Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Jehu, Guy R."'
Publikováno v:
JHEP03(2022)214
In the two-body scattering problem in general relativity, we study the final graviton particle distribution using a perturbative approach. We compute the mean, the variance and the factorial moments of the distribution from the expectation value of t
Externí odkaz:
http://arxiv.org/abs/2112.07036
We prove the conjecture made by Bern, Dixon, Dunbar, and Kosower that describes a simple dimension shifting relationship between the one-loop structure of N = 4 MHV amplitudes and all-plus helicity amplitudes in pure Yang-Mills theory. The proof capt
Externí odkaz:
http://arxiv.org/abs/2110.15227
A conjecture made by Bern, Dixon, Dunbar, and Kosower asserts a simple dimension-shifting relationship between the one-loop structure of N = 4 MHV amplitudes and all-plus helicity amplitudes in pure Yang-Mills theory. We prove this conjecture to all
Externí odkaz:
http://arxiv.org/abs/2011.13821
Autor:
Jehu, Guy R.
Publikováno v:
JHEP, 2021, 02, 013
We derive useful reduction formulae which express one-loop Feynman integrals with a large number of external momenta in terms of lower-point integrals carrying easily derivable kinematic coefficients which are symmetric in the external momenta. These
Externí odkaz:
http://arxiv.org/abs/2010.16266
Recent Developments in computing very specific helicity amplitudes in two loop QCD are presented. The techniques focus upon the singular structure of the amplitude rather than on a diagramatic and integration approach
Comment: Talk presented at
Comment: Talk presented at
Externí odkaz:
http://arxiv.org/abs/1712.05312
We extend the $S$-matrix of gravity by the addition of the minimal three-point amplitude or equivalently adding $R^3$ terms to the Lagrangian. We demonstrate how Unitarity can be used to simply examine the renormalisability of this theory and determi
Externí odkaz:
http://arxiv.org/abs/1711.05526
Publikováno v:
Phys. Rev. D 96, 116013 (2017)
We detail the calculation of two-loop all-plus helicity amplitudes for pure Yang-Mills theory. The four dimensional unitarity methods and augmented recursion techniques we have developed, together with a knowledge of the singular structure of the amp
Externí odkaz:
http://arxiv.org/abs/1710.10071
We show how the $S$-matrix of an extended theory of gravity defined by its three-point amplitudes can be constructed by demanding factorisation. The resultant $S$-matrix has tree amplitudes obeying the same soft singularity theorems as Einstein gravi
Externí odkaz:
http://arxiv.org/abs/1702.08273
Publikováno v:
Phys. Rev. D 95, 046012 (2017)
We compute the polylogarithmic parts of the two-loop four and five-graviton amplitudes where the external helicities are positive and express these in a simple compact analytic form. We use these to extract the $\ln(\mu^2)$ terms from both the four a
Externí odkaz:
http://arxiv.org/abs/1701.02934
Publikováno v:
Phys. Rev. D 93, 125006 (2016)
We propose a compact analytic expression for the polylogarithmic part of the n-point two-loop all-plus helicity amplitude in gauge theory.
Comment: normalisation made consistent
Comment: normalisation made consistent
Externí odkaz:
http://arxiv.org/abs/1604.06631