14 papers
Light new physics and the lepton dipole moments
Martin Hoferichter, Gabriele Levati
Testing New-Physics (NP) scenarios that couple predominantly to the third generation is notoriously difficult experimentally, as exemplified by comparing limits for the lepton…
Light new physics and the lepton dipole moments: prospects at Belle II
Martin Hoferichter, Gabriele Levati
While electron and muon dipole moments are well-established precision probes of physics beyond the standard model, it is notoriously challenging to test realistic new-physics (NP)…
Amplitudes and partial wave unitarity bounds
Luigi C. Bresciani, Gabriele Levati, Paride Paradisi
We develop a formalism, based on spinor-helicity techniques, to generalize the formulation of partial wave unitarity bounds. We discuss unitarity bounds for (with $N,M \g…
Four-fermion operators, -boson exchange, and lepton dipole moments
Joël Gogniat, Joël Gogniat, Martin Hoferichter +1
Asymmetry measurements in constitute a promising avenue to obtain competitive constraints on the dipole moments, the anomalous magnetic moment and the e…
Probing lepton dipole moments at future Lepton Colliders
Dario Buttazzo, Gabriele Levati, Yang Ma +3
The electric and magnetic dipole moments of the electron and of the muon provide stringent tests of the Standard Model and sensitive probes of new physics. By contrast, the corresp…
On the decay of a light spinless particle into two photons
Ferruccio Feruglio, Gabriele Levati, Robert Ziegler
We analyze the effective couplings of a light, spinless, gauge-singlet particle to on-shell photons. Starting from the most general theory at the electroweak scale, which allo…