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Lee, W. P.; Sabbas, Albert; Chen, M. E.; Kravitz, P. S.; Chirovsky, L. M. F.; Groves, J.L.; Wu, Chenye

doi:10.1103/physrevc.32.1715

Cited by 7 publications

(12 citation statements)

References 18 publications

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“…The cos θ dependence of the first Legendre polynomial is clearly indicated, as well as the influence of backscattering illustrated by data taken with a thick source. They obtained AJiv/c) = + 0.639 (12) for the pure Gamow-Teller 5 + ->4 + ß-decay of 60 Co, in agreement with the theoretical value of + 0.633 for maximal parity violation in V-A theory [32]. This high precision result was obtained after a careful analysis.…”

Section: Beta-asymmetry Measurements With Nuclear Orientationsupporting

confidence: 86%

“…NO measurements of the F-GT mixing ratio for the isospin-forbidden allowed I t = Ij decays of 56 Co and 58 Co were also carried out at Columbia University [11][12]. These ß-decay data yield small Fermi admixtures, as expected.…”

Section: Beta-asymmetry Measurements With Nuclear Orientationmentioning

confidence: 86%

“…A second advantage of the low temperature nuclear orientation technique is that it allows precise and accurate anisotropy information to be deduced by using appropriate source preparation and detection techniques. As an illustration, it has been shown that for ß-asymmetries in most cases a higher signal to background ratio is obtained than with β-γ circular polarization correlation experiments [10][11], This has been indicated by the NO results of the Fermi to Gamow-Teller ratios in ß-decay [11][12].…”

Section: Introductionmentioning

confidence: 87%

“…In this way, the α-amplitudes reflect the change in deformation that takes place during decay. Assuming that the formation probability of an alpha-particle on the surface is proportional to the radial change in the α-transition, one can write [71] g L~( 2L+ 1) 1/2 j" P L (cos 0)Ψ α (θ) d cos θ (12) where ~ ~ with R(6) = R 0 [1 + Σα* P t (cos0)] and R 0 =l.2A 1 ' 3 .…”

Section: Beta-asymmetry Measurements With Nuclear Orientationmentioning

confidence: 99%

See 3 more Smart Citations

14 Particle Decay Study of Oriented Nuclei

1997

Experimental Techniques in Nuclear Physics

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Section: Beta-asymmetry Measurements With Nuclear Orientationsupporting

confidence: 86%

Section: Beta-asymmetry Measurements With Nuclear Orientationmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 87%

Section: Beta-asymmetry Measurements With Nuclear Orientationmentioning

confidence: 99%

See 2 more Smart Citations

14 Particle Decay Study of Oriented Nuclei

1997

Experimental Techniques in Nuclear Physics

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“…The background-field method [13][14][15][16][17] is ideally suited to the computation of effective interaction in curved spaces. It has been used to study the renormalization property of gauge theories in curved Riemannian spacetime by various authors [27,[29][30][31], establishing renormalizability at one-loop level and beyond. In the case of Riemann-Cartan spacetime, there does not seem to exist investigations in the literature of the renormalizability question of gauge theories.…”

Section: One-loop Renormalization By Background-field Methodsmentioning

confidence: 99%

Torsion in gauge theory

Nieh

2018

Phys. Rev. D

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The potential conflict between torsion and gauge symmetry in the Riemann-Cartan curved spacetime was noted by Kibble in his 1961 pioneering paper, and has since been discussed by many authors. Kibble suggested that, to preserve gauge symmetry, one should forgo the covariant derivative in favor of the ordinary derivative in the definition of the field strength Fµν for massless gauge theories, while for massive vector fields covariant derivatives should be adopted. This view was further emphasized by Hehl and collaborators in their influential 1976 review paper. We address the question of whether this deviation from normal procedure by forgoing covariant derivatives in curved spacetime with torsion could give rise to inconsistencies in the theory, such as the quantum renormalizability of a realistic interacting theory. We demonstrate in this note the one-loop renormalizability of a realistic gauge theory of gauge bosons interacting with Dirac spinors, such as the SU(3) chromodynamics, for the case of a curved Riemann-Cartan spacetime with totally antisymmetric torsion. This affirmative confirmation is one step towards providing justification for the assertion that the flat-space definition of the gauge field strength should be adopted as the proper definition.

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