated by LW, it is also of the same order as that considered in early investigations on the possible effects of the LW heavy particle in e-e+ elastic scattering. A comparative study between the LW and the Coulomb potentials is also done.

A Gauge Theory for the Weak and Electromagnetic Interactions

2021 ◽  
pp. 388-404
Author(s):  
J. Iliopoulos ◽  
T.N. Tomaras
Keyword(s):  
Gauge Theory ◽  
Quark Model ◽  
Weak Interactions ◽  
Mass Matrix ◽  
Natural Source ◽  
Apparent Difference ◽  
Electromagnetic Interactions ◽  
Vector Bosons ◽  
Gim Mechanism ◽  
Intermediate Vector

In this chapter we develop the Glashow–Weinberg–Salam theory of electromagnetic and weak interactions based on the gauge group SU(2) × U(1). We show that the apparent difference in strength between the two interactions is due to the Brout–Englert–Higgs phenomenon which results in heavy intermediate vector bosons. The model is presented first for the leptons, and then we argue that the extension to hadrons requires the introduction of a fourth quark. We show that the GIM mechanism guarantees the natural suppression of strangeness changing neutral currents. In the same spirit, the need to introduce a natural source of CP-violation leads to a six quark model with the Cabibbo–Kobayashi–Maskawa mass matrix.

SU(2) × U(l): A gauge theory of weak interactions?

Nature ◽  
1978 ◽  
Vol 271 (5640) ◽  
pp. 20-23 ◽  
Author(s):  
David Bailin ◽  
Norman Dombey
Keyword(s):  
Gauge Theory ◽  
Weak Interactions

EFFECTIVE CHIRAL LAGRANGIANS FOR STRONG, WEAK AND ELECTROMAGNETIC-WEAK INTERACTIONS OF MESONS FROM QUARK FLAVOR DYNAMICS

1993 ◽  
Vol 08 (07) ◽  
pp. 1313-1344 ◽  
Author(s):  
D. EBERT ◽  
A.A. BEL’KOV ◽  
A.V. LANYOV ◽  
A. SCHAALE
Keyword(s):  
Path Integral ◽  
Fourth Order ◽  
Chiral Lagrangians ◽  
Weak Interactions ◽  
Axial Vector ◽  
Chiral Expansion ◽  
Strong Interactions ◽  
Vector Mesons ◽  
Quark Flavor

Effective chiral Lagrangians for strong, weak and electromagnetic-weak interactions of composite pseudoscalar, vector and axial-vector mesons are derived up to the fourth order in the chiral expansion from quark flavor dynamics based on the Nambu-Jona-Lasinio model. This approach completes earlier work on strong interactions and applies the path-integral bosonization method to the nonleptonic weak quark Lagrangian including the emission of structural photons. As illustrations, the bosonized weak and electromagnetic-weak Lagrangians are applied to the description of K→π(η) and K→π(η)γ* transitions.

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