MHV graviton scattering amplitudes and current algebra on the celestial sphere
Sign Up to like & getrecommendations! Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep02(2021)176
Abstract: Abstract The Cachazo-Strominger subleading soft graviton theorem for a positive helicity soft graviton is equivalent to the Ward identities for $$ \overline{\mathrm{SL}\left(2,\mathrm{\mathbb{C}}\right)} $$ SL 2 ℂ ¯ currents. This naturally gives rise to a $$… read more here.
Keywords: mhv graviton; graviton; celestial sphere; graviton scattering ... See more keywords
Zwanziger’s pairwise little group on the celestial sphere
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DOI: 10.1007/jhep11(2021)051
Abstract: Abstract We generalize Zwanziger’s pairwise little group to include a boost subgroup. We do so by working in the celestial sphere representation of scattering amplitudes. We propose that due to late time soft photon and… read more here.
Keywords: little group; zwanziger pairwise; celestial sphere; pairwise little ... See more keywords
Strings on celestial sphere
Sign Up to like & getrecommendations! Published in 2018 at "Nuclear Physics B"
DOI: 10.1016/j.nuclphysb.2018.08.019
Abstract: Abstract We transform superstring scattering amplitudes into the correlation functions of primary conformal fields on two-dimensional celestial sphere. The points on celestial sphere are associated to the asymptotic directions of (light-like) momenta of external particles,… read more here.
Keywords: celestial sphere; strings celestial;
w_{1+∞} Algebra and the Celestial Sphere: Infinite Towers of Soft Graviton, Photon, and Gluon Symmetries.
Sign Up to like & getrecommendations! Published in 2021 at "Physical review letters"
DOI: 10.1103/physrevlett.127.221601
Abstract: It is shown that the infinite tower of tree-level plus-helicity soft graviton symmetries in asymptotically flat 4D quantum gravity can be organized into a single chiral 2D Kac-Moody symmetry based on the wedge algebra of… read more here.
Keywords: towers soft; photon gluon; celestial sphere; gluon symmetries ... See more keywords