Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Casali, Eduardo"'
On-shell kinematics for gluon scattering can be parametrized with points on the celestial sphere; in the limit where these points collide, it is known that tree-level gluon scattering amplitudes exhibit an operator product expansion (OPE)-like struct
Externí odkaz:
http://arxiv.org/abs/2211.17124
Autor:
Bu, Wei, Casali, Eduardo
We give an explicit realization of the 4d local operator / 2d conformal block correspondence of Costello and Paquette in the case of gauge theories. This is accomplished by lifting the 4d local operators to non-local operators in twistor space using
Externí odkaz:
http://arxiv.org/abs/2208.06334
Both celestial and momentum space amplitudes in four dimensions are beset by divergences resulting from spacetime translation and sometimes scale invariance. In this paper we consider a (linearized) marginal deformation of the celestial CFT for Yang-
Externí odkaz:
http://arxiv.org/abs/2204.10249
Publikováno v:
JHEP 2206: 052, 2022
We compute the operator product expansions of gluons and gravitons in celestial CFT from the worldsheet OPE of vertex operators of four-dimensional ambitwistor string theories. Remarkably, the worldsheet OPE localizes on the short-distance singularit
Externí odkaz:
http://arxiv.org/abs/2111.02279
The quantum gravity path integral involves a sum over topologies that invites comparisons to worldsheet string theory and to Feynman diagrams of quantum field theory. However, the latter are naturally associated with the non-abelian algebra of quantu
Externí odkaz:
http://arxiv.org/abs/2101.12221
Autor:
Casali, Eduardo, Sharma, Atul
Using the ambitwistor string, we compute tree-level celestial amplitudes for biadjoint scalars, Yang-Mills and gravity to all multiplicities. They are presented in compact CHY-like formulas with operator-valued scattering equations and numerators act
Externí odkaz:
http://arxiv.org/abs/2011.10052
Autor:
Casali, Eduardo, Puhm, Andrea
Publikováno v:
Phys. Rev. Lett. 126, 101602 (2021)
Celestial amplitudes which use conformal primary wavefunctions rather than plane waves as external states offer a novel opportunity to study properties of amplitudes with manifest conformal covariance and give insight into a potential holographic cel
Externí odkaz:
http://arxiv.org/abs/2007.15027
Publikováno v:
JHEP 2021, 48 (2021)
Color-kinematics duality is a remarkable conjectured property of gauge theory which, together with double copy, is at the heart of a wealth of new developments in scattering amplitudes. So far, its validity has been verified in most cases only empiri
Externí odkaz:
http://arxiv.org/abs/2005.05329
We reformulate the monodromy relations of open-string scattering amplitudes as boundary terms of twisted homologies on the configuration spaces of Riemann surfaces of arbitrary genus. This allows us to write explicit linear relations involving loop i
Externí odkaz:
http://arxiv.org/abs/1910.08514
The $D=11$ pure spinor superparticle has been shown to describe linearized $D=11$ supergravity in a manifestly covariant way. A number of authors have proposed that its correlation functions be used to compute amplitudes. The use of the scalar struct
Externí odkaz:
http://arxiv.org/abs/1905.03737