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Bs-antiBs mixing and lifetimes.

Lenz, Alexander (2014) 'Bs-antiBs mixing and lifetimes.', BEAUTY 2014: 15th International Conference on B-Physics at Frontier Machines Edinburgh UK, 14 -18 July 2014.


We review the status of mixing of neutral B-mesons, including a discussion of the current precision of Standard Model (SM) predictions as well as the space that is left for effects of new physics. In that respect we present several observables, which are particularly sensitive to the remaining new physics (NP) parameter space. B-mixing can also be used to test the fundaments of quantum mechanics, here we suggest a new measurement of the ratio of like-sign dilepton events to opposite-sign dilepton events. Finally we summarise briefly the status of lifetimes of heavy hadrons. The corresponding theory predictions rely on the same tool - the Heavy Quark Expansion (HQE) - as some of the mixing quantities. New experimental data has recently proven the validity of the HQE to a high accuracy. However, the theoretical precision of lifetime predictions is strongly limited by a lack of non-perturbative evaluations of matrix elements of dimension-six operators.

Item Type:Conference item (Paper)
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Available under License - Creative Commons Attribution Non-commercial Share Alike.
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Date accepted:07 December 2015
Date deposited:10 January 2016
Date of first online publication:2014
Date first made open access:No date available

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