The field of particle physics is at the crossroads. The discovery of a Higgs-like boson
completed the Standard Model (SM), but the lacking observation of convincing resonances …

The observed pattern of fermion masses and mixing is an outstanding puzzle in particle
physics, generally known as the flavor problem. Over the years, guided by precision neutrino …

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

The LHC has observed, so far, 3 deviations from the Standard Model (SM) predictions in
flavor observables: LHCb reported anomalies in B→ K* μ+ μ-and R (K)= B→ K μ+ μ-/B→ K …

We study the impact of an additional U (1)′ gauge symmetry with flavor-dependent charges
for quarks and leptons on the LHC flavor anomalies observed in B→ K* μ+ μ-, R (K)= B→ K …

We investigate the sensitivity of the projected TeV muon collider to the gauged L μ-L τ
model. Two processes are considered: Z′-mediated two-body scatterings μ+ μ-→ ℓ+ ℓ-with …

A bstract New neutral heavy gauge bosons (Z′) are predicted within many extensions of
the Standard Model. While in case they couple to quarks the LHC bounds are very stringent …

We define a new class of Z′ models with neutral flavor-changing interactions at tree level in
the down-quark sector. They are related in an exact way to elements of the quark mixing …

This paper is a review of the present status of neutrino mass physics, which grew out of an
APS sponsored study of neutrinos in 2004. After a discussion of the present knowledge of …

The energy spectrum of high-energy neutrinos reported by the IceCube Collaboration shows
a dip between 400 TeV and 1 PeV. One intriguing explanation is that high-energy neutrinos …