寻找新的物理 \(\bar {\mathcal {B}}(B_{s,d}\to \mu \bar \mu )/\Delta M_{s,d}\)

IF 0.9 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

Acta Physica Polonica B Pub Date : 2021-04-19 DOI:10.5506/APhysPolB.52.1189

C. Bobeth, A. Buras

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引用次数: 1

摘要

我们再次强调，比值Rsμ≡B(Bs→μμ ā)/∆m是标准模型(SM)的一个测量值，具有B(Bs→μμ ā)的最新测量值，它不受|Vcb|测定中包含与不包含的B→c′ν ā衰变的持续困扰，它影响CKM元素|Vts|的值，这对B(Bs→μμ ā)和∆m的SM预测至关重要，但在比值Rsμ中被抵消。在我们的分析中，我们包括了高阶电弱和QED修正，并适应了最新的强子输入，得到了一个约为2σ的张力，与SM独立于|Vts|测量。我们还讨论了比值Rdμ，当这两个比值的数据都得到改善时，它可能会对寻找新物理学有用，特别是与Rsμ相关的比值。此外，Rdμ独立于|Vcb|或更准确地说|Vtd|。ar X iv:2 10 4。[au:] [au:] [au:] [au:] [au:

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Searching for New Physics with \(\bar {\mathcal {B}}(B_{s,d}\to \mu \bar \mu )/\Delta M_{s,d}\)

We reemphasize that the ratio Rsμ ≡ B(Bs → μμ̄)/∆Ms is a measure of the tension of the Standard Model (SM) with latest measurements of B(Bs → μμ̄) that does not suffer from the persistent puzzle on the |Vcb| determinations from inclusive versus exclusive b→ c`ν̄ decays and which affects the value of the CKM element |Vts| that is crucial for the SM predictions of both B(Bs → μμ̄) and ∆Ms, but cancels out in the ratio Rsμ. In our analysis we include higher order electroweak and QED corrections und adapt the latest hadronic input to find a tension of about 2σ for Rsμ measurements with the SM independently of |Vts|. We also discuss the ratio Rdμ which could turn out, in particular in correlation with Rsμ, to be useful for the search for New Physics, when the data on both ratios improves. Also Rdμ is independent of |Vcb| or more precisely |Vtd|. ar X iv :2 10 4. 09 52 1v 1 [ he pph ] 1 9 A pr 2 02 1

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来源期刊

Acta Physica Polonica B 物理-物理：综合

CiteScore

1.70

自引率

20.00%

发文量

审稿时长

3-8 weeks

期刊介绍： Acta Physica Polonica B covers the following areas of physics: -General and Mathematical Physics- Particle Physics and Field Theory- Nuclear Physics- Theory of Relativity and Astrophysics- Statistical Physics