\( {B}_s\to {K}^0{\overline{K}}^0 \) beyond the Standard Model

IF 5.4 1区 物理与天体物理 Q1 Physics and Astronomy
Yuval Grossman, Matthias Neubert, Yosef Nir, Yogev Shpilman, Yehonatan Viernik
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引用次数: 0

Abstract

Within the Standard Model, the branching fraction of the rare decay \( {B}_s\to {K}^0{\overline{K}}^0 \) is related to other decay rates and CP asymmetries through the approximate SU(3) flavor symmetry of the strong interactions and the heavy-quark limit. Three such relations were shown to be violated at a level of about 3σ each. By means of a systematic search for new-physics explanations of these puzzles, we find that possible solutions are highly fine-tuned and either excluded by other data or rather implausible. The tight correlation between \( {B}_s\to K\overline{K} \) and BπK decays, which is maintained even in the presence of flavor-specific new-physics operators, plays a central role in our analysis.

\( {B}_s\to {K}^0{\overline{K}}^0 \) 超越标准模型
在标准模型中,稀有衰变\( {B}_s\to {K}^0{\overline{K}}^0 \)的分支分数通过强相互作用和重夸克极限的近似SU(3)风味对称与其他衰变速率和CP不对称相关。三个这样的关系分别在约3σ的水平上被打破。通过对这些谜题的新物理学解释的系统搜索,我们发现可能的解决方案是高度微调的,要么被其他数据排除在外,要么相当难以置信。\( {B}_s\to K\overline{K} \)和B→πK衰变之间的紧密相关性在我们的分析中起着核心作用,这种相关性即使在特定风味的新物理算子存在的情况下也能保持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of High Energy Physics
Journal of High Energy Physics 物理-物理:粒子与场物理
CiteScore
10.30
自引率
46.30%
发文量
2107
审稿时长
1.5 months
期刊介绍: The aim of the Journal of High Energy Physics (JHEP) is to ensure fast and efficient online publication tools to the scientific community, while keeping that community in charge of every aspect of the peer-review and publication process in order to ensure the highest quality standards in the journal. Consequently, the Advisory and Editorial Boards, composed of distinguished, active scientists in the field, jointly establish with the Scientific Director the journal''s scientific policy and ensure the scientific quality of accepted articles. JHEP presently encompasses the following areas of theoretical and experimental physics: Collider Physics Underground and Large Array Physics Quantum Field Theory Gauge Field Theories Symmetries String and Brane Theory General Relativity and Gravitation Supersymmetry Mathematical Methods of Physics Mostly Solvable Models Astroparticles Statistical Field Theories Mostly Weak Interactions Mostly Strong Interactions Quantum Field Theory (phenomenology) Strings and Branes Phenomenological Aspects of Supersymmetry Mostly Strong Interactions (phenomenology).
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