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Type: Conference paper
Title: Anomalous magnetic moment of the muon with dynamical QCD+QED
Author: Westin, A.
Horsley, R.
Kamleh, W.
Nakamura, Y.
Perlt, H.
Rakow, P.
Schierholz, G.
Schiller, A.
Stüben, H.
Young, R.
Zanotti, J.
Citation: PoS - Proceedings of Science, 2018, vol.334, pp.136-1-136-7
Publisher: SISSA
Issue Date: 2018
Series/Report no.: Proceedings of Science; 334
ISSN: 1824-8039
Conference Name: 36th Annual International Symposium on Lattice Field Theory (LATTICE) (22 Jul 2018 - 28 Jul 2018 : Michigan State University, East Lansing, USA)
Statement of
J. Zanotti, A. Westin, R. Horsley, W. Kamleh, Y. Nakamura, H. Perlt, P. Rakow, G. Schierholz, A. Schiller, H. Stuben, R. Young on behalf of CSSM, QCDSF, UKQCD Collaboration
Abstract: The current 3.5σ discrepancy between experimental and Standard Model determinations of the anomalous magnetic moment of the muon aμ=(g−2)/2 can only be extended to the discovery 5σ regime through a reduction of both experimental and theoretical uncertainties. On the theory side, this means a determination of the hadronic vacuum polarisation (HVP) contribution to better than 0.5\%, a level of precision that demands the inclusion of QCD + QED effects to properly understand how the behaviour of quarks are modified when their electric charges are turned on. The QCDSF collaboration has generated an ensemble of configurations with dynamical QCD and QED fields with the specific aim of studying flavour breaking effects arising from differences in the quark masses and charges in physical quantities. Here we study these effects in a calculation of HVP around the SU(3) symmetric point. Furthermore, by performing partially-quenched simulations we are able to cover a larger range of quark masses and charges on these configurations and then fit the results to an SU(3) flavour breaking expansion. Subsequently, this allows for an extrapolation to the physical point.
Rights: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
DOI: 10.22323/1.334.0136
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