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Measurement of the Branching Ratio of Klong to pi0 nu nubar

abstract: A search for Klong to pi0 nu nubar was performed on the initial Physics data taken by the KOTO collaboration by the 30-GeV proton synchrotron at JPARC, located in Tokai, Japan. The detector used in the experiment is an upgraded version of the E391 detector, KOTO's predecessor experiment performed at KEK. The analysis was performed on 2.49 E+11 ± (0.91%)stat ± (2.50%)syst kaon decays. The analysis uses Klong to 3pi0, Klong to 2pi0, and Klong to 2 gamma; for normalization and Monte Carlo validation. Based on my independent analysis, the single event sensitivity was determined to be 1.31 E-8 ± (1.22%)stat ± (7.12%)syst, comparable with the E391 result. An upper limit of 5.12 E-8 was measured for the Klong to pi0 nu nubar branching ratio at a 90% confidence level. / Dissertation/Thesis / Doctoral Dissertation Physics 2015

Identiferoai:union.ndltd.org:asu.edu/item:29738
Date January 2015
ContributorsMcFarland, Duncan Alexander (Author), Comfort, Joseph R (Advisor), Alarcon, Ricardo O (Committee member), Dugger, Michael R (Committee member), Lunardini, Cecilia (Committee member), Arizona State University (Publisher)
Source SetsArizona State University
LanguageEnglish
Detected LanguageEnglish
TypeDoctoral Dissertation
Format162 pages
Rightshttp://rightsstatements.org/vocab/InC/1.0/, All Rights Reserved

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