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Ernst Stückelberg
Ernst Carl Gerlach Stueckelberg (baptised as Johann Melchior Ernst Karl Gerlach Stückelberg, full name after 1911: Baron Ernst Carl Gerlach Stueckelberg von Breidenbach zu Breidenstein und Melsbach; 1 February 1905 – 4 September 1984) was a Swiss people, Swiss mathematician and physicist, regarded as one of the most eminent physicists of the 20th century. Despite making key advances in theoretical physics, including the exchange particle model of fundamental forces, causal S-matrix theory, and the renormalization group, his idiosyncratic style and publication in minor journals led to his work not being widely recognized until the mid-1990s. Early life Born into a semi-aristocratic family in Basel in 1905, Stueckelberg's father was a lawyer, and his paternal grandfather was the distinguished Swiss artist also named Ernst Stückelberg (painter), Ernst Stückelberg. A highly gifted school student, Stueckelberg initially began a physics degree at the University of Basel in 1923. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stueckelberg Action
In field theory, the Stueckelberg action (named after Ernst Stueckelberg) describes a massive spin-1 field as an R (the real numbers are the Lie algebra of U(1)) Yang–Mills theory coupled to a real scalar field \phi. This scalar field takes on values in a real 1D affine representation of R with m as the coupling strength. :\mathcal=-\frac(\partial^\mu A^\nu-\partial^\nu A^\mu)(\partial_\mu A_\nu-\partial_\nu A_\mu)+\frac(\partial^\mu \phi+m A^\mu)(\partial_\mu \phi+m A_\mu) This is a special case of the Higgs mechanism, where, in effect, and thus the mass of the Higgs scalar excitation has been taken to infinity, so the Higgs has decoupled and can be ignored, resulting in a nonlinear, affine representation of the field, instead of a linear representation — in contemporary terminology, a U(1) nonlinear -model. Gauge-fixing \phi=0, yields the Proca action. This explains why, unlike the case for non-abelian vector fields, quantum electrodynamics with a massive photon ''is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
