arXiv subjects
Publications and source records attributed to T. P. Gorringe.
The hyperfine (hf) transition rates for muonic atoms have been re-measured for select light nuclei, using neutron detectors to evaluate the time dependence of muon capture. For $^{19}$F $Λ$$_{h}$ = 5.6 (2) $μ$s$^{-1}$ for the hf transition rate, a value which is considerably more accurate than previous measurements. Results are also reported for Na, Al, P, Cl, and K; that result for P is the first positive identification.
The first measurement of the elementary process $μ^- p \rightarrow ν_μ n γ$ is reported. A photon pair spectrometer was used to measure the partial branching ratio ($2.10 \pm 0.22) \times 10^{-8}$ for photons of k > 60 MeV. The value of the weak pseudoscalar coupling constant determined from the partial branching ratio is $g_p(q^{2}=-0.88m_μ^2) = (9.8 \pm 0.7 \pm 0.3) \cdot g_a(0)$, where the first error is the quadrature sum of statistical and systematic uncertainties and the second error is due to the uncertainty in $λ_{op}$, the decay rate of the ortho to para $p μp$ molecule. This value of g_p is $\sim$1.5 times the prediction of PCAC and pion-pole dominance.