MEG Upgrade Proposal

By A. Baldini, F. Cei, C. Cerri, S. Dussoni, L. Galli, M. Grassi, D. Nicoló, F. Raffaelli, F. Sergiampietri, Giovanni Signorelli and 57 more. 2013

167 citations recorded by the source corpus.

We propose the continuation of the MEG experiment to search for the charged lepton flavour violating decay (cLFV) \mu \to e \gamma, based on an upgrade of the experiment, which aims for a sensitivity enhancement of one order of magnitude compared to the final MEG result, down to the $6 \times 10^{-14}$ level. The key features of this new MEG upgrade are an increased rate capability of all detectors to enable running at the intensity frontier and improved energy, angular and timing resolutions, for both the positron and photon arms of the detector. On the positron-side a new low-mass, single volume, high granularity tracker is envisaged, in combination with a new highly segmented, fast timing counter array, to track positron from a thinner stopping target. The photon-arm, with the largest liquid xenon (LXe) detector in the world, totalling 900 l, will also be improved by increasing the granularity at the incident face, by replacing the current photomultiplier tubes (PMTs) with a larger number of smaller photosensors and optimizing the photosensor layout also on the lateral faces. A new DAQ scheme involving the implementation of a new combined readout board capable of integrating the diverse functions of digitization, trigger capability and splitter functionality into one condensed unit, is also under development. We describe here the status of the MEG experiment, the scientific merits of the upgrade and the experimental methods we plan to use.

Subfields: Nuclear and High Energy Physics, Radiation

View Paper: https://www.semanticscholar.org/paper/58d54960a1f9b740a0bef5094aa3118bd9521099

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Citations in the corpus

Technical design of the phase I Mu3e experiment (2020, unknown): “This channel will be shared with the upgrade version of the MEG experiment – MEG II [14], whose large detector and infrastructure are permanently located in the rear-part of the πE5 area.”
Charged Lepton Flavour Violation: An Experimental and Theoretical Introduction (2017, methodology): “2× 10−13 5× 10−14 [316] MEG II μ → e+e−e+ < 1.”
Search for the lepton flavour violating decay μ+→e+γ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mu ^+ \rightarrow (2016, unknown): “An effort to upgrade the existing MEG detector is currently underway with the goal of achieving an additional improvement in the sensitivity of close to an order of magnitude [40].”
The design of the MEG II experiment (2018, methodology): “ a function of the DAQ time (in weeks). Assuming conservatively 140 DAQ days per year, we can reach a sensitivity of 6 10 14 in three years. The sensitivity has been re59 evaluated since the proposal [86] according to the updated estimations of the expected detector performances, the inclusion of th”
From the Trees to the Forest: A Review of Radiative Neutrino Mass Models (2017, background): “This bound is expected to be improved by about one order of magnitude in the MEG-II upgrade [454].”