Lifetime Difference in B_s mixing: Standard Model and beyond

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We present a calculation of 1/m^2_b corrections to the lifetime differences of B_s mesons ΔΓ_s in the heavy-quark expansion. We find that they are small to significantly affect ΔΓ_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 ΔB = 1 New Physics contributions to ΔΓ_s and provide several examples.
21 pages, 6 figures

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High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/193006

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0707.0294
 http://arxiv.org/abs/0707.0294
 Phys.Lett.B653:230-240,2007
 doi:10.1016/j.physletb.2007.07.049

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arXiv