Mixing and lifetimes of $b$-hadrons

Details Mixing and lifetimes of $b$-hadrons Mixing and lifetimes of $b$-hadrons

2008-02-07

arxiv.org/abs/0802.0977v1

AIP Conf.Proc.1026:36-47,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, invited talk at the XI Mexican Workshop on Particles and Fields, Tuxtla, Mexico, 7th - 12 th Nov. 2007

Scientific paper

10.1063/1.2965074

We review the status of mixing and lifetimes of $b$-hadrons. We will show that $\Delta \Gamma / \Delta M$, $a_{sl}$ and $\phi$ are better suited to search for new physics effects than $\Delta M$ alone, because of our poor knowledge of the decay constants. The theoretical precision in the determination of $\Gamma_{12} / M_{12}$ - which contains all information on $\Delta \Gamma / \Delta M$, $a_{sl}$ and $\phi$ - can be tested directly by investigating the lifetimes of $b$-hadrons, because both quantities rely on the same theoretical footing. In particular we will also present a numerical estimate for the lifetime of the $\Xi_b$-baryon.

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