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arXiv 1208.2885hep-ex
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CERN的K介子实验:最近的结果和展望

Kaon experiments at CERN: recent results and prospects

Evgueni Goudzovski

摘要:

本文介绍了CERN的NA 48/2和NA 62 K介子飞行衰变实验的最新结果。使用NA 62实验(RK阶段)收集的完整专用数据集,对K+-至e+- nu和K+-至mu+- nu衰减速率的螺旋度抑制比RK进行了精确测量;结果与标准模型预期一致。在NA 48/2和NA 62实验中对K+-到π +-γ衰变的新测量提供了手征微扰理论的进一步检验。一个计划测量的分支比的超罕见的K+到π + nu反-nu衰变在10%的精度,预计代表一个强大的测试标准模型。

英文摘要:

Recent results from the NA48/2 and NA62 kaon decay-in-flight experiments at CERN are presented. A precision measurement of the helicity-suppressed ratio RK of the K+- to e+- nu and K+- to mu+- nu decay rates has been performed using the full dedicated data set collected by the NA62 experiment (RK phase); the result is in agreement with the Standard Model expectation. New measurements of the K+- to pi+- gamma gamma decay at the NA48/2 and NA62 experiments provide further tests of the Chiral Perturbation Theory. A planned measurement of the branching ratio of the ultra-rare K+ to pi+ nu anti-nu decay at 10% precision is expected to represent a powerful test of the Standard Model.

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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