Estimate of B(K -> pi nu nubar) from Standard Model fits to lambda_t

Details Estimate of B(K -> pi nu nubar) from Standard Model fits to lambda_t Estimate of B(K -> pi nu nubar) from Standard Model fits to lambda_t

2002-12-20

arxiv.org/abs/hep-ph/0212321v4

Phys.Atom.Nucl.67:1398-1407,2004; Yad.Fiz.67:1423-1432,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, including 6 figures. v3 includes an expanded discussion of correlations between SM inputs to the lambda_t fit, clarif

Scientific paper

10.1134/1.1777296

We estimate B(K -> pi nu nubar) in the context of the Standard Model by fitting for lambda_t = Vtd x V*ts of the `kaon unitarity triangle' relation. We fit data from epsilon_K, the CP-violating parameter describing K-mixing, and a_{psi K}, the CP-violating asymmetry in B -> J/psi K decays. Our estimate is independent of the CKM matrix element Vcb and of the ratio of Bs to Bd mixing frequencies. The measured value of B(K+ -> pi+ nu nubar) can be compared both to this estimate and to predictions made from the ratio of B mixing frequencies.

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