Zobrazeno 1 - 10
of 175
pro vyhledávání: '"James P. Edwards"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 9, Pp 1-28 (2024)
Abstract We use the worldline formalism to derive Bern-Kosower type Master Formulae for the tree-level scattering of a charged particle and an arbitrary number of photons on impulsive PP-waves, where the coupling of the PP-wave to matter is treated f
Externí odkaz:
https://doaj.org/article/e4887c1c388d428cb4acb3a4ca7b9e99
Autor:
James P. Edwards, Christian Schubert
Publikováno v:
Physics Letters B, Vol 822, Iss , Pp 136696- (2021)
We use the worldline formalism to derive master formulas for the one-loop N-photon amplitudes in a plane-wave background, for both scalar and spinor quantum electrodynamics. This generalises previous work by Ilderton and Torgrimsson for the vacuum po
Externí odkaz:
https://doaj.org/article/54cd72ce4ec94901b3ae4c553f1a0145
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 8, Pp 1-21 (2019)
Abstract The worldline formalism is a useful scheme in quantum field theory which has also become a powerful tool for numerical computations. The key ingredient in this formalism is the first quantization of an auxiliary point-particle whose transiti
Externí odkaz:
https://doaj.org/article/731fbe4485af485b808deed319386139
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 5, Pp 1-35 (2019)
Abstract We consider one-particle reducible (1PR) contributions to QED and scalar QED processes in external fields, at one-loop and two-loop order. We investigate three cases in detail: constant crossed fields, constant magnetic fields, and plane wav
Externí odkaz:
https://doaj.org/article/93b0e05115cc46c9b41485ddb043ee23
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 4, Pp 1-35 (2019)
Abstract We present an approach to U⋆(N) Yang-Mills theory in non-commutative space based upon a novel phase-space analysis of the dynamical fields with additional auxiliary variables that generate Lorentz structure and colour degrees of freedom. T
Externí odkaz:
https://doaj.org/article/d58586761f17449198e6f0ca32c0e667
Autor:
Yu Cai, Jun Yu, Ping Ren, Jianlin He, Zhipeng Wu, Kun Xiao, Hong Jia, Jian Wang, Yang Sai, Guangxiu Dai, Xiong Li, Weiguo Su, Karen Ngo, Glenda Castro, Paul D. Acton, Wai‐Ping Fung‐Leung, James P. Edwards, Jennifer Venable, Tadimeti S. Rao
Publikováno v:
Pharmacology Research & Perspectives, Vol 8, Iss 1, Pp n/a-n/a (2020)
Abstract Phosphoinositide 3‐kinases, delta (PI3Kδ) and gamma (PI3Kγ) are enriched in immune cells and regulate the development and function of innate and adaptive immunity. Dual PI3Kδγ inhibitors are considered high value targets for their pote
Externí odkaz:
https://doaj.org/article/d35f0a94d6e5495fbd5b168fdf381dbd
Publikováno v:
Nuclear Physics B, Vol 935, Iss , Pp 198-209 (2018)
In recent work, Gies and Karbstein have discovered that the two-loop Euler–Heisenberg Lagrangians for scalar and spinor QED have non-vanishing reducible contributions in addition to the well-studied irreducible ones. This invalidates previous appli
Externí odkaz:
https://doaj.org/article/e67175a8ee1243caaffdae853ed2863d
Autor:
James P. Edwards, Christian Schubert
Publikováno v:
Nuclear Physics B, Vol 923, Iss C, Pp 339-349 (2017)
Recently, Gies and Karbstein showed that the two-loop Euler–Heisenberg Lagrangian receives a finite one-particle reducible contribution in addition to the well-known one-particle irreducible one. Here, we demonstrate that a similar contribution exi
Externí odkaz:
https://doaj.org/article/7b6a109242384eabbe510d2a76a549ee
Autor:
James P. Edwards
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 77, Iss 5, Pp 1-7 (2017)
Abstract We reconsider the fundamental commutation relations for non-commutative $$\mathbb {R}^{2}$$ R 2 described in polar coordinates with non-commutativity parameter $$\theta $$ θ . Previous analysis found that the natural transition from Cartesi
Externí odkaz:
https://doaj.org/article/4e0a908cf2d1483d97565966cd8dacdf
Autor:
James P. Edwards
Publikováno v:
Physics Letters B, Vol 750, Iss C, Pp 312-318 (2015)
We explore unified field theories based on the gauge groups SU(5) and SO(10) using the worldline approach for chiral fermions with a Wilson loop coupling to a background gauge field. Representing path ordering and chiral projection operators with fun
Externí odkaz:
https://doaj.org/article/8d118d8bf4494fb39a42ddbaf4d9172c