{ital K}{sub {ital S}}{r_arrow}{gamma}{gamma}, {ital K}{sub {ital L}}{r_arrow}{pi}{sup 0}{gamma}{gamma} and unitarity
- Department of Physics and Astronomy, University of Massachusetts, Amherst, Massachusetts 01003 (United States)
Agreement between the experimental value {Gamma}({ital K}{sub {ital S}}{r_arrow}{gamma}{gamma}) and the number predicted via a one-loop chiral perturbation theory calculation has been cited as a success for the latter. On the other hand, the one-loop prediction for the closely related process {ital K}{sub {ital L}}{r_arrow}{pi}{sup 0}{gamma}{gamma} has been found to be a factor 3 below the experimental value. Using the inputs of unitarity and dispersion relations, we demonstrate the importance of higher order loop effects to both of these processes.
- OSTI ID:
- 142714
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 5 Vol. 49; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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