Speaker
Dr
Umberto Marconi
(INFN)
Description
The MUonE experiment aims to measure with very high-precision the hadronic contribution to the running of alpha $\Delta\alpha_{had}(t)$, for space-like transferred momenta $t = q^2 < 0$. This measurement has to be performed by means the elastic scattering of high-energetic muons (160 GeV) on electrons target at rest. The precise knowledge of $\Delta\alpha_{had}(t)$ will allow to calculate the Leading Order Hadronic contribution $a_{\mu}^{HLO}$ to the muon g-2, by means of the dispersive technique, with an estimated precision comparable to the time-like traditional approach. MUonE is meant therefore as a new, complementary approach to $a_{\mu}^{HLO}$. To achieve the required luminosity MUonE plans to exploit the high-intensity muon beam M2 at CERN, with an expected muon rate of about 70 MHz, and low Z material targets. The envisaged detector is segmented in about 50 identical modules, each equipped with a Beryllium 1cm thick target element and 3 to 4 silicon strip tracking planes. The module length is set to 0.5m, with transverse dimensions of $10\times10$cm$^2$, in order to get the required tracking angular resolution and the geometrical acceptance. MUonE will be equipped with state of art available detector technology. The detector is being optimized to select suitable tracking elements, to define the trigger strategy and design the DAQ system. Detailed simulation studies based on GEANT4 and fast MC are ongoing to develop the analysis strategy in the LO and NLO approximations.
MUonE has been proposed to CERN in the context of the Physics Beyond Collider initiative.
The plan is to be ready for data taking, with a full scale prototype, already at the restart of LHC after the LS2.
I will report on the MUonE project status and plans.
Summary
The MUonE experiment aims to measure with very high-precision the hadronic contribution to the running of alpha $\Delta\alpha_{had}(t)$, for space-like transferred momenta $t = q^2 < 0$. This measurement has to be performed by means the elastic scattering of high-energetic muons (160 GeV) on electrons target at rest. The precise knowledge of $\Delta\alpha_{had}(t)$ will allow to calculate the Leading Order Hadronic contribution $a_{\mu}^{HLO}$ to the muon g-2, by means of the dispersive technique, with an estimated precision comparable to the time-like traditional approach.
Primary author
Dr
Umberto Marconi
(INFN)
