The two-loop remainder function for eight and nine particles

Autor: John Golden, Andrew J. McLeod

Publikováno v: Journal of High Energy Physics, Vol 2021, Iss 6, Pp 1-36 (2021)
Golden, J & McLeod, A J 2021, ' The two-loop remainder function for eight and nine particles ', Journal of High Energy Physics (Online), vol. 2021, no. 06, 142 . https://doi.org/10.1007/JHEP06(2021)142
Journal of High Energy Physics

Two-loop MHV amplitudes in planar ${\cal N} = 4$ supersymmetric Yang Mills theory are known to exhibit many intriguing forms of cluster-algebraic structure. We leverage this structure to upgrade the symbols of the eight- and nine-particle amplitudes

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c439552277ea42b7d3312e042c4367f
https://doaj.org/article/7d275c7e176e471a9e5ff4929fdf65d6

Algebraic branch points at all loop orders from positive kinematics and wall crossing

Autor: Aidan Herderschee

Publikováno v: Journal of High Energy Physics
Journal of High Energy Physics, Vol 2021, Iss 7, Pp 1-63 (2021)

There is a remarkable connection between the boundary structure of the positive kinematic region and branch points of integrated amplitudes in planar $\mathcal{N}=4$ SYM. A long standing question has been precisely how algebraic branch points emerge

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::85fcaa3581f103f70eaba33c53706ea8
https://doi.org/10.1007/jhep07(2021)049

Positive geometry, local triangulations, and the dual of the Amplituhedron

Autor: Enrico Herrmann, Cameron Langer, Minshan Zheng, Jaroslav Trnka

Publikováno v: Journal of High Energy Physics
Journal of High Energy Physics, Vol 2021, Iss 1, Pp 1-101 (2021)

We initiate the systematic study of \emph{local positive spaces} which arise in the context of the Amplituhedron construction for scattering amplitudes in planar maximally supersymmetric Yang-Mills theory. We show that all local positive spaces relev

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d8f32e9da805e0e2136f087b009c373
https://doi.org/10.1007/jhep01(2021)035

Multi-soft gluon limits and extended current algebras at null-infinity

Autor: Dhritiman Nandan, Tristan McLoughlin

Publikováno v: Journal of High Energy Physics, Vol 2017, Iss 8, Pp 1-29 (2017)
Journal of High Energy Physics

In this note we consider aspects of the current algebra interpretation of multi-soft limits of tree-level gluon scattering amplitudes in four dimensions. Building on the relation between a positive helicity gluon soft-limit and the Ward identity for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5448a447b4b1b2f0ccdddbede0f4f07
http://link.springer.com/article/10.1007/JHEP08(2017)124

MHV graviton scattering amplitudes and current algebra on the celestial sphere

Autor: Shamik Banerjee, Partha Paul, Sudip Ghosh

Publikováno v: Journal of High Energy Physics

The Cachazo-Strominger subleading soft graviton theorem for a positive helicity soft graviton is equivalent to the Ward identities for $\overline{SL(2,\mathbb C)}$ currents. This naturally gives rise to a $\overline{SL(2,\mathbb C)}$ current algebra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00282ffb3d71195903f19aa57908296e
http://id.nii.ac.jp/1394/00001846/