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Weak radiative hyperon decays and vector meson dominance

✍ Scribed by P. Żenczykowski

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
308 KB
Volume
75
Category
Article
ISSN
0920-5632

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✦ Synopsis

We study the question whether the phenomenologicaily successful VMD approach to weak radiative hyperon decays can be made consistent with Hera's theorem and still yield the pattern of asymmetries exhibited by experimentM data. It appears that an essential ingredient which governs the pattern of asymmetries is the offshell behaviour of the input electromagnetic 1/2--1/2 + -7 couplings. Although this behaviour can be chosen in such a way that the experimentally observed pattern is obtained, and yet Hera's theorem satisfied, at the same time the approach yields a definite prediction for the size of weak meson-nucleon coupling constants. Comparison with experiment reveals then another conflict.

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