52 citations · 207 across the 19 of their papers we have counts for
21 papers
de Sitter Wavefunction from Quadrangular Polylogarithms: Polygon Graphs
Livia Ferro, Tomasz Lukowski, Shruti Paranjape +5
We present an explicit formula for the -gon graph contribution to the integrand of the cosmological wavefunction for conformally coupled theory in de Sitter space. Our res…
Direct-to-Symbol Integration from Landau Analysis
Craig Larkin, Andrew J. McLeod, Andrzej Pokraka +1
We propose a Landau-analysis-inspired strategy for directly computing the symbol of integrals that evaluate to multiple polylogarithms in twisted cohomology. The central idea is to…
Mass/electric versus NUT/magnetic charges: duality from scattering amplitudes in and for all bosonic spins
Ricardo Monteiro, Lecheng Ren, Daniel Siretanu
We revisit Kerr-NUT metrics and related spin- fields in , and study their associated scattering amplitudes. Starting in position space, we highlight the interpretation o…
Energy-Energy Correlators at Strong Coupling
Max Jackson, Lecheng Ren, Bo Wang +1
We study energy-energy correlators (EEC) in planar super Yang-Mills theory at strong 't Hooft coupling . We consider the EEC in states created by half-BPS operat…
A Graphical Coaction for FRW Integrals from Partial/Relative Twisted (Co)homology
Andrew J. McLeod, Andrzej Pokraka, Lecheng Ren
We construct a graphical coaction for Friedmann-Robertson-Walker (FRW) integrals at all loop orders in conformally-coupled scalar theories with non-conformal polynomial interaction…
de Sitter Wavefunction from Quadrangular Polylogarithms: Chain Graphs
Livia Ferro, Tomasz Lukowski, Lecheng Ren +4
We present an explicit formula for the -site chain graph contribution to the cosmological wavefunction for conformally coupled theory in de Sitter space. Our result relies…
A Graphical Coaction for FRW Wavefunction Coefficients
Andrew McLeod, Andrzej Pokraka, Lecheng Ren
We show that the wavefunction of the universe in theories of conformally coupled scalars in power-law Friedmann-Robertson-Walker (FRW) cosmologies satisfies a graphical coaction, b…
Energy-Energy Correlator from the AdS Virasoro-Shapiro Amplitude
Lecheng Ren, Bo Wang, Congkao Wen
We establish a precise formula relating the world-sheet integral of the AdS Virasoro-Shapiro amplitude to the energy-energy correlator (EEC) in super Yang-Mills the…
Superstring amplitudes from the field-theory limit: an n-point map at one loop
Ricardo Monteiro, Lecheng Ren
Are perturbative superstring amplitudes for massless external states just an dressing of super-Yang-Mills/supergravity? This is the case at tree level, where the worldsheet co…
A double copy from twisted (co)homology at genus g
Andrzej Pokraka, Lecheng Ren, Carlos Rodriguez
We study a family of generalized hypergeometric integrals defined on punctured Riemann surfaces of genus g. These integrals are closely related to g-loop string amplitudes in chira…
Superstring amplitudes from BCJ numerators at one loop
Yvonne Geyer, Jiachen Guo, Ricardo Monteiro +1
We find a direct map that determines moduli-space integrands for one-loop superstring amplitudes in terms of field-theory loop integrands in the BCJ form. The latter can be compute…
Five-dimensional spinor helicity for all masses and spins
Andrzej Pokraka, Smita Rajan, Lecheng Ren +2
We develop a spinor helicity formalism for five-dimensional scattering amplitudes of any mass and spin configuration. While five-dimensional spinor helicity variables have been pre…
A double copy from twisted (co)homology at genus one
Rishabh Bhardwaj, Andrzej Pokraka, Lecheng Ren +1
We study the twisted (co)homology of a family of genus-one integrals -- the so called Riemann-Wirtinger integrals. These integrals are closely related to one-loop string amplitudes…
One-loop Integrals from Volumes of Orthoschemes
Lecheng Ren, Marcus Spradlin, Cristian Vergu +1
Recently in arXiv:2012.05599 Rudenko presented a formula for the volume of hyperbolic orthoschemes in terms of alternating polylogarithms. We use this result to provide an explicit…
All-order celestial OPE from on-shell recursion
Lecheng Ren, Anders Schreiber, Atul Sharma +1
We determine tree level, all-order celestial operator product expansions (OPEs) of gluons and gravitons in the maximally helicity violating (MHV) sector. We start by obtaining the…
Loop-level gluon OPEs in celestial holography
Rishabh Bhardwaj, Luke Lippstreu, Lecheng Ren +3
We compute one-loop corrections to the OPE of gluons in the celestial conformal field theory corresponding to Yang-Mills coupled to arbitrary matter. We exploit universal hard/soft…
On Effective Field Theories with Celestial Duals
Lecheng Ren, Marcus Spradlin, Akshay Yelleshpur Srikant +1
We show that associativity of the tree-level OPE in a celestial CFT imposes constraints on the coupling constants of the corresponding bulk theory. These constraints are the same a…
Deformed Algebras in the Celestial CFT
Jorge Mago, Lecheng Ren, Akshay Yelleshpur Srikant +1
We compute the modification of the algebra of soft graviton, gluon and scalar currents in the celestial CFT due to non-minimal couplings. We find that the Jacobi ide…
Celestial Dual Superconformal Symmetry, MHV Amplitudes and Differential Equations
Yangrui Hu, Lecheng Ren, Akshay Yelleshpur Srikant +1
Celestial and momentum space amplitudes for massless particles are related to each other by a change of basis provided by the Mellin transform. Therefore properties of celestial am…
Symbol Alphabets from Tensor Diagrams
Lecheng Ren, Marcus Spradlin, Anastasia Volovich
We propose to use tensor diagrams and the Fomin-Pylyavskyy conjectures to explore the connection between symbol alphabets of -particle amplitudes in planar Yang-…
Notes on polytopes, amplitudes and boundary configurations for Grassmannian string integrals
Song He, Lecheng Ren, Yong Zhang
We continue the study of positive geometries underlying the {\it Grassmannian string integrals}, which are a class of "stringy canonical forms", or stringy integrals, over the posi…