https://doi.org/10.1051/epjconf/201817506010
Pion mass dependence of the HVP contribution to muon g – 2
1
Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94132, USA
2
Department of Mathematics and Statistics, York University, Toronto, ON Canada M3J 1P3
3
CSSM, University of Adelaide, Adelaide, SA 5005 Australia
4
Dept. of Physics and IFAE-BIST, Univ. Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain
* Speaker, e-mail: maarten@sfsu.edu
Published online: 26 March 2018
One of the systematic errors in some of the current lattice computations of the HVP contribution to the muon anomalous magnetic moment g – 2 is that associated with the extrapolation to the physical pion mass. We investigate this extrapolation assuming lattice pion masses in the range of 220 to 440 MeV with the help of two-loop chiral perturbation theory, and find that such an extrapolation is unlikely to lead to control of this systematic error at the 1% level. This remains true even if various proposed tricks to improve the chiral extrapolation are taken into account.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
