4 papers
Isosinglet-isotriplet mixing and the lineshape
Davide Germani, Benjamin Grinstein
We investigate the lineshapes of the in decays production within a framework that incorporates two underlying QCD configurations: a compact isosinglet state a…
Taming forward scattering singularities in partial waves
Marta Fuentes Zamoro, BenjamÃn Grinstein, Pablo QuÃlez
Perturbative partial-wave amplitudes diverge in cases with a massless exchanged particle in the -channel. We argue that the divergence is an artifact of perturbation theory and…
Most general EFTs from spurion analysis: Hilbert series and Minimal Lepton Flavor Violation
BenjamÃn Grinstein, Xiaochuan Lu, Carlos Miró +1
We derive a saturation theorem for general Effective Field Theories (EFTs) constructed using spurion analysis. Let be a set of spurion fields introduced to organize the breakin…
Accidental Symmetries, Hilbert Series, and Friends
BenjamÃn Grinstein, Xiaochuan Lu, Carlos Miró +1
Accidental symmetries in effective field theories can be established by computing and comparing Hilbert series. This invites us to study them with the tools of invariant theory. Ap…