Alexander Lenz
Theoretical status of Bs-mixing and lifetimes of heavy hadrons
Lenz, Alexander; Castaldi, R.; Chiarelli, G.; Forti, F; Scribano, A.
Authors
R. Castaldi
G. Chiarelli
F Forti
A. Scribano
Abstract
We review the theoretical status of the lifetime ratios τB+/τBd, τBs/τBd, τΛb/τBd and τBc and of the mixing quantities ΔMs, ΔΓs and ϕs. ΔMs and ΔΓs suffer from large uncertainties due to the badly known decay constants, while the ratio ΔΓs/ΔMs can be determined with almost no non-perturbative uncertainties, therefore it can be used perfectly to find possible new physics contributions in the mixing parameters. We suggest a very clear method of visualizing the bounds on new physics and demonstrate this by combining the latest experimental numbers on the mixing quantities quantities with theory – one already gets some hints for new physics contributions, but more precise experimental numbers are needed to draw some definite conclusions. We conclude with a ranking list of all the discussed quantities according to their current theoretical uncertainties and point out possible improvements.
Citation
Lenz, A., Castaldi, R., Chiarelli, G., Forti, F., & Scribano, A. (2008). Theoretical status of Bs-mixing and lifetimes of heavy hadrons. . https://doi.org/10.1016/j.nuclphysbps.2007.11.089
Conference Name | Hadron Collider Physics Symposium 2007. |
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Conference Location | La Biodola, Isola d’Elba, Italy |
Acceptance Date | Dec 7, 2007 |
Online Publication Date | Mar 6, 2008 |
Publication Date | Mar 6, 2008 |
Deposit Date | Dec 7, 2015 |
Publicly Available Date | Mar 30, 2016 |
Volume | 177-178 |
Pages | 81-86 |
Series ISSN | 0920-5632 |
DOI | https://doi.org/10.1016/j.nuclphysbps.2007.11.089 |
Additional Information | Conference dates: 20–26 May 2007 |
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