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Performance test of a lead-glass counter for the J-PARC E36 experiment.
- Source :
-
Nuclear Instruments & Methods in Physics Research Section A . Apr2015, Vol. 779, p13-17. 5p. - Publication Year :
- 2015
-
Abstract
- The J-PARC E36 experiment will search for a violation of lepton universality by a precise measurement of the ratio of the kaon decay widths R K = Γ ( K + → e + ν ) / Γ ( K + → μ + ν ) . Charged particles will be identified by the combination of three independent systems: a lead-glass Cherenkov counter, an aerogel Cherenkov counter, and a time-of-flight measurement. The performance of the lead-glass Cherenkov counter was investigated with e + , μ + , and π + beams in the relevant momentum region from the K + decays. By using a polyethylene degrader to slow down the beam momentum in front of the lead-glass block, we succeeded in reducing the muon mis-identification probability down to 5% while maintaining a high e + detection efficiency of 98%. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01689002
- Volume :
- 779
- Database :
- Academic Search Index
- Journal :
- Nuclear Instruments & Methods in Physics Research Section A
- Publication Type :
- Academic Journal
- Accession number :
- 101138476
- Full Text :
- https://doi.org/10.1016/j.nima.2015.01.044