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arXiv 0707.3439hep-ph
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R_{e/mu} ^{(pi,K)}的标准模型预测

The Standard Model prediction for R_{e/mu}^{(pi,K)}

Vincenzo Cirigliano, Ignasi Rosell

摘要:

我们研究了手征微扰理论中的比率R_{e/mu} ^{(P)} = Gamma(P -> e nu [gamma])/Gamma(P -> mu nu [gamma])(P=pi,K)到e^2 p^4阶.我们用对反项的匹配计算补充了双环有效理论的结果,发现R_{e/mu} ^{(pi)} =(1.2352 \pm 0.0001)*10^(-4)和R_{e/mu} ^{(K)} =(2.477 \pm 0.001)*10^(-5)。

英文摘要:

We study the ratios R_{e/mu}^{(P)} = Gamma(P -> e nu [gamma])/Gamma(P -> mu nu [gamma]) (P=pi,K) in Chiral Perturbation Theory to order e^2 p^4. We complement the two-loop effective theory results with a matching calculation of the counterterm, finding R_{e/mu}^{(pi)} = (1.2352 \pm 0.0001)*10^(-4) and R_{e/mu}^{(K)} = (2.477 \pm 0.001)*10^(-5).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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