” The seemingly-anomalous magnetic moment of the muon – a novel reconciliation with the Standard Model and connection with Dark Matter” / Dr. Glennys Farrar (New York University)

Number	R4-10 /  Joint Seminar of ILANCE, IPMU and ICRR
Date&Time	January 13, 2023 14:00-
Place	IPMU Lecture room and Zoom: https://ipmu.zoom.us/j/98168903322
Speaker	Dr. Glennys Farrar (New York University) visiting ICRR
Title	“The seemingly-anomalous magnetic moment of the muon – a novel reconciliation with the Standard Model and connection with Dark Matter”
Abstract	Precision measurement of the magnetic moment of the muon yields a result 4.2 sigma above the prediction of the Standard Model. At the same time, the lattice QCD calculation of the “hadronic vacuum polarization” — essentially, a weighted integral of the cross section for e+e- -> hadrons — disagrees with the direct experimental measurement at a similar level.  I will propose that both discrepancies can be explained, quite naturally, by production of unseen final states in e+e- -> hadrons.  Such so-far-undiscovered hadrons have to be neutral and long-lived to have escaped detection, and in fact could be the Dark Matter particle.  I will discuss tests of this proposal.