Light front Hamiltonian formulation of QED and some tree level applications

Autor:	M Valdés, M K Sundaresan
Rok vydání:	2004
Předmět:	Physics Nuclear and High Energy Physics symbols.namesake Particle physics Singularity Hamiltonian formalism Infrared Electron–positron annihilation symbols Gravitational singularity Gauge theory Quantum field theory Hamiltonian (quantum mechanics)
Zdroj:	Journal of Physics G: Nuclear and Particle Physics. 30:637-661
ISSN:	1361-6471 0954-3899
DOI:	10.1088/0954-3899/30/5/007
Popis:	In the light front formulation of quantum field gauge theories linear infrared singularities are present which must be addressed. In works by Zhang and Harindranath a prescription is given for the treatment of these singularities. They show that the application of this prescription leads to the cancellation of the linear infrared singularities in loop diagrams. In this work we do a second-order perturbative calculation and calculate the cross sections for e+e− → e+e− and give results for eγ → eγ, e+e− → μ+μ−, eμ → eμ applying the prescription to cancel the linear infrared singularity, whenever present. We show that the well-known expressions of the different cross sections for these processes are exactly reproduced.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::95a180f8e3e2cc756b17a5901be8d5bb https://doi.org/10.1088/0954-3899/30/5/007 Zobrazit plný text záznamu