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Paper 9 - Test of the Nature of the Vector Interaction in Beta-decay

Gell-Mann, Murray (1969) Paper 9 - Test of the Nature of the Vector Interaction in Beta-decay. In: The Theory of Beta-Decay. Elsevier , New York, NY, pp. 200-210. ISBN 978-0-08-006509-0.

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An experiment is proposed to test the theory recently advanced by Feynman and Gell-Mann on the vector interaction in β decay. According to the theory, the Fermi coupling constant is not appreciably altered by renormalization, in agreement with experiment. A further property of the theory is exploited here, that analogous γ and β transitions in light nuclei have proportional matrix elements, as far as the V interaction is concerned. In particular, the V interaction gives rise to “weak magnetism” analogous to the magnetic effects that induce the emission of M1 photons. This “weak magnetism” obeys Gamow-Teller selection rules and interferes with the A coupling, distorting the spectra of high-energy β transitions with δJ = 1 (no). It is suggested that the β spectra of B^(12) and N^(12) be measured accurately and compared. Departure from linearity of the Kurie plot should be noticed in each case; the ratio of the spectra can be calculated with confidence on the basis of the theory, which predicts a 20% effect. The measured γ-ray width of the 15.11-Mev state in C^(12) is used in the calculation.

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Additional Information:© 1969 C. Strachan. Published by Elsevier. Received March 3, 1958. Work supported by the Alfred P. Sloan Foundation, Inc., and by the U.S. Atomic Energy Commission. It is a pleasure to acknowledge the value of conversations with F. Boehm, R. P. Feynman, W. A. Fowler, Thos. Lauritsen, B. Stech, and especially A. Wattenberg, who asked a question that sparked this investigation.
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Alfred P. Sloan FoundationUNSPECIFIED
Atomic Energy CommissionUNSPECIFIED
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Official Citation:MURRAY GELL-MANN, PAPER 9 - Test of the Nature of the Vector Interaction in Beta-decay†*, In The Theory of Beta-Decay, edited by C. STRACHAN, Pergamon, 1969, Pages 200-210, ISBN 9780080065090, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:60378
Deposited By: Ruth Sustaita
Deposited On:21 Sep 2015 20:42
Last Modified:10 Nov 2021 22:33

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