Nuclear Theory Seminar

Fri, Aug 31, 2018 11:00 am - 12:30 pm


Speaker: Bipasha Chakraborty

Speaker Institution: Jefferson Lab

Title: Lattice QCD calculation of the hadronic vacuum polarisation contribution to muon g-2

Abstract: The Muon anomalous magnetic moment is one of the very few quantities in the Standard Model (SM) of particle physics which is both measured in experiment and calculated from theory with impressive accuracy of sub-parts per million (ppm). Intriguingly, there exists a tantalizing discrepancy of more than three standard deviations between the experimental and the SM results of this quantity providing one of the most stringent tests of the theory. The ongoing Fermilab experiment E989 and the upcoming experiment at J-PARC expect a four-fold improvement in the experimental precision (0.16 ppm expected). The theoretical uncertainty in this quantity is dominated by the calculation of the lowest order hadronic vacuum polarisation contribution. Therefore, I present a novel lattice QCD calculation of this contribution which would make the discrepancy (if it remains) really compelling in trying to ascertain the possibility of new physics beyond the SM.

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