Theory seminar - Balasubramanian Ananthanarayan

  • Theory seminar - Balasubramanian Ananthanarayan
    https://jlab.bluejeans.com/319089525/6769
    Remote
    2021-10-25EDT13:00:00 ~ 2021-10-25EDT14:00:00
    16041
Not all computers/devices will add this event to your calendar automatically. A calendar event file named "jlab-calendar.ics" will be placed in your downloads location. Depending on how your device/computer is configured, you may have to locate this file and double click on it to add the event to your calendar. Event dates, times, and locations are subject to change. Event details will not be updated automatically once you add this event to your own calendar. It is recommended that you confirm details prior to the event by visiting The live JLab Event Calendar. If you need assistance contact helpdesk@jlab.org

We kindly ask all attendees to provide their full names on BlueJeans when entering the event.

Speaker: Balasubramanian Ananthanarayan (Indian Institute of Science)

Title: (g-2) of the Muon: Theory and Experiment Challenge One Another

Abstract: The muon is a heavy cousin of the electron and has a gyromagnetic ratio of 2 in the classical limit, which was predicted by Dirac. In QED it receives an anomalous magnetic moment which was computed by Julian Schwinger at leading order. Today, in QED it is evaluated to very high loop order, and also receives corrections from virtual processes in the vacuum as dictated by the laws of quantum field theory, which have to be evaluated in a variety of ways. It is also measured at high precision today at Fermilab, whose recent results confirm the value measured at Brookhaven about 20 years ago. More data is being gathered to lower the uncertainty. The theoretical value which is known at high precision deviates from the experimental measurement at several standard deviations. The quantity is also measured on the lattice with larger errors. In this talk, meant for a non-specialist audience, we will review these developments. Time permitting, we will speak about our own work that has played a role in lowering the uncertainties in the theoretical hadronic vacuum polarization contributions.


Event Date
-
Location
Remote
Category
Scientific Program
Seminars
Contact Name
Patrick Barry
Phone
(708) 612-0198