TY - JOUR
T1 - Performance study of a prototype pure CsI calorimeter for the KOTO experiment
AU - Iwai, E.
AU - Lee, J. W.
AU - Masuda, T.
AU - McFarland, D.
AU - Nakaya, Y.
AU - Ri, Y. D.
AU - Sato, K.
AU - Shiomi, K.
AU - Sugiyama, Y.
AU - Tajima, Y.
AU - Tecchio, M.
AU - Togawa, M.
AU - Tung, Y. C.
AU - Yamanaka, T.
N1 - Funding Information:
We would like to express our gratitude to all members of the Research Center for Electron Photon Science for their support at the beam test. This work was supported by MEXT KAKENHI Grant no. 18071006 , and the Japan/US Cooperation Program . Some of the authors were supported in part by Grant-in-Aid for JSPS Fellows from the Japan Society for the Promotion of Science .
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/6/21
Y1 - 2015/6/21
N2 - The performance of the CsI electromagnetic calorimeter to be used for the J-PARC E14 KOTO experiment for a rare decay KL → π0ν ν ¯ was studied by using a positron beam from an accelerator. The energy, timing, and position resolutions for energies up to 800 MeV were measured. We also developed a new method to reconstruct the incident angle of photons based on the shower shape recorded with the calorimeter, and evaluated the method to suppress possible backgrounds for KL → π0ν ν ¯ decay signals.
AB - The performance of the CsI electromagnetic calorimeter to be used for the J-PARC E14 KOTO experiment for a rare decay KL → π0ν ν ¯ was studied by using a positron beam from an accelerator. The energy, timing, and position resolutions for energies up to 800 MeV were measured. We also developed a new method to reconstruct the incident angle of photons based on the shower shape recorded with the calorimeter, and evaluated the method to suppress possible backgrounds for KL → π0ν ν ¯ decay signals.
KW - Electromagnetic calorimeter
KW - K → πν ν ¯
KW - KOTO experiment
KW - Pure CsI
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U2 - 10.1016/j.nima.2015.02.046
DO - 10.1016/j.nima.2015.02.046
M3 - Article
AN - SCOPUS:84926431550
VL - 786
SP - 135
EP - 141
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
ER -