On the problem of mass-dependence of the two-point function of the real scalar free massive field on the light cone

Abstract

We investigate the generally assumed inconsistency in light cone quantum field theory that the restriction of a massive, real, scalar, free field to the nullplane $\Sigma =\{x^0+x^3=0\}$ is independent of mass \cite{LKS}, but the restriction of the two-point function depends on it (see, e.g., \cite{NakYam77, Yam97}). We resolve this inconsistency by showing that the two-point function has no canonical restriction to $\Sigma$ in the sense of distribution theory. Only the so-called tame restriction of the two-point function exists which we have introduced in \cite{Ull04sub}. Furthermore, we show that this tame restriction is indeed independent of mass. Hence the inconsistency appears only by the erroneous assumption that the two-point function would have a (canonical) restriction to $\Sigma$.

arXiv comment10 pages, 2 figures

References in corpus (4)

• Quantum Chromodynamics and Other Field Theories on the Light Cone
• Zero Mode and Symmetry Breaking on the Light Front
• The Continuum Version of ϕ^4_{1+1}-theory in Light-Front Quantization
• Uniqueness in the Characteristic Cauchy Problem of the Klein-Gordon Equation and Tame Restrictions of Generalized Functions

Cited by in corpus (6)

• The Light-Front Vacuum
• Wavelet representation of light-front quantum field theory
• The relation between instant and light-front formulations of quantum field theory
• Uniqueness in the Characteristic Cauchy Problem of the Klein-Gordon Equation and Tame Restrictions of Generalized Functions
• Entanglement and magic on the light-front
• Mass dependence of wightman function and light front singularity