CP Violation in Hyperon Nonleptonic Decays within the Standard Model
High Energy Physics - Phenomenology
2009-11-07 v2 High Energy Physics - Experiment
Abstract
We calculate the CP-violating asymmetries A(Lambda_-^0) and A(Xi_-^-) in nonleptonic hyperon decay within the Standard Model using the framework of heavy-baryon chiral perturbation theory (chiPT). We identify those terms that correspond to previous calculations and discover several errors in the existing literature. We present a new result for the lowest-order (in chiPT) contribution of the penguin operator to these asymmetries, as well as an estimate for the uncertainty of our result that is based on the calculation of the leading nonanalytic corrections.
Keywords
Cite
@article{arxiv.hep-ph/0211165,
title = {CP Violation in Hyperon Nonleptonic Decays within the Standard Model},
author = {Jusak Tandean and G. Valencia},
journal= {arXiv preprint arXiv:hep-ph/0211165},
year = {2009}
}
Comments
21 pages, 2 figures; discussion clarified, results & conclusions unchanged, to appear in Phys. Rev. D