We explore generalized global symmetries in theories of physics beyond the standard
model. Theories of Z′ bosons generically contain “noninvertible” chiral symmetries, whose …

A bstract In this paper, we explore in detail the cosmological implications of an abelian L μ−
L τ gauge extension of the Standard Model featuring a light and weakly coupled Z′. Such a …

Abstract The Standard Model (SM) is augmented with a U (1) B− 3 L μ gauge symmetry
spontaneously broken above the TeV scale when an SM-singlet scalar condenses. Scalar …

This report summarizes the present status of neutrino non-standard interactions (NSI). After
a brief overview, several aspects of NSIs are discussed, including connection to neutrino …

A bstract At present, cosmological observations set the most stringent bound on the neutrino
mass scale. Within the standard cosmological model (ΛCDM), the Planck collaboration …

A bstract The MUonE experiment aims at a precision measurement of the hadronic vacuum
polarization contribution to the muon g− 2, via elastic muon-electron scattering. Since the …

A bstract In recent years, the gauge group\(\textrm {U}{(1)} _ {L_ {\mu}-{L} _ {\tau}}\) has
received a lot of attention since it can, in principle, account for the observed excess in the …

Extensions of the standard model of particle physics with new Abelian gauge groups allow
for kinetic mixing between the new gauge bosons and the hypercharge gauge boson …

Experimental hints for lepton-flavor universality violation in the muon's magnetic moment as
well as neutral-and charged-current B-meson decays require Standard-Model extensions by …

Differences in lepton number (ie, L eL μ, L eL τ, L μ-L τ, or combinations thereof) are not
conserved charges in the Standard Model due to the observation of neutrino oscillations. We …