arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1212.6281hep-ph
收藏

$D^0 \rightarrow K^- π^+ $中CP破坏的观测作为新物理学的确凿证据

Observation of CP violation in $D^0 \rightarrow K^- π^+ $ as a smoking gun for New Physics

David Delepine, Gaber Faisel, Carlos A. Ramirez

摘要:

本文研究了Cabibbo偏爱的非轻子$D^0$衰变为$K^- π^+$衰变。首先,我们表明,在标准模型,相应的CP不对称性强烈抑制和实验范围外,即使考虑到大的强相位来自终态相互作用。我们还表明,虽然新的物理模型与额外的顺序产生可以提高CP不对称性的几个数量级,但由此产生的CP不对称性仍然远离实验范围。对CP不对称性最敏感的新物理模型来自没有明显的左-右模型,其中CP不对称性可以达到10%,而SM的一般两个希格斯模型扩展可以获得$10^{-2}$级的CP不对称性,而不会与这些模型的实验约束相矛盾。

英文摘要:

In this paper, we study the Cabibbo favored non-leptonic $D^0$ decays into $K^- π^+$ decays. First we show that, within the Standard Model, the corresponding CP asymmetry is strongly suppressed and out of the experimental range even taking into account the large strong phases coming from final state Interactions. We show also that although new physics models with extra sequential generation can enhance the CP asymmetry by few orders of magnitude however the resulting CP asymmetry is still far from experimental range. The most sensitive New Physics Models to this CP asymmetry comes from no-manifest Left-Right models where a CP asymmetry up to 10% can be reached and general two Higgs models extension of SM where a CP asymmetry of order $10^{-2}$ can be obtained without being in contradiction with the experimental constraints on these models.

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。

↑