Weak radiative hyperon decays

Challenges in Hyperon Decays

“…A detailed overview on both experimental and theoretical aspects of weak radiative decays of hyperons is given in Refs. [18,4,5].…”

“…As a results, the theory has degenerated into models that are mostly invoked to account for particular special subsets of phenomenology. For example, it was well known that the lower order chiral perturbation theory cannot account for the data on hyperon radiative decays [4,5] even after the heavy baryon chiral perturbation theory formalism is employed [6,7,8]. In an attempt to resolve this puzzle, some additional resonances are added in the analysis recently [9].…”

A priorimixed hadrons, weak radiative and non-leptonic decays of hyperons

“…This path has been extensively discussed, very recent reviews are found in Ref. [4]. All the models considered so far contain three or more free parameters, most of them are fixed with non-leptonic hyperon decays data.…”

Hyperon weak radiative decays in chiral perturbation theory

“…A detailed overview on both experimental and theoretical aspects of weak radiative decays of hyperons is given in Refs. [4,21,22]. Chiral perturbation theory (ChPT) [23,24] has been shown to be a useful way of describing low energies hadronic processes, especially those that involve only mesons.…”

“…(29)obtained from nonleptonic hyperon decays. The first column shows the observed rates from Ref [22]…”