Improved measurement of the positive-muon lifetime and determination of the fermi constant

D. B. Chitwood; T. I. Banks; M. J. Barnes; S. Battu; R. M. Carey; S. Cheekatmalla; S. M. Clayton; J. Crnkovic; K. M. Crowe; P. T. Debevec; S. Dhamija; W. Earle; A. Gafarov; K. Giovanetti; T. P. Gorringe; F. E. Gray; M. Hance; D. W. Hertzog; M. F. Hare; P. Kammel; B. Kiburg; J. Kunkle; B. Lauss; I. Logashenko; K. R. Lynch; R. McNabb; J. P. Miller; F. Mulhauser; C. J.G. Onderwater; C. S. Özben; Q. Peng; C. C. Polly; S. Rath; B. L. Roberts; V. Tishchenko; G. D. Wait; J. Wasserman; D. M. Webber; P. Winter; P. A. Zołnierczuk

doi:10.1103/PhysRevLett.99.032001

Improved measurement of the positive-muon lifetime and determination of the fermi constant

D. B. Chitwood, T. I. Banks, M. J. Barnes, S. Battu, R. M. Carey, S. Cheekatmalla, S. M. Clayton, J. Crnkovic, K. M. Crowe, P. T. Debevec, S. Dhamija, W. Earle, A. Gafarov, K. Giovanetti, T. P. Gorringe, F. E. Gray, M. Hance, D. W. Hertzog, M. F. Hare, P. KammelB. Kiburg, J. Kunkle, B. Lauss, I. Logashenko, K. R. Lynch, R. McNabb, J. P. Miller, F. Mulhauser, C. J.G. Onderwater, C. S. Özben, Q. Peng, C. C. Polly, S. Rath, B. L. Roberts, V. Tishchenko, G. D. Wait, J. Wasserman, D. M. Webber, P. Winter, P. A. Zołnierczuk

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Abstract

The mean life of the positive muon has been measured to a precision of 11 ppm using a low-energy, pulsed muon beam stopped in a ferromagnetic target, which was surrounded by a scintillator detector array. The result, τμ=2.197013(24)μs, is in excellent agreement with the previous world average. The new world average τμ=2.197019(21)μs determines the Fermi constant GF=1.166371(6)×10-5GeV-2 (5 ppm). Additionally, the precision measurement of the positive-muon lifetime is needed to determine the nucleon pseudoscalar coupling gP.

Original language	English (US)
Article number	032001
Journal	Physical Review Letters
Volume	99
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.99.032001
State	Published - Jul 16 2007
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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Chitwood, D. B., Banks, T. I., Barnes, M. J., Battu, S., Carey, R. M., Cheekatmalla, S., Clayton, S. M., Crnkovic, J., Crowe, K. M., Debevec, P. T., Dhamija, S., Earle, W., Gafarov, A., Giovanetti, K., Gorringe, T. P., Gray, F. E., Hance, M., Hertzog, D. W., Hare, M. F., ... Zołnierczuk, P. A. (2007). Improved measurement of the positive-muon lifetime and determination of the fermi constant. Physical Review Letters, 99(3), Article 032001. https://doi.org/10.1103/PhysRevLett.99.032001

Chitwood, DB, Banks, TI, Barnes, MJ, Battu, S, Carey, RM, Cheekatmalla, S, Clayton, SM, Crnkovic, J, Crowe, KM, Debevec, PT, Dhamija, S, Earle, W, Gafarov, A, Giovanetti, K, Gorringe, TP, Gray, FE, Hance, M, Hertzog, DW, Hare, MF, Kammel, P, Kiburg, B, Kunkle, J, Lauss, B, Logashenko, I, Lynch, KR, McNabb, R, Miller, JP, Mulhauser, F, Onderwater, CJG, Özben, CS, Peng, Q, Polly, CC, Rath, S, Roberts, BL, Tishchenko, V, Wait, GD, Wasserman, J, Webber, DM, Winter, P & Zołnierczuk, PA 2007, 'Improved measurement of the positive-muon lifetime and determination of the fermi constant', Physical Review Letters, vol. 99, no. 3, 032001. https://doi.org/10.1103/PhysRevLett.99.032001

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title = "Improved measurement of the positive-muon lifetime and determination of the fermi constant",

abstract = "The mean life of the positive muon has been measured to a precision of 11 ppm using a low-energy, pulsed muon beam stopped in a ferromagnetic target, which was surrounded by a scintillator detector array. The result, τμ=2.197013(24)μs, is in excellent agreement with the previous world average. The new world average τμ=2.197019(21)μs determines the Fermi constant GF=1.166371(6)×10-5GeV-2 (5 ppm). Additionally, the precision measurement of the positive-muon lifetime is needed to determine the nucleon pseudoscalar coupling gP.",

author = "Chitwood, {D. B.} and Banks, {T. I.} and Barnes, {M. J.} and S. Battu and Carey, {R. M.} and S. Cheekatmalla and Clayton, {S. M.} and J. Crnkovic and Crowe, {K. M.} and Debevec, {P. T.} and S. Dhamija and W. Earle and A. Gafarov and K. Giovanetti and Gorringe, {T. P.} and Gray, {F. E.} and M. Hance and Hertzog, {D. W.} and Hare, {M. F.} and P. Kammel and B. Kiburg and J. Kunkle and B. Lauss and I. Logashenko and Lynch, {K. R.} and R. McNabb and Miller, {J. P.} and F. Mulhauser and Onderwater, {C. J.G.} and {\"O}zben, {C. S.} and Q. Peng and Polly, {C. C.} and S. Rath and Roberts, {B. L.} and V. Tishchenko and Wait, {G. D.} and J. Wasserman and Webber, {D. M.} and P. Winter and Zo{\l}nierczuk, {P. A.}",

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doi = "10.1103/PhysRevLett.99.032001",

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AU - Chitwood, D. B.

AU - Banks, T. I.

AU - Barnes, M. J.

AU - Battu, S.

AU - Carey, R. M.

AU - Cheekatmalla, S.

AU - Clayton, S. M.

AU - Crnkovic, J.

AU - Crowe, K. M.

AU - Debevec, P. T.

AU - Dhamija, S.

AU - Earle, W.

AU - Gafarov, A.

AU - Giovanetti, K.

AU - Gorringe, T. P.

AU - Gray, F. E.

AU - Hance, M.

AU - Hertzog, D. W.

AU - Hare, M. F.

AU - Kammel, P.

AU - Kiburg, B.

AU - Kunkle, J.

AU - Lauss, B.

AU - Logashenko, I.

AU - Lynch, K. R.

AU - McNabb, R.

AU - Miller, J. P.

AU - Mulhauser, F.

AU - Onderwater, C. J.G.

AU - Özben, C. S.

AU - Peng, Q.

AU - Polly, C. C.

AU - Rath, S.

AU - Roberts, B. L.

AU - Tishchenko, V.

AU - Wait, G. D.

AU - Wasserman, J.

AU - Webber, D. M.

AU - Winter, P.

AU - Zołnierczuk, P. A.

PY - 2007/7/16

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N2 - The mean life of the positive muon has been measured to a precision of 11 ppm using a low-energy, pulsed muon beam stopped in a ferromagnetic target, which was surrounded by a scintillator detector array. The result, τμ=2.197013(24)μs, is in excellent agreement with the previous world average. The new world average τμ=2.197019(21)μs determines the Fermi constant GF=1.166371(6)×10-5GeV-2 (5 ppm). Additionally, the precision measurement of the positive-muon lifetime is needed to determine the nucleon pseudoscalar coupling gP.

AB - The mean life of the positive muon has been measured to a precision of 11 ppm using a low-energy, pulsed muon beam stopped in a ferromagnetic target, which was surrounded by a scintillator detector array. The result, τμ=2.197013(24)μs, is in excellent agreement with the previous world average. The new world average τμ=2.197019(21)μs determines the Fermi constant GF=1.166371(6)×10-5GeV-2 (5 ppm). Additionally, the precision measurement of the positive-muon lifetime is needed to determine the nucleon pseudoscalar coupling gP.

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Improved measurement of the positive-muon lifetime and determination of the fermi constant

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