$CP$违反了LHCb的魅力

IF 5.9 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Rivista Del Nuovo Cimento Pub Date : 2020-01-01 DOI:10.1393/NCC/I2019-19250-3

T. Pajero

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引用次数: 0

摘要

虽然CP破坏的CKM范式已经在K介子和B介子中得到了广泛的测试，但在上型夸克的衰变中仍然没有观察到CP破坏。因此，对粲衰中$CP$违反的研究是对标准模型的一种补充测试，因为它允许约束$CP$违反的算子，这些算子可能不影响下型夸克的可观测值。本文回顾了LHCb合作对粲衰变中$CP$违反的两个最新测量结果。他们的精度低于$10^{-3}$的水平，最终进入了标准模型预测范围的上限。即将到来的LHCb升级1(2021-2029)将允许将符码中$CP$违规的搜索精度提高到$10^{-4}$水平以下。

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$CP$ violation in charm at LHCb

$CP$While the CKM paradigm of CP violation has been tested extensively in $K$ and $B$ mesons, $CP$ violation remains unobserved in the decay of up-type quarks. The study of $CP$ violation in charm decays is thus a complementary test of the Standard Model, since it allows constraining $CP$-violating operators that might leave the observables of down-type quarks unaffected. Two recent measurements of $CP$ violation in charm decays by the LHCb Collaboration are reviewed. Their precision, below the $10^{-3}$ level, is finally entering the upper limit of the range of Standard Model predictions. The forthcoming Upgrade I of LHCb (2021–2029) will allow pushing the precision of the searches for $CP$ violation in charm below the $10^{-4}$ level.

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来源期刊

Rivista Del Nuovo Cimento 物理-物理：综合

CiteScore

9.50

自引率

2.20%

发文量

审稿时长

>12 weeks

期刊介绍： La Rivista del Nuovo Cimento is an international peer-reviewed journal. It publishes monographs in all fields of physics. These monographies aim at presenting the state of the art of topical subjects of relevant interest for the community. Usually, authors are invited and topics suggested by the Deputy Editors-in-Chief, but also spontaneous submissions are examined.