Zobrazeno 1 - 10
of 285
pro vyhledávání: '"DUNBAR, DAVID"'
The seven-gluon two-loop full-color Yang-Mills amplitude is presented in a compact analytic form where we use the methods of four-dimensional unitarity cuts to obtain the polylogarithmic pieces and augmented recursion to obtain the rational pieces. F
Externí odkaz:
http://arxiv.org/abs/2409.15864
Autor:
Dunbar, David C.
We characterise possible identities among the two-loop partial amplitudes of gluon scattering in Yang-Mills theory. We use known amplitudes in an exhaustive search to identify potential new relations. We find two candidate relations which may extend
Externí odkaz:
http://arxiv.org/abs/2308.06602
Publikováno v:
Phys. Rev. D 101, 076024 (2020)
We present the full color two-loop six-point all-plus Yang-Mills amplitude in compact analytic form. The computation uses four dimensional unitarity and augmented recursion.
Comment: 19 pages, 1 figure. arXiv admin note: text overlap with arXiv:
Comment: 19 pages, 1 figure. arXiv admin note: text overlap with arXiv:
Externí odkaz:
http://arxiv.org/abs/2003.00897
Publikováno v:
Phys. Rev. D 101, 076001 (2020)
We present an explicit expression for a particular $n$-gluon two loop scattering partial amplitude. Specifically we present an analytic form for the single trace $N_c$ independent colour partial amplitude for the case where all external gluons have p
Externí odkaz:
http://arxiv.org/abs/2001.11347
Publikováno v:
Phys. Rev. D 101, 016009 (2020)
We present a direct computation of the full color two-loop five-point all-plus Yang-Mills amplitude using four dimensional unitarity and recursion. We present the $SU(N_c)$ amplitudes in compact analytic forms. Our results match the explicit expressi
Externí odkaz:
http://arxiv.org/abs/1911.06547
Autor:
Dunbar, David Arthur
The purpose of this study is to demonstrate that Symphony No. 1 in F major, Op. 17, by Zdeněk Fibich embodies musical style features associated with both Czech and German composers of the nineteenth century. The identification of these style feature
Externí odkaz:
http://hdl.handle.net/10150/626371
http://arizona.openrepository.com/arizona/handle/10150/626371
http://arizona.openrepository.com/arizona/handle/10150/626371
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