T-violating triple-product correlations in charmless Λb decays

Using factorization, we compute, within the standard model, the T-violating triple-product correlations in the charmless decays Λ b → F 1 F 2, where F 1 is a light spin- 1 2 baryon and F 2 is a pseudoscalar ( P) or vector ( V) meson. We find a large triple-product asymmetry of 18% for the decay Λ b...

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Bibliographic Details
Published in:Physics letters. B 2002-07, Vol.538 (3), p.309-320
Main Authors: Bensalem, Wafia, Datta, Alakabha, London, David
Format: Article
Language:English
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Summary:Using factorization, we compute, within the standard model, the T-violating triple-product correlations in the charmless decays Λ b → F 1 F 2, where F 1 is a light spin- 1 2 baryon and F 2 is a pseudoscalar ( P) or vector ( V) meson. We find a large triple-product asymmetry of 18% for the decay Λ b → pK −. However, for other classes of Λ b → F 1 P decays, the asymmetry is found to be at most at the percent level. For Λ b → F 1 V decays, we find that all triple-product asymmetries are small (at most O(1%)) for a transversely-polarized V, and are even smaller for longitudinal polarization. Our estimates of the nonfactorizable contributions to these decays show them to be negligible, and we describe ways of testing this.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(02)02028-2