Lifetime Difference in B_s mixing: Standard Model and beyond

Details Lifetime Difference in B_s mixing: Standard Model and beyond Lifetime Difference in B_s mixing: Standard Model and beyond

2007-07-02

arxiv.org/abs/0707.0294v1

Phys.Lett.B653:230-240,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 6 figures

Scientific paper

10.1016/j.physletb.2007.07.049

We present a calculation of 1/m^2_b corrections to the lifetime differences of B_s mesons \Delta \Gamma_s in the heavy-quark expansion. We find that they are small to significantly affect \Delta \Gamma_s and present the result for lifetime difference including non-perturbative 1/m_b and 1/m_b^2 corrections. We also analyze the generic \Delta B = 1 New Physics contributions to \Delta \Gamma_s and provide several examples.

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