A liquid hydrogen target to fully characterize the new MEG II liquid xenon calorimeter

B. Vitali,A. Papa, A.M. Baldini, H. Benmansour, S. Bianucci,F. Cei,M. Chiappini,G. Chiarello,G. Dal Maso, M. Francesconi, L. Galli, M. Grassi,D.N. Grigoriev, M. Hildebrandt, M. Meuwly,D. Nicolò, F. Raffaelli, P. Schwendimann,G. Signorelli,A. Venturini

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment（2023）

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摘要

The MEG II experiment aims to improve the sensitivity to μ+→e+γ down to 6×10−14, surpassing the 4.2×10−13 UL by MEG. To achieve this sensitivity the detector performances need to be assessed and monitored via dedicated calibrations. To calibrate the Liquid Xenon Calorimeter near the signal energy (52.8 MeV), photons are produced through the Charge EXchange (CEX) process π−p→nπ0(→γγ). Here we present the liquid Hydrogen target used for the CEX run 2021, during the first MEG II physics run.

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关键词

MEG II,Liquid Xe calorimeter,Calibration,Charge EXchange,Liquid hydrogen

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