Xsll at Belle
نویسنده
چکیده
The electroweak penguin mediated B → Xsll decay is a good probe to study beyond the Standard Model physics at low energy. The effect of new physics could be observed as corrections to the branching fraction, di-lepton invariant mass spectrum, and to the Wilson coefficients such as C9, C10, and a phase of C7 [1-10]. Experimentally, the exclusive B → Kll decay was observed by the Belle collaboration for the first time [11] and has also recently confirmed by the BABAR collaboration [12]. We present here a preliminary result on a search for the inclusive B → Xsll decay, which can be calculated more reliably than exclusive decay modes.
منابع مشابه
ar X iv : h ep - p h / 05 12 06 6 v 1 5 D ec 2 00 5 ZU - TH
The B̄ → Xsll decay rate is known at the next-to-next-to-leading order in QCD. It is proportional to αem(μ) 2 and has a ±4% scale uncertainty before including the O (αem ln(M W/mb)) electromagnetic corrections. We evaluate these corrections and confirm the earlier findings of Bobeth et al.. Furthermore, we complete the calculation of logarithmically enhanced electromagnetic effects by including ...
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