3 years ago

Design, status and perspective of the Mu2e crystal calorimeter.

F. Colao, I. Sarra, F. Happacher, T. Miyashita, J. Budagov, R. Y. Zhu, M. Martini, B. Echenard, M. Cordelli, G. Pezzullo, G. Tassielli, V. Glagolev, E. Danè, V. Baranov, Yu. Davydov, F. Raffaelli, F. Cervelli, F. Spinella, D. Hitlin, S. Di Falco, S. Donati, F. Porter, L. Morescalchi, E. Pedreschi, R. Donghia, E. Diociaiuti, V. Tereshchenko, S. Miscetti, S. Giovannella, G. Corradi, N. Atanov, P. Murat, A. Saputi, M. Ricci, F. Grancagnolo

The Mu2e experiment at Fermilab will search for the charged lepton flavor violating process of neutrino-less $\mu \to e$ coherent conversion in the field of an aluminum nucleus. Mu2e will reach a single event sensitivity of about $2.5\cdot 10^{-17}$ that corresponds to four orders of magnitude improvements with respect to the current best limit. The detector system consists of a straw tube tracker and a crystal calorimeter made of undoped CsI coupled with Silicon Photomultipliers. The calorimeter was designed to be operable in a harsh environment where about 10 krad/year will be delivered in the hottest region and work in presence of 1 T magnetic field. The calorimeter role is to perform $\mu$/e separation to suppress cosmic muons mimiking the signal, while providing a high level trigger and a seeding the track search in the tracker. In this paper we present the calorimeter design and the latest R$\&$D results.

Publisher URL: http://arxiv.org/abs/1801.03159

DOI: arXiv:1801.03159v1

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