Phys. Rev. Lett. 77, 4512–4515 (1996)Radiative Muon Capture on Hydrogen and the Induced Pseudoscalar CouplingReceived 19 August 1996; published in the issue dated 25 November 1996 The first measurement of the elementary process μ-p→νμnγ is reported. A photon pair spectrometer was used to measure the partial branching ratio (2.10±0.22)×10-8 for photons of k>60MeV. The value of the weak pseudoscalar coupling constant determined from the partial branching ratio is gp(q2 = -0.88mμ2) = (9.8±0.7±0.3)ga(0), where the first error is the quadrature sum of statistical and systematic uncertainties and the second error is due to the uncertainty in λop, the decay rate of the ortho to para pμp molecule. This value of gp is ∼1.5 times the prediction of partial conservation of axial current and pion-pole dominance. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.77.4512
DOI:
10.1103/PhysRevLett.77.4512
PACS:
23.40.Bw, 11.40.Ha, 13.60.-r, 14.20.Dh
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.