Progress status for the Mu2e calorimeter system

16th International Conference on Calorimetry in High Energy Physics

Pezzullo, Gianantonio^1,2 ; Budagov, J.^3 ; Carosi, R.^2 ; Cervelli, F.^1,2 ; Cheng, C.^4 ; Cordelli, M.^5 ; Corradi, G.^5 ; Davydov, Yu^3 ; Echenard, B.^4 ; Giovannella, S.^5 ; Glagolev, V.^3 ; Happacher, F.^5 ; Hitlin, D.^4 ; Luca, A.^5 ; Martini, M.^4 ; Miscetti, S.^5 ; Murat, P.^7 ; Ongmonkolkul, P.^4 ; Porter, F.^4 ; Saputi, A.^5 ; Sarra, I.^5 ; Spinella, F.^2 ; Stomaci, V.^5 ; Tassielli, G.^6

Departement of Physics, University of Pisa, Largo B. Pontecorvo 3, Pisa, Italy^1

INFN Sezione di Pisa, Largo B. Pontecorvo 3, Pisa, Italy^2

Joint Institute for Nuclear Research, Joliot-Curie 6, Dubna, Russia^3

Departement of Physics, California Institute of Technology, 1200 E California Blvd, Pasadena (CA), United States^4

INFN Laboratori Nazionali di Frascati, via Enrico Femri 40, Frascati, Italy^5

INFN Sezione di Lecce, Via Arnesano 73100, Lecce, Italy^6

Fermi National Accelerator Laboratory, Main Entrance Rd, Batavia (IL), United States^7

关键词: Axial magnetic field;    Charged leptons;    Conversion electrons;    Energy resolutions;    Experimental test;    High-level triggers;    Particle identifications;    Simulation studies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/587/1/012047/pdf
DOI  :  10.1088/1742-6596/587/1/012047

来源: IOP

【 摘 要 】

The Mu2e experiment at FNAL aims to measure the charged-lepton flavor violating neutrinoless conversion of a negative muon into an electron. The conversion results in a monochromatic electron with an energy slightly below the muon rest mass (104.97 MeV). The calorimeter should confirm that the candidates reconstructed by the extremely precise tracker system are indeed conversion electrons while performing a powerful μ/e particle identification. Moreover, it should also provide a high level trigger for the experiment independently from the tracker system. The calorimeter should also be able to keep functionality in an environment where the background delivers a dose of ∼ 10 krad/year in the hottest area and to work in the presence of 1 T axial magnetic field. These requirements translate in the design of a calorimeter with large acceptance, good energy resolution O(5%) and a reasonable position (time) resolution of ∼ 2crystals of 20 cm length. Each crystal is readout by two large area APD's. In this paper, we summarize the experimental tests done so far as well as the simulation studies in the Mu2e environment.