WebMar 26, 2024 · We provide many examples of celestial amplitudes in UV-completed models including linear sigma models and Z-theory, which is a certain completion of the SU(N) non-linear sigma model. We also comment on the BCFW-like and soft recursion relations for celestial amplitudes and the extension of soft bootstrap ideas. 45 pages of … WebSep 22, 2024 · The U.S. Department of Energy's Office of Scientific and Technical Information
Celestial IR divergences and the effective action of …
WebApr 27, 2024 · The all-loop resummation of SU$(N)$ gauge theory amplitudes is known to factorize into an IR-divergent (soft and collinear) factor and a finite (hard) piece. The divergent factor is universal, whereas the hard function is a process-dependent quantity. We prove that this factorization persists for the corresponding celestial amplitudes. … Web2 Celestial amplitudes in N = 4 SYM. 2.1 Review of the BDS Ansatz; 2.2 IR divergences in celestial n-point correlators; 2.3 BDS celestial amplitude; 2.4 Divergent part as a conformal correlator; 2.5 Finite part: The UV and the positivity of the cusp anomalous dimension. 2.5.1 Four gluons; 2.5.2 Five gluons; 3 Infrared divergences in gluon ... scp fontanet cherbourg
A Note on the Analytic Structure of Celestial Amplitudes
WebMar 14, 2024 · Fundamental principles of local quantum field theory or of quantum gravity can enforce consistency requirements on the space of consistent low-energy effective field theories. We survey the various techniques that have been used to put UV constraints on IR physics, including those from causality considerations in the form of S-matrix positivity … WebJan 27, 2024 · Affiliation: Perimeter InstituteAbstract: Celestial amplitudes compute 4D scattering matrices in a basis of boost, rather than conventional energy-momentum e... Webfeatures of amplitudes into this new representation. Soft theorems map to factorization theorems at special con-formal dimensions [5–10], collinear limits are captured by operatorproductexpansions[10–15],doublecopyrelations in amplitudes persist [16], and the UV/IR mixing intrinsic to this map has offered more insight into analyticity con- scp food dispenser