Muon Capture in Hydrogen

“…For hydrogen capture the neutrons are mono-energetic with E n = 5.2 MeV while for deuterium capture the neutrons are peaked at E n ∼ 1.5 MeV. Hydrogen data is available on liquid targets from Bleser et al (1962) and Rothberg et al (1963) and on gas targets from Alberigi-Quaranta et al (1969) and Bystritskii et al (1974). Deuterium data is available in pure D 2 from Cargnelli et al (1989) and H 2 /D 2 mixtures from Wang et al (1965) and Bertin et al (1973).…”

Section: Neutron Methodsmentioning

confidence: 99%

Induced pseudoscalar coupling of the proton weak interaction

2003

View full text Add to dashboard Cite

The induced pseudoscalar coupling gp is the least well known of the weak coupling constants of the proton's charged-current interaction. Its size is dictated by chiral symmetry arguments, and its measurement represents an important test of quantum chromodynamics at low energies. During the past decade a large body of new data relevant to the coupling gp has been accumulated. This data includes measurements of radiative and non radiative muon capture on targets ranging from hydrogen and few-nucleon systems to complex nuclei. Herein the authors review the theoretical underpinnings of gp, the experimental studies of gp, and the procedures and uncertainties in extracting the coupling from data. Current puzzles are highlighted and future opportunities are discussed.

show abstract

“…The results indicate a value of gp/ga ~ 11 -12 in 1 6 0, again larger than the Goldberger-Treiman value. Finally, in 28 Si a measurement has been made of the angular correlation between the neutrino and nuclear de-excitation gammarays from a given excited state. Very different values for gp/ga have been extracted using two different calculations of the relevant nuclear matrix elements.…”

Section: Ordinary Muon Capturementioning

confidence: 99%

Radiative muon capture on carbon, oxygen, and calcium

Armstrong¹,

Ahmad²,

Burnham³

et al. 1991

Phys. Rev. C

View full text Add to dashboard Cite

The photon energy spectra fro111 radiative xxluon captBle on C, 0, and Ca llave bee11 measured using a. time projection chamber as a pair spectrometer. The branching ratio for radiative muon capture is sensitive to g", the induced pseudoscalar coupling constant of the weak interaction, Expressed in terms of the axial-vector weak coupling constant g, values of g"/go = 5.7 6 0.8 and gJ, /g = 7.3 + 0.9 are obtained for Ca. and ' 0, respectively, from comparison with phenomenological calculations of the nuclear response. Froxxi comparison with microscopic calculations, values of g&/g~= 4.6 + 1.8, 13.6 +~s , and 16.2 +o'7 for Ca. , ' 0, and C, respectively, are obtained. The microscopic results are suggestive of a renormalization of the nucleonic form factors within the nucleus.

show abstract

Muon Capture in Hydrogen

Cited by 73 publications

References 24 publications

Axial structure of the nucleon

Axial structure of the nucleon

Induced pseudoscalar coupling of the proton weak interaction

Radiative muon capture on carbon, oxygen, and calcium

Contact Info

Product

Resources

About