5 papers
Multipositivity Constrains the Chiral Lagrangian
Clifford Cheung, Jaehoon Jeong, Pyungwon Ko +3
The chiral Lagrangian is a cornerstone of modern particle physics, offering a systematic and quantitative description of low-energy pions. Using tools from the modern scattering am…
Causal Bounds on EFTs with anomalies with a Pseudoscalar, Photons, and Gravitons
Ziyu Dong, Jaehoon Jeong, Alex Pomarol
Theories with pseudoscalars that couple through anomalies (such as axion models) are of particular phenomenological interest. We carry out a comprehensive analysis of all bounds ob…
(Super)Gravity from Positivity
Brando Bellazzini, Alex Pomarol, Marcello Romano +1
We investigate whether the effective theory for isolated, massive, and weakly interacting spin- particles is compatible with causality and unitarity-i.e., the positivity of sc…
Bootstrapping the Chiral-Gravitational Anomaly
Zi-Yu Dong, Teng Ma, Alex Pomarol +1
We analyze causality and unitarity constraints in graviton scattering amplitudes, aiming to establish new bounds on theories with -gravitational anomalies, such as axion mode…
Nonthermal Heavy Dark Matter from a First-Order Phase Transition
Gian F. Giudice, Hyun Min Lee, Alex Pomarol +1
We study nonthermal production of heavy dark matter from the dynamics of the background scalar field during a first-order phase transition, predominantly from bubble collisions. In…