Radiative muon capture on hydrogen and the induced pseudoscalar coupling constant

M. D. Hasinoff; S. Ahmad; D. S. Armstrong; G. Azuelos; P. Bergbusch; W. Bertl; M. Blecher; C. Q. Chen; P. Depommier; B. C. Doyle; T. Von Egidy; T. P. Gorringe; P. Gumplinger; D. C. Healey; G. Jonkmans; A. J. Larabee; J. A. Macdonald; S. C. McDonald; M. Munro; J. M. Poutissou; R. Poutissou; B. C. Robertson; E. Saettler; D. G. Sample; C. Sigler; G. N. Taylor; D. H. Wright; N. S. Zhang

Radiative muon capture on hydrogen and the induced pseudoscalar coupling constant

M. D. Hasinoff
, S. Ahmad
, D. S. Armstrong
, G. Azuelos
, P. Bergbusch
, W. Bertl
, M. Blecher
, C. Q. Chen
, P. Depommier
, B. C. Doyle
, T. Von Egidy
, T. P. Gorringe
, P. Gumplinger
, D. C. Healey
, G. Jonkmans
, A. J. Larabee
, J. A. Macdonald
, S. C. McDonald
, M. Munro
, J. M. Poutissou

R. Poutissou, B. C. Robertson, E. Saettler, D. G. Sample, C. Sigler, G. N. Taylor, D. H. Wright, N. S. Zhang

Chair of Physics I

University of British Columbia
University of Tokyo
College of William and Mary
TRIUMF
Université de Montréal
Paul Scherrer Institut
Virginia Polytechnic Institute and State University
University of Kentucky
University of Melbourne
Queen's University

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

Abstract

The first observation of the elementary process μ^-p → νμγ is reported. The muons were stopped in a purified liquid hydrogen target and captured mainly on the ortho on the ortho pμp molecule. The photons were converted to e⁺e^- pairs which were analyzed in a medium-resolution high-acceptance magnetic spectrometer. This reaction is particularly sensitive to the pseudoscalar coupling constant, gp, which was found to be: g_p(q² = -0.88m_μ²) = (10.0 ± 0.9 ± 0.3) • g_a(0). This value of g_p, determined from the photon energy spectrum using a perturbation theory calculation based on tree-level Feynman diagrams, is ∼ 1.5 times the theoretical value, (6.70 ± 0.18) • g_a (0).

Original language	English
Pages (from-to)	181-188
Number of pages	8
Journal	Hyperfine Interactions
Volume	103
Issue number	1-4
State	Published - Dec 1996

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Hasinoff, M. D., Ahmad, S., Armstrong, D. S., Azuelos, G., Bergbusch, P., Bertl, W., Blecher, M., Chen, C. Q., Depommier, P., Doyle, B. C., Von Egidy, T., Gorringe, T. P., Gumplinger, P., Healey, D. C., Jonkmans, G., Larabee, A. J., Macdonald, J. A., McDonald, S. C., Munro, M., ... Zhang, N. S. (1996). Radiative muon capture on hydrogen and the induced pseudoscalar coupling constant. Hyperfine Interactions, 103(1-4), 181-188.

@article{94eebe7c00064c24823528bde8d29858,

title = "Radiative muon capture on hydrogen and the induced pseudoscalar coupling constant",

abstract = "The first observation of the elementary process μ-p → νμγ is reported. The muons were stopped in a purified liquid hydrogen target and captured mainly on the ortho on the ortho pμp molecule. The photons were converted to e+e- pairs which were analyzed in a medium-resolution high-acceptance magnetic spectrometer. This reaction is particularly sensitive to the pseudoscalar coupling constant, gp, which was found to be: gp(q2 = -0.88mμ2) = (10.0 ± 0.9 ± 0.3) • ga(0). This value of gp, determined from the photon energy spectrum using a perturbation theory calculation based on tree-level Feynman diagrams, is ∼ 1.5 times the theoretical value, (6.70 ± 0.18) • ga (0).",

author = "Hasinoff, \{M. D.\} and S. Ahmad and Armstrong, \{D. S.\} and G. Azuelos and P. Bergbusch and W. Bertl and M. Blecher and Chen, \{C. Q.\} and P. Depommier and Doyle, \{B. C.\} and \{Von Egidy\}, T. and Gorringe, \{T. P.\} and P. Gumplinger and Healey, \{D. C.\} and G. Jonkmans and Larabee, \{A. J.\} and Macdonald, \{J. A.\} and McDonald, \{S. C.\} and M. Munro and Poutissou, \{J. M.\} and R. Poutissou and Robertson, \{B. C.\} and E. Saettler and Sample, \{D. G.\} and C. Sigler and Taylor, \{G. N.\} and Wright, \{D. H.\} and Zhang, \{N. S.\}",

year = "1996",

month = dec,

language = "English",

volume = "103",

pages = "181--188",

journal = "Hyperfine Interactions",

issn = "0304-3843",

publisher = "Springer Nature",

number = "1-4",

}

Hasinoff, MD, Ahmad, S, Armstrong, DS, Azuelos, G, Bergbusch, P, Bertl, W, Blecher, M, Chen, CQ, Depommier, P, Doyle, BC, Von Egidy, T, Gorringe, TP, Gumplinger, P, Healey, DC, Jonkmans, G, Larabee, AJ, Macdonald, JA, McDonald, SC, Munro, M, Poutissou, JM, Poutissou, R, Robertson, BC, Saettler, E, Sample, DG, Sigler, C, Taylor, GN, Wright, DH & Zhang, NS 1996, 'Radiative muon capture on hydrogen and the induced pseudoscalar coupling constant', Hyperfine Interactions, vol. 103, no. 1-4, pp. 181-188.

TY - JOUR

T1 - Radiative muon capture on hydrogen and the induced pseudoscalar coupling constant

AU - Hasinoff, M. D.

AU - Ahmad, S.

AU - Armstrong, D. S.

AU - Azuelos, G.

AU - Bergbusch, P.

AU - Bertl, W.

AU - Blecher, M.

AU - Chen, C. Q.

AU - Depommier, P.

AU - Doyle, B. C.

AU - Von Egidy, T.

AU - Gorringe, T. P.

AU - Gumplinger, P.

AU - Healey, D. C.

AU - Jonkmans, G.

AU - Larabee, A. J.

AU - Macdonald, J. A.

AU - McDonald, S. C.

AU - Munro, M.

AU - Poutissou, J. M.

AU - Poutissou, R.

AU - Robertson, B. C.

AU - Saettler, E.

AU - Sample, D. G.

AU - Sigler, C.

AU - Taylor, G. N.

AU - Wright, D. H.

AU - Zhang, N. S.

PY - 1996/12

Y1 - 1996/12

N2 - The first observation of the elementary process μ-p → νμγ is reported. The muons were stopped in a purified liquid hydrogen target and captured mainly on the ortho on the ortho pμp molecule. The photons were converted to e+e- pairs which were analyzed in a medium-resolution high-acceptance magnetic spectrometer. This reaction is particularly sensitive to the pseudoscalar coupling constant, gp, which was found to be: gp(q2 = -0.88mμ2) = (10.0 ± 0.9 ± 0.3) • ga(0). This value of gp, determined from the photon energy spectrum using a perturbation theory calculation based on tree-level Feynman diagrams, is ∼ 1.5 times the theoretical value, (6.70 ± 0.18) • ga (0).

AB - The first observation of the elementary process μ-p → νμγ is reported. The muons were stopped in a purified liquid hydrogen target and captured mainly on the ortho on the ortho pμp molecule. The photons were converted to e+e- pairs which were analyzed in a medium-resolution high-acceptance magnetic spectrometer. This reaction is particularly sensitive to the pseudoscalar coupling constant, gp, which was found to be: gp(q2 = -0.88mμ2) = (10.0 ± 0.9 ± 0.3) • ga(0). This value of gp, determined from the photon energy spectrum using a perturbation theory calculation based on tree-level Feynman diagrams, is ∼ 1.5 times the theoretical value, (6.70 ± 0.18) • ga (0).

UR - https://www.scopus.com/pages/publications/27144492363

M3 - Article

AN - SCOPUS:27144492363

SN - 0304-3843

VL - 103

SP - 181

EP - 188

JO - Hyperfine Interactions

JF - Hyperfine Interactions

IS - 1-4

ER -

Radiative muon capture on hydrogen and the induced pseudoscalar coupling constant

Abstract

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