New-Physics Effects on Triple-Product Correlations in Lambda_b Decays

Details New-Physics Effects on Triple-Product Correlations in Lambda_b Decays New-Physics Effects on Triple-Product Correlations in Lambda_b Decays

2002-08-06

arxiv.org/abs/hep-ph/0208054v2

Phys.Rev. D66 (2002) 094004

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, LaTeX, no figures. Added a paragraph (+ references) discussing nonfactorizable effects. Conclusions unchanged

Scientific paper

10.1103/PhysRevD.66.094004

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.

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