The new muon g-2 puzzle

Speakers: Paride Paradisi (Istituto Nazionale di Fisica Nucleare)

The recent measurement of the muon g-2 at Fermilab confirms the
previous Brookhaven result. The leading hadronic vacuum polarization (HVP)
contribution to the muon g-2 represents a crucial ingredient to establish
whether the Standard Model prediction differs from the experimental value.
A recent lattice QCD result by the BMW collaboration shows a tension with
the low-energy e+e- –> hadrons data which are currently used to determine
the HVP contribution. We refer to this tension as the new muon g-2 puzzle.
In this colloquium, we analyse whether new physics contributions can be
invoked to solve the new muon g-2 puzzle.

https://agenda.infn.it/event/31127/