https://doi.org/10.1051/epjconf/201817901012
Measuring the leading hadronic contribution to the muon g-2 via the -e elastic scattering.
1
INFN Sezione di Bologna, Via Irnerio, 46 - 40126 Bologna (BO) Italy.
2
INFN Sezione di Pavia, Via Agostino Bassi, 6 - 27100 Pavia (PV) Italy.
a Corresponding authorumberto.marconi@bo.infn.it
b Corresponding authorfulvio.piccinini@pv.infn.it
Published online: 23 May 2018
The precision measurement of the anomalous magnetic moment g-2 of the muon presently exhibits a 3.5 σ deviation between theory and experiments. In the next few years the anomalous magnetic moment will be measured to higher precisions at Fermilab and J-PARC. The theoretical prediction can be improved by reducing the uncertainty on the leading hadronic correction HLO μ to the g-2. Here we present a novel approach to determine aHLO μ with space-like data, by means of precise measurement of the hadronic shift of the effective electromagnetic coupling α exploiting the elastic scattering of 150 GeV muons (currently available at CERN North area) on atomic electrons of a low-Z target. The direct measurement of aHLO μ in the space-like region will provide a new independent determination competitive with the time-like dispersive approach, and will consolidate the theoretical prediction of the muon g-2 in the Standard Model. It will allow therefore a firmer interpretation of the measurements of the future muon g-2 experiments at Fermilab and J-PARC
© 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/).
