تقرير
Measuring the leading hadronic contribution to the muon g-2 via $\mu\,e$ scattering
| العنوان: | Measuring the leading hadronic contribution to the muon g-2 via $\mu\,e$ scattering |
|---|---|
| المؤلفون: | Abbiendi, G., Calame, C. M. Carloni, Marconi, U., Matteuzzi, C., Montagna, G., Nicrosini, O., Passera, M., Piccinini, F., Tenchini, R., Trentadue, L., Venanzoni, G. |
| سنة النشر: | 2016 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Experiment, High Energy Physics - Phenomenology |
| الوصف: | 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. Comment: 8 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1140/epjc/s10052-017-4633-z |
| URL الوصول: | http://arxiv.org/abs/1609.08987 |
| رقم الأكسشن: | edsarx.1609.08987 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1140/epjc/s10052-017-4633-z |
|---|