New-Physics Effects on Triple-Product Correlations in Lambda_b Decays
摘要
We adopt an effective-lagrangian approach to compute the new-physics contributions to T-violating triple-product correlations in charmless Lambda_b decays. We use factorization and work to leading order in the heavy-quark expansion. We find that the standard-model (SM) predictions for such correlations can be significantly modified. For example, triple products which are expected to vanish in the SM can be enormous (~50%) in the presence of new physics. By measuring triple products in a variety of Lambda_b decays, one can diagnose which new-physics operators are or are not present. Our general results can be applied to any specific model of new physics by simply calculating which operators appear in that model.
引用
@article{arxiv.hep-ph/0208054,
title = {New-Physics Effects on Triple-Product Correlations in Lambda_b Decays},
author = {Wafia Bensalem and Alakabha Datta and David London},
journal= {arXiv preprint arXiv:hep-ph/0208054},
year = {2009}
}
备注
20 pages, LaTeX, no figures. Added a paragraph (+ references) discussing nonfactorizable effects. Conclusions unchanged