YOSHIDA , K.

A new timing detector has been developed to measure ∼50 MeV/c positrons with a time resolution of σt≃30ps in the MEG II experiment. The detector are segmented into 512 scintillation counters, each of which consists of 120×(40or50)×5mm3 size BC-422 and two arrays of six AdvanSiD silicon photomultipliers. The single-counter resolutions are...

The MEG experiment is now being upgraded to search for the charged lepton flavor violating decay μ+ → e+γ with an improved branching ratio sensitivity, 5 × 10-14. We are developing a new Timing Counter to precisely measure the timing of the decay positrons under the high rate environment. The Timing Counter consists of 512 counters and each...

The development of a Timing Counter detector with a resolution in the range of ≈ 30 ps will be presented. The detector was designed for the upgrade of the MEG II experiment looking for the μ+→ e+γ decay with an improved sensitivity of one order of magnitude with respect to the previous MEG setup. In this paper the design of the TC single pixel...

The development of a Timing Counter detector designed for the MEGII upgrade of the MEG experiment, which strives to improve the sensitivity on theμ+→e+γ decay of an order of magnitude, is presented. It is based on two sets of counters (sectors) arranged on a semi-cylindrical structure; each sector consists of 256 counters. Each counter consists...

The MEGII Timing Counter will measure the positron time of arrival with a resolution of ~ 30 ps relying on two arrays of scintillator pixels read out by 6144 Silicon Photomultipliers (SiPMs) from AdvanSiD. They are characterised, measuring their breakdown voltage, to assure that the gains of the SiPMs of each pixel are as uniform as possible,...

The MEG II experiment, located at the Paul Scherrer Institut (PSI) in Switzerland, is the successor to the MEG experiment, which completed data taking in 2013. MEG II started fully operational data taking in 2021, with the goal of improving the sensitivity of the mu+-> e+gamma\documentclass[12pt]{minimal} \usepackage{amsmath}...

The MEG II experiment, based at the Paul Scherrer Institut in Switzerland, reports the result of a search for the decay mu(+)-> e(+)gamma from data taken in the first physics run in 2021. No excess of events over the expected background is observed, yielding an upper limit on the branching ratio of B (mu(+)-> e(+)gamma) <7.5x10(-13) (90% CL)....

The MEG II experiment, located at the Paul Scherrer Institut (PSI) in Switzerland, is the successor to the MEG experiment, which completed data taking in 2013. MEG II started fully operational data taking in 2021, with the goal of improving the sensitivity of the mu+-> e+gamma\documentclass[12pt]{minimal} \usepackage{amsmath}...