A new experimental method to search for T-violation using a sequential CeF3 scintillating calorimeter

S. Shimizu; K. Horie; Y. Igarashi; H. Ito; K. Kamada; S. Kimura; A. Kobayashi; M. Mihara; A. Yamaji; A. Yoshikawa

doi:10.1016/j.nima.2019.162587

A new experimental method to search for T-violation using a sequential CeF₃ scintillating calorimeter

S. Shimizu, K. Horie, Y. Igarashi, H. Ito, K. Kamada, S. Kimura, A. Kobayashi, M. Mihara, A. Yamaji, A. Yoshikawa

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

A new experimental method to search for T-violating transverse muon polarization (P_T) in the K⁺→π⁰μ⁺ν (K_μ3) decay is proposed. In this new experiment, the measurements of the μ⁺ momentum vector, the π⁰ momentum vector, and the μ⁺ polarization will be performed by the same electro-magnetic calorimeter. One of key issues is the choice of a scintillation material which can preserve the μ⁺ spin polarization for several μ⁺ lifetimes. A test experiment to measure the residual μ⁺ polarization in a CeF₃ scintillating crystal was performed at J-PARC Material and Life Science Facility (MLF). We concluded that the residual μ⁺ polarization in CeF₃ is high enough to perform the new T-violation experiment.

Original language	English
Article number	162587
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	945
DOIs	https://doi.org/10.1016/j.nima.2019.162587
Publication status	Published - 2019 Nov 21

Keywords

Kaon decay
Muon spin polarization
Muon spin preservation in scintillating materials

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

Access to Document

10.1016/j.nima.2019.162587

Cite this

Shimizu, S., Horie, K., Igarashi, Y., Ito, H., Kamada, K., Kimura, S., Kobayashi, A., Mihara, M., Yamaji, A., & Yoshikawa, A. (2019). A new experimental method to search for T-violation using a sequential CeF₃ scintillating calorimeter. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 945, [162587]. https://doi.org/10.1016/j.nima.2019.162587

A new experimental method to search for T-violation using a sequential CeF₃ scintillating calorimeter. / Shimizu, S.; Horie, K.; Igarashi, Y. et al.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 945, 162587, 21.11.2019.

Research output: Contribution to journal › Article › peer-review

Shimizu, S, Horie, K, Igarashi, Y, Ito, H, Kamada, K, Kimura, S, Kobayashi, A, Mihara, M, Yamaji, A & Yoshikawa, A 2019, 'A new experimental method to search for T-violation using a sequential CeF₃ scintillating calorimeter', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 945, 162587. https://doi.org/10.1016/j.nima.2019.162587

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title = "A new experimental method to search for T-violation using a sequential CeF3 scintillating calorimeter",

abstract = "A new experimental method to search for T-violating transverse muon polarization (PT) in the K+→π0μ+ν (Kμ3) decay is proposed. In this new experiment, the measurements of the μ+ momentum vector, the π0 momentum vector, and the μ+ polarization will be performed by the same electro-magnetic calorimeter. One of key issues is the choice of a scintillation material which can preserve the μ+ spin polarization for several μ+ lifetimes. A test experiment to measure the residual μ+ polarization in a CeF3 scintillating crystal was performed at J-PARC Material and Life Science Facility (MLF). We concluded that the residual μ+ polarization in CeF3 is high enough to perform the new T-violation experiment.",

keywords = "Kaon decay, Muon spin polarization, Muon spin preservation in scintillating materials",

author = "S. Shimizu and K. Horie and Y. Igarashi and H. Ito and K. Kamada and S. Kimura and A. Kobayashi and M. Mihara and A. Yamaji and A. Yoshikawa",

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AU - Shimizu, S.

AU - Horie, K.

AU - Igarashi, Y.

AU - Ito, H.

AU - Kamada, K.

AU - Kimura, S.

AU - Kobayashi, A.

AU - Mihara, M.

AU - Yamaji, A.

AU - Yoshikawa, A.

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AB - A new experimental method to search for T-violating transverse muon polarization (PT) in the K+→π0μ+ν (Kμ3) decay is proposed. In this new experiment, the measurements of the μ+ momentum vector, the π0 momentum vector, and the μ+ polarization will be performed by the same electro-magnetic calorimeter. One of key issues is the choice of a scintillation material which can preserve the μ+ spin polarization for several μ+ lifetimes. A test experiment to measure the residual μ+ polarization in a CeF3 scintillating crystal was performed at J-PARC Material and Life Science Facility (MLF). We concluded that the residual μ+ polarization in CeF3 is high enough to perform the new T-violation experiment.

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