2010/03/31 by Swati M. Patel, Anuradha Misra · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #hep-th
paper · pdf · doi:10.1103/physrevd.82.125024
published as Phys.Rev.D82:125024,2010 · 18 pages and 7 figures
arxiv created 2010/04/21 · openalex publication_date 2010/12/17 · arxiv updated 2010/12/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
One loop expressions for fermion self energy,vacuum polarization and vertex correction in light front time ordered perturbation theory (LFTPOT) can be obtained from respective covariant expressions by performing k- integration. In earlier work, we have shown that the third term in the doubly transverse gauge propagator is necessary to generate the diagrams involving instantaneous photon exchange both in case of fermion self-energy as well as vertex correction.In this work,we show that instantaneous photon exchange diagrams in fermion self-energy as well as th IR singular terms in the propagating diagrams can be generated by taking the asymptotic limit of the covariant expression,if one uses the commonly used two term photon propagator.We also show that this method reproduces the IR singular terms in propagating diagrams of vacuum polarization.