Determination of the weak vector coupling constant from superallowed beta decay

The theoretical and experimental study of the two-neutrino double-beta decay (2νββ-decay) is of crucial importance for reliable calculation of matrix elements governing the neutrinoless double-beta decay (0νββ-decay). That will allow to determine masses of neutrinos once the 0νββ-decay, which occurs if the neutrino is a massive Majorana particle and the total lepton number is not onserved, will be observed. Experiments studying the 2νββ-decay are currently approaching a qualitatively new level, where high-precision measurements are performed not only for half-lives but for all other observables of the process. In this context an improved formula for the 2νββ-decay is presented. Further, a novel approach for determining the effective axial-vector coupling constant is proposed.

Download Full-text

Magnitude of the vector coupling constant deduced from recent beta decay measurements

Physics Letters B ◽

10.1016/0370-2693(69)90427-4 ◽

1969 ◽

Vol 30 (4) ◽

pp. 240-241 ◽

Cited By ~ 6

Author(s):

J.M. Freeman ◽

D.C. Robinson ◽

G.L. Wick

Keyword(s):

Beta Decay ◽

Coupling Constant ◽

Vector Coupling ◽

Vector Coupling Constant

Download Full-text

Accurate Fermi Beta Decay Measurements and the Magnitude of the Weak Interaction Vector Coupling Constant

Atomic Masses and Fundamental Constants 4 ◽

10.1007/978-1-4684-7876-1_10 ◽

1972 ◽

pp. 105-111

Author(s):

J. M. Freeman ◽

G. J. Clark ◽

J. S. Ryder ◽

W. E. Burcham ◽

G. T. A. Squier ◽

...

Keyword(s):

Beta Decay ◽

Weak Interaction ◽

Coupling Constant ◽

Vector Coupling ◽

Vector Coupling Constant

Download Full-text

Determination of the Axial-Vector Coupling Constant from the Extended Linear Sigma Model

International Journal of Applied Physics and Mathematics ◽

10.7763/ijapm.2014.v4.280 ◽

2014 ◽

Vol 4 (3) ◽

pp. 184-187

Author(s):

Tarek Sayed Taha Ali ◽

Keyword(s):

Sigma Model ◽

Axial Vector ◽

Linear Sigma Model ◽

Coupling Constant ◽

Vector Coupling ◽

Vector Coupling Constant ◽

Axial Vector Coupling

Download Full-text

Beta Decay of 35Ar

Canadian Journal of Physics ◽

10.1139/p71-083 ◽

1971 ◽

Vol 49 (6) ◽

pp. 663-669 ◽

Cited By ~ 8

Author(s):

J. S. Geiger ◽

B. W. Hooton

Keyword(s):

Beta Decay ◽

Ground State ◽

Half Life ◽

Coupling Constant ◽

Vector Coupling ◽

Vector Coupling Constant ◽

Γ Ray ◽

Gamma Radiations

The gamma radiations from the decay of 35Ar have been studied using Ge(Li) γ-ray detectors. Evidence is found for previously unreported β feeds to the 35Cl levels at 2695 and 3003 keV. The percentage β feeds to 35Cl levels are the following: 0 keV, 98.3 ± 0.2; 1220 keV, 1.22 ± 0.20; 1763 keV, 0.22 ± 0.05; 2695 keV, 0.16 ± 0.04; and 3003 keV, 0.11 ± 0.03. The 35Ar half-life is found to be 1.787 ± 0.012 s. The present results support the findings of Wick et al. that the vector coupling constant determined from the 35Ar ground state beta decay is significantly larger than the values inferred from other super-allowed decays.

Download Full-text