Apparatus for a search for T-violating muon polarization in stopped-kaon decays

J. A. Macdonald, M. Abe, M. Aoki, I. Arai, Y. Asano, T. Baker, M. Blecher, M. D. Chapman, P. Depommier, P. Gumplinger, M. Hasinoff, R. Henderson, K. Horie, Y. Igarashi, T. Ikeda, J. Imazato, A. P. Ivashkin, A. Kaga, J. H. Kang, M. M. KhabibullinA. N. Khotjantsev, E. J. Kim, K. U. Kim, Y. G. Kudenko, Y. Kuno, J. M. Lee, K. S. Lee, G. Y. Lim, D. R. Marlow, C. R. Mindas, O. V. Mineev, C. Rangacharyulu, S. Sekikawa, K. Shibata, H. M. Shimizu, S. Shimizu, Y. M. Shin, Y. H. Shin, K. S. Sim, A. Suzuki, T. Tashiro, A. Watanabe, D. Wright, C. H. Yim, T. Yokoi

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


The detector built at KEK to search for T-violating transverse muon polarization in K+→π0μ+νμ(K μ3) decay of stopped kaons is described. Sensitivity to the transverse polarization component is obtained from reconstruction of the decay plane by tracking the μ+ through a toroidal spectrometer and detecting the π0 in a segmented CsI(Tl) photon calorimeter. The muon polarization was obtained from the decay positron asymmetry of muons stopped in a polarimeter. The detector included features which minimized systematic errors while maintaining high acceptance.

Original languageEnglish
Pages (from-to)60-91
Number of pages32
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1-2
Publication statusPublished - 2003 Jun 21

Bibliographical note

Funding Information:
This work was supported in Japan by a Grant-in-Aid from the Ministry of Education, Science, Sports and Culture, and by JSPS; in Russia by the Ministry of Science and Technology, and by the Russian Foundation for Basic Research; in Canada by NSERC and IPP, and by infrastructure of TRIUMF provided under its NRC contribution; in Korea by BSRI-MOE and KOSEF; in the USA by NSF and DOE.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation


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