#effective field theory
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GGI Lectures on Large-Scale Structure Perturbation Theory (Effective Field Theory)
Mikhail M. Ivanov
These lecture notes introduce non-linear perturbation theory and effective field theory methods for modeling the large-scale distribution of galaxies, targeting undergraduate and e…
NLSM amplitudes from a quartic two-derivative theory
Qu Cao, Zhenqi Han, Fan Zhu
The paper presents a local scalar Lagrangian with a single quartic two-derivative interaction that exactly reproduces planar nonlinear sigma model (NLSM) amplitudes at all loop ord…
Precise predictions for double Higgs production in association with a vector boson in Effective Field Theory
Ramona Gröber, MichaŠRyczkowski, Gioia Sacchi
The paper provides NNLO QCD predictions for Higgs boson pair production together with a W or Z boson, using both SMEFT and HEFT frameworks, and supplies fast‑evaluation coefficient…
geoSCET: Soft Theorems from Power Counting
Timothy Cohen, Patrick Hager, Andreas Helset
The paper develops a Soft Collinear Effective Theory for a geometric scalar field (geoSCET) and uses it to derive geometric soft theorems from power‑counting arguments, extending t…
Perturbing Gravitational Atoms: Negative Love, Resonant Tides and Shifted Resonances
Mateja BoÅ¡koviÄ, Nikola SaviÄ
The paper develops a framework to model how bosonic clouds (gravitational atoms) around rotating black holes respond to internal and external perturbations, calculating their tidal…
New exact bispectrum shapes in multifield inflation
Lucas Pinol
The paper presents an analytical, non‑perturbative calculation of the primordial bispectrum in multifield inflation, deriving integral representations for mixed curvature‑isocurvat…