%0 Generic %1 abbiendi2016measuring %A Abbiendi, G. %A Calame, C. M. Carloni %A Marconi, U. %A Matteuzzi, C. %A Montagna, G. %A Nicrosini, O. %A Passera, M. %A Piccinini, F. %A Tenchini, R. %A Trentadue, L. %A Venanzoni, G. %D 2016 %K alphaqed g-2 %R 10.1140/epjc/s10052-017-4633-z %T Measuring the leading hadronic contribution to the muon g-2 via $\mu\,e$ scattering %U http://arxiv.org/abs/1609.08987 %X We propose a new experiment to measure the running of the fine-structure constant in the space-like region by scattering high-energy muons on atomic electrons of a low-Z target through the process $e e$. The differential cross section of this process, measured as a function of the squared momentum transfer $t=q^2<0$, provides direct sensitivity to the leading-order hadronic contribution to the muon anomaly $a^HLO_\mu$. By using a muon beam of 150 GeV, with an average rate of $\sim1.310^7$ muon/s, currently available at the CERN North Area, a statistical uncertainty of $0.3\%$ can be achieved on $a^HLO_\mu$ after two years of data taking. This direct measurement of $a^HLO_\mu$ will provide an independent determination, competitive with the time-like dispersive approach, and consolidate the theoretical prediction for 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.

@misc{abbiendi2016measuring, abstract = {We propose a new experiment to measure the running of the fine-structure constant in the space-like region by scattering high-energy muons on atomic electrons of a low-Z target through the process $\mu e \to \mu e$. The differential cross section of this process, measured as a function of the squared momentum transfer $t=q^2<0$, provides direct sensitivity to the leading-order hadronic contribution to the muon anomaly $a^{\rm{HLO}}_{\mu}$. By using a muon beam of 150 GeV, with an average rate of $\sim1.3\times 10^7$ muon/s, currently available at the CERN North Area, a statistical uncertainty of $\sim 0.3\%$ can be achieved on $a^{\rm{HLO}}_{\mu}$ after two years of data taking. This direct measurement of $a^{\rm{HLO}}_{\mu}$ will provide an independent determination, competitive with the time-like dispersive approach, and consolidate the theoretical prediction for 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.}, added-at = {2020-03-20T16:35:09.000+0100}, author = {Abbiendi, G. and Calame, C. M. Carloni and Marconi, U. and Matteuzzi, C. and Montagna, G. and Nicrosini, O. and Passera, M. and Piccinini, F. and Tenchini, R. and Trentadue, L. and Venanzoni, G.}, biburl = {https://www.bibsonomy.org/bibtex/2b11395059a2ce388956cd6b77078fd43/cmcneile}, description = {Measuring the leading hadronic contribution to the muon g-2 via $\mu\,e$ scattering}, doi = {10.1140/epjc/s10052-017-4633-z}, interhash = {f5337d3518f38313a8970ad06c0b94e2}, intrahash = {b11395059a2ce388956cd6b77078fd43}, keywords = {alphaqed g-2}, note = {cite arxiv:1609.08987Comment: 8 pages, 4 figures}, timestamp = {2020-03-20T16:35:09.000+0100}, title = {Measuring the leading hadronic contribution to the muon g-2 via $\mu\,e$ scattering}, url = {http://arxiv.org/abs/1609.08987}, year = 2016 }