Precise muon lifetime measurement at the RIKEN-RAL muon facility and prospects at a high intense muon source

D. Tomono; S. N. Nakamura; Y. Matsuda; M. Iwasaki; G. Mason; K. Ishida; T. Matsuzaki; I. Watanabe; S. Sakamoto; K. Nagamine

doi:10.1016/S0168-9002(03)00698-3

Precise muon lifetime measurement at the RIKEN-RAL muon facility and prospects at a high intense muon source

D. Tomono, S. N. Nakamura, Y. Matsuda, M. Iwasaki, G. Mason, K. Ishida, T. Matsuzaki, I. Watanabe, S. Sakamoto, K. Nagamine

SCI - Physics

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

Fermi coupling constant (G_F) which is one of the most important parameter in the Standard Model, can be determined by measuring the positive muon lifetime (τ_μ+). However, its accuracy has not been improved for 15 years. We proposed a new method at the RIKEN-RAL muon facility, called 'multi-decay per one time window' in order to realize a higher event rate with a multi-segmented detector to reduce the pile-up effect. We accumulated ∼10¹⁰ muon decay events and the analysis is in progress to achieve 10 ppm accuracy. The exponential decay law was tested for the muon decay at the same time and the preliminary upper-limit was obtained. Future lifetime measurement with the high intense muon source is also discussed.

Original language	English
Pages (from-to)	283-286
Number of pages	4
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	503
Issue number	1-2
DOIs	https://doi.org/10.1016/S0168-9002(03)00698-3
Publication status	Published - 2003 May 1
Event	Proceedings of the 3rd international Workshop on Neutrino Fact , NuFACT 2001 - Ibaraki, Japan Duration: 2001 May 1 → …

Keywords

Exponential decay law
Multi-decay
Muon lifetime
Standard model

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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10.1016/S0168-9002(03)00698-3

Cite this

Tomono, D., Nakamura, S. N., Matsuda, Y., Iwasaki, M., Mason, G., Ishida, K., Matsuzaki, T., Watanabe, I., Sakamoto, S., & Nagamine, K. (2003). Precise muon lifetime measurement at the RIKEN-RAL muon facility and prospects at a high intense muon source. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 503(1-2), 283-286. https://doi.org/10.1016/S0168-9002(03)00698-3

Precise muon lifetime measurement at the RIKEN-RAL muon facility and prospects at a high intense muon source. / Tomono, D.; Nakamura, S. N.; Matsuda, Y.; Iwasaki, M.; Mason, G.; Ishida, K.; Matsuzaki, T.; Watanabe, I.; Sakamoto, S.; Nagamine, K.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 503, No. 1-2, 01.05.2003, p. 283-286.

Research output: Contribution to journal › Conference article › peer-review

Tomono, D, Nakamura, SN, Matsuda, Y, Iwasaki, M, Mason, G, Ishida, K, Matsuzaki, T, Watanabe, I, Sakamoto, S & Nagamine, K 2003, 'Precise muon lifetime measurement at the RIKEN-RAL muon facility and prospects at a high intense muon source', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 503, no. 1-2, pp. 283-286. https://doi.org/10.1016/S0168-9002(03)00698-3

Tomono D, Nakamura SN, Matsuda Y, Iwasaki M, Mason G, Ishida K et al. Precise muon lifetime measurement at the RIKEN-RAL muon facility and prospects at a high intense muon source. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2003 May 1;503(1-2):283-286. https://doi.org/10.1016/S0168-9002(03)00698-3

Tomono, D. ; Nakamura, S. N. ; Matsuda, Y. ; Iwasaki, M. ; Mason, G. ; Ishida, K. ; Matsuzaki, T. ; Watanabe, I. ; Sakamoto, S. ; Nagamine, K. / Precise muon lifetime measurement at the RIKEN-RAL muon facility and prospects at a high intense muon source. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2003 ; Vol. 503, No. 1-2. pp. 283-286.

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abstract = "Fermi coupling constant (GF) which is one of the most important parameter in the Standard Model, can be determined by measuring the positive muon lifetime (τμ+). However, its accuracy has not been improved for 15 years. We proposed a new method at the RIKEN-RAL muon facility, called 'multi-decay per one time window' in order to realize a higher event rate with a multi-segmented detector to reduce the pile-up effect. We accumulated ∼1010 muon decay events and the analysis is in progress to achieve 10 ppm accuracy. The exponential decay law was tested for the muon decay at the same time and the preliminary upper-limit was obtained. Future lifetime measurement with the high intense muon source is also discussed.",

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author = "D. Tomono and Nakamura, {S. N.} and Y. Matsuda and M. Iwasaki and G. Mason and K. Ishida and T. Matsuzaki and I. Watanabe and S. Sakamoto and K. Nagamine",

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AU - Tomono, D.

AU - Nakamura, S. N.

AU - Matsuda, Y.

AU - Iwasaki, M.

AU - Mason, G.

AU - Ishida, K.

AU - Matsuzaki, T.

AU - Watanabe, I.

AU - Sakamoto, S.

AU - Nagamine, K.

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N2 - Fermi coupling constant (GF) which is one of the most important parameter in the Standard Model, can be determined by measuring the positive muon lifetime (τμ+). However, its accuracy has not been improved for 15 years. We proposed a new method at the RIKEN-RAL muon facility, called 'multi-decay per one time window' in order to realize a higher event rate with a multi-segmented detector to reduce the pile-up effect. We accumulated ∼1010 muon decay events and the analysis is in progress to achieve 10 ppm accuracy. The exponential decay law was tested for the muon decay at the same time and the preliminary upper-limit was obtained. Future lifetime measurement with the high intense muon source is also discussed.

AB - Fermi coupling constant (GF) which is one of the most important parameter in the Standard Model, can be determined by measuring the positive muon lifetime (τμ+). However, its accuracy has not been improved for 15 years. We proposed a new method at the RIKEN-RAL muon facility, called 'multi-decay per one time window' in order to realize a higher event rate with a multi-segmented detector to reduce the pile-up effect. We accumulated ∼1010 muon decay events and the analysis is in progress to achieve 10 ppm accuracy. The exponential decay law was tested for the muon decay at the same time and the preliminary upper-limit was obtained. Future lifetime measurement with the high intense muon source is also discussed.

KW - Exponential decay law

KW - Multi-decay

KW - Muon lifetime

KW - Standard model

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SP - 283

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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

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T2 - Proceedings of the 3rd international Workshop on Neutrino Fact , NuFACT 2001

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Precise muon lifetime measurement at the RIKEN-RAL muon facility and prospects at a high intense muon source

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