scholarly journals Local chiral interactions, the tritium Gamow-Teller matrix element, and the three-nucleon contact term

2018 ◽  
Vol 98 (4) ◽  
Author(s):  
A. Baroni ◽  
R. Schiavilla ◽  
L. E. Marcucci ◽  
L. Girlanda ◽  
A. Kievsky ◽  
...  
Keyword(s):  
Matrix Element ◽  
Contact Term ◽  
Chiral Interactions ◽  
Gamow Teller

Comments on the effect of Δ (1232 MeV)-hole excitation in quenching the gamow-teller matrix element

1983 ◽  
Vol 122 (2) ◽  
pp. 126-130 ◽  
Author(s):  
A. Arima ◽  
T. Cheon ◽  
K. Shimizu ◽  
H. Hyuga ◽  
T. Suzuki
Keyword(s):  
Matrix Element ◽  
Hole Excitation ◽  
Gamow Teller

GT± STRENGTH DISTRIBUTION IN 48Sc AND 116In MEASURED BY (p, n) AND (n, p) REACTIONS AT 300 MeV AND THEIR IMPLICATIONS FOR 2ν2β DECAY

2009 ◽  
Vol 18 (10) ◽  
pp. 2119-2123
Author(s):  
HIDE SAKAI ◽  
KENTARO YAKO ◽  
ICHOR COLLABORATION
Keyword(s):  
Matrix Element ◽  
Excitation Energy ◽  
Cross Sections ◽  
Nuclear Matrix ◽  
Differential Cross ◽  
Nuclear Matrix Element ◽  
Strength Distribution ◽  
Angular Distributions ◽  
Decomposition Technique ◽  
Gamow Teller

Angular distributions of the double differential cross sections for the 48 Ca , 116 Cd (p, n) and the 48 Ti , 116 Sn (n, p) reactions were measured at 300 MeV. A multipole decomposition technique was applied to the spectra to extract the Gamow-Teller (GT) transition strengths. In both (n, p) spectra beyond 8 MeV excitation energy extra B( GT +) strengths which are not predicted by either shell model or QRPA calculations. This extra B( GT +) strengths certainly contribute to the nuclear matrix element of the 2ν2β-decay.

Axial Currents in Nuclei: The Gamow-Teller Matrix Element

1979 ◽  
Vol 42 (1) ◽  
pp. 47-50 ◽  
Author(s):  
Eulogio Oset ◽  
Mannque Rho
Keyword(s):  
Matrix Element ◽  
Gamow Teller

scholarly journals Dispersion relation analysis of the radiative corrections to gA in the neutron β-decay

2021 ◽  
Vol 2021 (10) ◽  
Author(s):  
Mikhail Gorchtein ◽  
Chien-Yeah Seng
Keyword(s):  
Matrix Element ◽  
Dispersion Relation ◽  
Form Factors ◽  
Radiative Corrections ◽  
Coupling Constant ◽  
Β Decay ◽  
Relation Analysis ◽  
Elastic Form ◽  
Gamow Teller ◽  
Better Than

Abstract We present the first and complete dispersion relation analysis of the inner radiative corrections to the axial coupling constant gA in the neutron β-decay. Using experimental inputs from the elastic form factors and the spin-dependent structure function g1, we determine the contribution from the γW-box diagram to a precision better than 10−4. Our calculation indicates that the inner radiative corrections to the Fermi and the Gamow-Teller matrix element in the neutron β-decay are almost identical, i.e. the ratio λ = gA/gV is almost unrenormalized. With this result, we predict the bare axial coupling constant to be $$ {\overset{\circ }{g}}_A=-1.2754{(13)}_{\mathrm{exp}}{(2)}_{\mathrm{RC}} $$ g ∘ A = − 1.2754 13 exp 2 RC based on the PDG average λ = −1.2756(13).

Fermi to gamow-teller matrix element ratios in allowed beta transitions in 152Eu, 124Sb and 72Ga

1965 ◽  
Vol 72 (1) ◽  
pp. 145-157 ◽  
Author(s):  
S.K. Bhattacherjee ◽  
S.K. Mitra ◽  
H.C. Padhi
Keyword(s):  
Matrix Element ◽  
Element Ratios ◽  
Gamow Teller
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