# Resources

## Publications

• ### Anisotropic photon and electron scattering without ultrarelativistic approximation

Author(s): Anderson C. M. Lai and Kenny C. Y. Ng The authors present exact numerical computations leading to a general theoretical formalism of Compton and inverse Compton scattering in several key astrophysical processes, such as X- & γ-ray polarization and astrophysical jets. Their assumption of (1) anisotropic photons and electrons, and (2) no ultrarelativistic approximations, demonstrates major deviations in certain regimes compared to previous...
• ### Perturbation theory with dispersion and higher cumulants: Framework and linear theory

Author(s): Mathias Garny, Dominik Laxhuber, and Román Scoccimarro The authors develop an alternative perturbative approach to gravitational clustering and the large-scale structure. This approach is complementary to the effective field theory approach while being much more predictive and providing a more detailed understanding of mechanisms like the decoupling of nonlinear small-scale modes into dark matter halos where standard perturbation theory...
• ### Perturbation theory with dispersion and higher cumulants: Nonlinear regime

Author(s): Mathias Garny, Dominik Laxhuber, and Román Scoccimarro The authors develop an alternative perturbative approach to gravitational clustering and the large-scale structure. This approach is complementary to the effective field theory approach while being much more predictive and providing a more detailed understanding of mechanisms like the decoupling of nonlinear small-scale modes into dark matter halos where standard perturbation theory...
• ### Averages of $b$-hadron, $c$-hadron, and $τ$-lepton properties as of 2021

Author(s): Y. Amhis et al. (Heavy Flavor Averaging Group Collaboration) The Heavy Flavor Averaging Group has released new world averages for properties of “heavy-flavor” particle decays—an update aimed at improving our understanding of flavor physics. [Phys. Rev. D 107, 052008] Published Thu Mar 23, 2023
• ### Binary geometries, generalized particles and strings, and cluster algebras

Author(s): Nima Arkani-Hamed, Song He, Thomas Lam, and Hugh Thomas The authors study the fundamental properties of scattering amplitudes of particles in any spacetime dimension. They introduce binary geometries, giving a completely rigid geometric realization of the combinatorics of generalized associahedra attached to any Dynkin diagram. Furthermore, they define open and closed “cluster string integrals”, which provide a generalization of particle...
• ### Conserved currents for a Kerr black hole and orthogonality of quasinormal modes

Author(s): Stephen R. Green, Stefan Hollands, Laura Sberna, Vahid Toomani, and Peter Zimmerman Using a symmetry of the Kerr spacetime, the authors determine an original bilinear form for perturbations of the Weyl scalars. They show that upon choosing appropriate integration contours, this form can also be used on quasi-normal mode data. This manuscript provides a formalism for studying ringdown beyond the leading order, with potential application...
• ### Prototype global analysis of LISA data with multiple source types

Author(s): Tyson B. Littenberg and Neil J. Cornish A space-based observatory will detect gravitational waves from so many different types of sources at once that a global approach will be needed to crunch the data. [Phys. Rev. D 107, 063004] Published Tue Mar 07, 2023