CP violation and hints for new physics at the B factories

CP (and CPT) violation studies at the Super Flavour Factories

In this talk we present the perspectives about measurements of CP and CPT violating quantities at future Super Flavour Factories. In particular we will focus on the expected sensitivities reachable after 5 years of data taking with the SuperB detector: this dataset will allow to perform measurements on B meson, D meson and tau lepton systems with greatly enhanced precision over the current results.

非对称$B$工厂中相干$P^{0}\bar{P}^{0}$衰变和CP破坏的时间依赖性

Time Dependence of Coherent $P^{0}\bar{P}^{0}$ Decays and CP Violation at Asymmetric $B$ Factories

一个通用的形式主义，提出了任何相干$P^{0}\bar{P}^{0}$系统（$P^{0} = K^{0}, D^{0}, B^{0}_{d}$，或$B^{0}_{s}$）的时间相关或时间积分衰变。为了满足非对称$B$工厂的各种可能的测量，我们重新分析了相干$B^{0}_{d}\bar{B}^ {0}_{d}$跃迁中的CP破坏的一些典型信号。适当的时间切割的优点说明测量混合参数和CP破坏。我们表明，直接和间接CP不对称性是可区分的中性B衰变到CP本征态。探讨了探测$Υ(4S)$共振态CP禁戒过程的可能性.

Latest Charm Mixing and $CP$ results from $B$-factories

Latest results on mixing and $CP$ violation in the charm decays at the $B$-factories are reported.

Search for Lepton Flavor Violating tau Decays at B-factories

Lepton flavor violations in charged lepton give good signatures for the new physics. We review recent searches for lepton flavor violation in tau decays at B-factories. In these searches, optimization for background reduction is important to obtain high sensitivity. No evidence for these decays is observed and 90% confidence level upper limits have been set on the branching fractions at the O(10^{-8}) level.

Angle averages from B-factories

The most recent measurements of three CP violation angles of Kobayashi-Maskawa unitarity triangle is reviewed.

B工厂的$\sin 2ϕ_2 (α)$结果

Results on $\sin 2ϕ_2 (α)$ from the B Factories

描述了$B^0\to π^+π^-$中CP破坏的状态以及来自$B$工厂的$\sin 2ϕ_2 (α)$的确定。

B工厂的物理学

Physics at the B Factories

我们回顾了两家$e^+ e^-$ B工厂的最新进展。讨论了CP破坏的首次测量和测量幺正三角形所有角的前景。

B工厂的|Vub|测量

|Vub| Measurements at B-Factories

确定Cabibbo-Kobayashi-Maskawa（CKM）夸克混合矩阵的Vub元在检验CP破坏的标准模型（SM）解释中起着核心作用。B工厂的测量结果依赖于不同的理论假设。最近的包容性和排他性的结果，从CLEO，BaBar和BELLE的审查。

超级B工厂

Super B Factories

在两个B工厂建立CP破坏的Kobayashi-Maskawa机制之后，研究了将积分亮度增加两个数量级的可能性，因为它似乎是通过CP破坏和其他稀有B介子衰变、D介子衰变和τ轻子衰变中的可观测量来发现标准模型之外的物理所需的量。本报告审查了计划在两个地点建造的超级B工厂的物理敏感性和现状。

Searches for Lepton Flavour Violation and Lepton Number Violation in Hadron Decays

In the Standard Model of particle physics, lepton flavour and lepton number are conserved quantities although no fundamental symmetry demands their conservation. I present recent results of searches for lepton flavour and lepton number violating hadron decays measured at the B factories and LHCb. In addition, the LHCb collaboration has recently performed a search for the lepton flavour violating decay τ^- \to μ^-μ^-μ^+. The obtained upper exclusion limit, that has been presented in this talk for the first time, is of the same order of magnitude as those observed at the B factories. This is the…

在B工厂的五年

Highlights from Five Years at the B Factories

简要回顾了B工厂的亮点和冲突。2001年在$B^0 \to J/ψK_S$和相关模式中建立了$CP$破坏，它现在已经成为$B^0$ - $\bar B^0$混合中CP破坏的精确测量。然而，$B^0 \to π^+π^-$和无魅力$b\to s$模式的情况还没有完全解决，这两种模式也探测{ \it衰减}幅度中的CP破坏。它们可能暗示了强（CP守恒）和新物理（CP破坏）阶段的存在。我们批判性地评估了发展，并讨论了一些相关的差异和亮点，如观察到的直接CP破坏，并对未来几年的预测。

Novel T-Violation observable open to any pair of decay channels at meson factories

Quantum Entanglement between the two neutral mesons produced in meson factories has allowed the first indisputable direct observation of Time Reversal Violation in the time evolution of the neutral meson between the two decays. The exceptional meson transitions are directly connected to semileptonic and CP-eigenstate decay channels. The possibility of extending the observable asymmetries to more decay channels confronts the problem of the "orthogonality condition", which can be stated with this tongue-twister: Given a decay channel $f$, Which is the decay channel $f'$ such that the meson state…

B Factories

The B factories were constructed with a very specific purpose in mind: to test the Cabibbo-Kobayashi-Maskawa description of quark mixing and CP violation in the Standard Model of particle physics. The goals of testing this part of the Standard Model were achieved, and have been surpassed beyond all expectation. As a result the B factories have revolutionised our understanding of many areas of the Standard Model of particle physics, and also provide a number of stringent limits on possible scenarios of physics beyond the Standard Model. In some cases these limits on new physics effects equal or…

在B工厂中无需信号顶点重建即可解锁时间依赖性CP破坏

Unlocking time-dependent $CP$ violation without signal vertexing at $B$ factories

本文提出一种无需重建信号顶点、利用标记B介子衰变时间测量B0衰变中时间依赖性CP破坏的新方法，在Belle II条件下对B0→π0π0的研究表明其灵敏度相当于标准方法20倍样本量，并能显著提升ϕ2测量精度。

B工厂的结果

Results from the B Factories

这些会议记录是基于2008年8月在俄罗斯杜布纳的Bogoliubov理论物理实验室的Helmholtz国际暑期学校重夸克物理学的讲座。本文综述了B介子衰变中CP破坏的研究现状。这些结果可以与幺正三角形的边的测量一起用于测试CKM机制。此外，我还讨论了实验研究的B衰变到最终状态的“自旋一”粒子。

美丽和魅力源自$B$ -工厂

Beauty and charm results from $B$-factories

我们目前的会议记录给出的讲座在2008年亥姆霍兹国际暑期学校重夸克物理在杜布纳的Bogoliubov理论物理实验室。在两个讲座中，我们介绍了现有的$B$工厂实验Belle和BaBar的最新结果。讨论的内容包括$B$介子振荡的唯象动机、实验方法和结果、部分稀有$B$介子衰变（轻子、$b\to sγ$和$b\to s\ell^+\ell^-$）、$D^0$介子系统的混合和CP破坏以及$D_s$介子的轻子衰变。

B工厂的τ物理学

tau physics at B-factories

今天，B工厂BaBar和Belle已经积累了最大的tau-tau事件样本，并正在竞争被称为tau-factories。BaBar和Belle要测试和测量的问题包括τ衰变中CP和CPT不变性的检查，奇异和非奇异谱函数的测量，奇异夸克和|V_us|质量的提取，轻子味破坏过程的搜索。本文综述了这两个实验的最新结果以及未来几年内将要进行的测量。

B工厂CKM角β/φ_1的测量

Measurements of the CKM Angle beta/phi_1 at B Factories

我们提出了一个审查的测量CKM角β（φ_1）的BaBar和Belle实验在非对称能量的e+ e-B工厂PEP-II和KEKB。通过对Uppersons（4S）->BBbar系统中中性B介子衰变的含时CP分析，测量了β角（φ_1）。在Uppersons（4S）->BBbar系统中，一个B介子被完全重构到一个B 0和B 0 bar都能接近的终态，通常是CP本征态。该角度已通过B 0->（ccbar）K 0通道以高精度测量。我们还讨论了树支配衰变B 0-> D（*）0 h 0（h 0 = pi 0，eta^K 0，omega），企鹅污染树衰变B 0->D（*）+-D-+$和J/psi pi 0，企鹅支配模B 0-> eta ^K 0，K+ K-K 0和KsKsKs.在小于（ccbar）K 0模式的无魅力模式中，sin 2beta（sin2phi_1）的暗示仍然存在，这可能是可能的新物理进入企鹅图中的循环的指示。

强子对撞机上的CP破坏和双μ子电荷不对称性的测量

On CP violation and the measurement of the dimuon charge asymmetry at hadron colliders

B工厂测量B^0 Bbar^0混合和衰变的CP破坏参数。强子对撞机测量了B强子混合物的双μ子电荷不对称性。在这篇笔记中，我们讨论了如何从这些测量中提取B^0_s Bbar^0_s混合和衰变的CP破坏参数的一个微妙的问题。

Tau Physics来自B工厂

Tau Physics from B Factories

本文介绍了SLAC和KEKB工厂的BaBar和Belle实验的$τ$-轻子对物理结果，这些实验产生了大量的$τ$ -轻子对。测量τ质量和寿命可以测试轻子普适性和CPT不变性，而在τ衰变中寻找轻子味破坏是寻找标准模型之外的物理学的有力方法。在半强子非奇异τ衰变中，矢量强子末态在帮助确定μ子反常磁矩的强子修正方面特别重要，而对奇异末态的研究是测量CKM矩阵元$V_{\rm us}$和奇异夸克质量的最佳方法。

Study of CP violation in hyperon decays at Super Charm-Tau Factories with a polarized electron beam

Non-leptonic two-body weak decays of baryons are an important tool to probe the combined charge-conjugation--parity symmetry (CP) violation. We explain why the decays of strange baryons provide complementary information to the decays of kaons. A model-independent parameterization of the non-leptonic decays of the $Λ$- and $Ξ$-baryons is reviewed, and the amplitudes are updated according to the latest experimental input. We demonstrate the potential of performing precision tests in strange baryon decays at the next generation electron-positron $J/ψ$ factories with luminosity of $10^{35}$ cm$^{-…

B介子系统中的CP破坏：最近的实验结果

CP violation in the B meson system: recent experimental results

评述了B介子衰变研究中CP破坏的最新实验结果。重点介绍了最近在非对称B介子工厂进行的BABAR和BELLE实验对CP参数sin2 β的测量，它们首次在B介子系统中建立了CP破坏。

B物理与CP破坏讲座

Lectures on B Physics and CP Violation

这些讲座介绍了B介子衰变的现象学及其对我们理解夸克扇区中的CP破坏的影响，重点是在e+e- B工厂进行的测量。介绍了与之相关的算子乘积展开和重夸克对称性等理论思想，并给出了它们在确定CKM矩阵元中的应用。本文综述了B味振荡现象，给出了B系统中CP破坏的机理和研究现状。对稀有B衰变的地位也进行了讨论。

Can atmospheric neutrino experiments provide the first hint of leptonic CP violation?

The measurement of a non-zero value of the 1-3 mixing angle has paved the way for the determination of leptonic CP violation. However the current generation long-baseline experiments T2K and NOvA have limited sensitivity to delta_{CP}. In this paper we show for the first time, the significance of that atmospheric neutrino experiments in providing the first hint of CP violation in conjunction with T2K and NOvA. In particular, we find that adding atmospheric neutrino data from the ICAL detector at the India-based Neutrino Observatory (INO) to T2K and NOvA results in a two-fold increase in the ra…

Interpreting Hints for Lepton Flavor Universality Violation

We interpret the recent hints for lepton flavor universality violation in rare $B$ meson decays. Based on a model-independent effective Hamiltonian approach, we determine regions of new physics parameter space that give a good description of the experimental data on $R_K$ and $R_{K^*}$, which is in tension with Standard Model predictions. We suggest further measurements that can help narrowing down viable new physics explanations. We stress that the measured values of $R_K$ and $R_{K^*}$ are fully compatible with new physics explanations of other anomalies in rare $B$ meson decays based on the…

B衰变中的直接CP破坏

Direct CP violation in B decays

我们回顾了最近的直接CP破坏的实验结果。热门话题是测量B 0，B+的无粲二体衰变。与此相关，现在可以获得Bs 0和Lambda_b0衰变的第一个类似测量。此外，通过对B工厂K+ π-π +末态的Dalitz图分析，首次获得了B+衰变中直接CP破坏的证据。最后一组讨论的结果探讨了b -> c \bar{c} d跃迁，试图解决Belle和BABAR实验在B 0-> D+D-衰变中CP破坏的差异。

First hint for CP violation in neutrino oscillations from upcoming superbeam and reactor experiments

We compare the physics potential of the upcoming neutrino oscillation experiments Daya Bay, Double Chooz, NOvA, RENO, and T2K based on their anticipated nominal luminosities and schedules. After discussing the sensitivity to theta_{13} and the leading atmospheric parameters, we demonstrate that leptonic CP violation will hardly be measurable without upgrades of the T2K and NOvA proton drivers, even if theta_{13} is large. In the presence of the proton drivers, the fast track to hints for CP violation requires communication between the T2K and NOvA collaborations in terms of a mutual synchroniz…

D^0- \bar{D}^0混合和CP破坏的可能信号

Possible Signals of D^0-\bar{D}^0 Mixing and CP Violation

考虑到未来高亮度固定靶装置、B介子工厂和τ粲工厂实验的发现潜力，重点介绍了中性D介子衰变到半轻子末态、强子CP本征态、强子非CP本征态和CP禁戒态时可能出现的D^0- \bar{D}^0混合和CP破坏的一些典型信号.讨论了时间相关测量和时间积分测量，特别关注D^0/ \bar{D}^0 \to K_{S,L} +π^0和D^0/ \bar{D}^0 \to K^{ \pm }π^{ \mp }跃迁。

Hints for leptonic CP violation or New Physics?

One of the major open questions in the neutrino sector is the issue of leptonic CP violation. Current global oscillation data shows a mild preference for a large, potentially maximal value for the Dirac CP phase in the neutrino mixing matrix. In this letter, we point out that New Physics in the form of neutral-current like non-standard interactions with real couplings would likely yield a similar conclusion even if CP in the neutrino sector were conserved. Therefore, the claim for a discovery of leptonic CP violation will require a robust ability to test New Physics scenarios.

CPT违规：查找内容和位置

CPT Violation: What and where to look for

在这篇评论中，我分类CPT违反的可能方式，我简要地描述了他们的现象，在地球和天体物理实验，包括反物质工厂，中性介子和中微子，并讨论了各种敏感性。我还注意解开真正的量子引力引起的CPT违反“假”违反由于普通物质的影响。当CPT不变性的破坏是通过幺正性破坏时，一个特别有趣的情况出现了，在这个意义上，物质理论被看作是一个有效场论，与退相干的量子引力"环境“纠缠在一起。在这种情况下，由于另一个数学定理，量子力学CPT算子定义不好，并且具有与CPT相关联的新颖效应。

Hints of R-parity violation in B decays into $τν$

In this article we show that the recently observed enhanced semi-leptonic and leptonic decay rates of the B meson into τνmodes can be explained within the frame work of R-parity violating (RPV) MSSM. In particular, RPV contributions involving the exchange of right-handed down-type squarks give a universal contribution to the B+ --> τν, B --> D τνand the B --> D* τνdecays. We find that the masses and couplings that explain the enhanced B decay rates are phenomelogically viable and the squarks can possibly be observed at the LHC.

Experimental hint for gravitational CP violation

An equality of particle and antiparticle gravitational interactions holds in general relativity and is supported by indirect observations. Gravity dependence on rotation or spin direction is experimentally constrained for non-relativistic matter. Here a method based on high energy Compton scattering is developed to measure the gravitational interaction of accelerated charged particles. Within that formalism the Compton spectra measured at HERA rule out the speculated anti-gravity possibility for antimatter at a confidence level close to 100%. The same data, however, imply a gravitational CP vi…

Tevatron对撞机上CP破坏测量的展望

Prospects in CP violation measurements at the Tevatron Collider

费米实验室的Tevatron对撞机是目前最丰富的b-强子来源，这要归功于1.96 TeV ppbar碰撞中的大b-bbar产生截面。最近的探测器升级允许广泛的CP破坏和味道混合测量，完全竞争（自标记模式的不对称性）或互补（B_s和b-重子衰变的不对称性）与B-工厂。在本文中，我们回顾了一些最近的CP破坏的结果，从DO和CDF合作，我们讨论了未来的测量前景。

$R_{D^{(*)}}$ anomaly: A possible hint for natural supersymmetry with $R$-parity violation

Recently, several $B$-physics experiments have reported an appreciable deviation from the Standard Model (SM) in the tree-level observables $R_{D^{(*)}}$; the combined weighted average now stands at $\approx 4 σ$. We first show the anomaly necessarily implies model-independent collider signals of the form $pp \to b τν$ that should be expediously searched for at ATLAS/CMS as a complementary test of the anomaly. Next we suggest a possible interconnection of the anomaly with the radiative stability of the Standard Model Higgs boson and point to a minimal effective supersymmetric scenario with $R$…

新物理学与未来B工厂

New Physics and Future B Factories

进一步的实验和理论研究的物理风味和CP破坏是很好的动机。在超对称框架内，更高精度的测量将允许探索具有更强普适性的模型类别：首先，没有普适性的模型，例如对齐或重的前两个夸克代;第二，具有近似普适性的模型，例如量子优势或AMSB;最后是精确普适性的模型，例如GMSB。一个广泛的计划，包括各种罕见的过程或CP不对称的B，D和K衰变，将提供详细的信息，可行的扩展标准模型。描述了未来B物理实验的一些亮点（目前积分亮度为0.5 ab^{-1}的B工厂、强子机和未来的高光度B工厂）。

$b\to sτ^+τ^-$ Physics at Future $Z$ Factories

$b\to sτ^+τ^-$ measurements are highly motivated for addressing lepton-flavor-universality (LFU)-violating puzzles such as $R_{K^{(\ast)}}$ anomalies. The anomalies of $R_{D^{(*)}}$ and $R_{J/ψ}$ further strengthen their necessity and importance, given that the LFU-violating hints from both involve the third-generation leptons directly. $Z$ factories at the future $e^-e^+$ colliders stand at a great position to conduct such measurements because of their relatively high production rates and reconstruction efficiencies for $B$ mesons at the $Z$ pole. To fully explore this potential, we pursue a …

CKM相位测量

CKM Phase Measurements

最近的实验结果CP破坏在B部门的BABAR和BELLE，实验在不对称的e+e-B-工厂，总结在这些会议录。从这些测量中得到的酉三角形顶点位置的约束允许测试标准模型中CP破坏的CKM解释。

线性对撞机Z工厂的电弱和CP破坏物理

Electroweak and CP violation physics at a Linear Collider Z-factory

未来的直线对撞机，如TESLA，可能能够以非常高的亮度和极化的电子和正电子束在Z0共振上运行。研究了高精度测量电弱量的可能性。可以预期相对于当前精度的巨大改进，特别是对于可以利用光束偏振的不对称性A_LR和A_b。Z到bbbar事件的非常大的样本也允许研究各种CP破坏的b衰变。CKM么正性三角角的精确度可以与b工厂和未来强子对撞机的实验相媲美。

Search for CP violation In B0-B0bar mixing using partial reconstruction of B0bar -> D*+Xl-nubar and kaon tagging

We describe in detail a previously published measurement of CP violation induced by B0-anti B0 oscillations, based on an integrated luminosity of 425.7 fb-1 collected by the BABAR experiment at the PEPII collider. We apply a novel technique to a sample of about 6 million B0bar -> D*+ l- nubar decays selected with partial reconstruction of the D*+ meson. The charged lepton identifies the flavor of one B meson at its decay time, the flavor of the other B is determined by kaon tagging. We determine a CP violating asymmetry ACP = (0.0006 +- 0.0017 + 0.0038 - 0.0032). This measurement is consistent…

Hadron physics potential of future high-luminosity B-factories at the Upsilon(5S) and above

We point out the physics opportunities of future high-luminosity B-factories at the Upsilon(5S) resonance and above. In this paper we discuss numerous interesting investigations, which can be performed in the e+e- centre-of-mass energy region from the Upsilon(5S) and up to 11.5 GeV, where an efficient data taking operation should be possible with the planned B-factories. These studies include abundant Bs production and decay properties; independent confirmation and if found, exhaustive exploration of Belle's claimed charged bottomonia; clarification of puzzles of interquarkonium dipion transit…

味物理与CP破坏

Flavor Physics and CP Violation

这是针对实验高能物理领域的研究生的三个系列讲座的书面版本。重点是与$B$ -工厂相关的物理学。所涉及的主要议题是：（i）标准模型的味区;（ii）混合参数的确定;（iii）介子衰变中的CP破坏（与模型无关的描述）;（iv）标准模型中的CP破坏;（v）作为新物理学探索的CP破坏。

标准模型中的美及其超越

Beauty in the Standard Model and Beyond

对B系统CP破坏的研究使我们能够对标准模型中的CP对称性进行定量检验。B工厂和Tevatron积累的大量实验数据使得对幺正三角形的边长和角度的许多精确测量成为可能。我回顾了标准模型对CP破坏的描述以及使我们能够将CP破坏研究作为新物理学探测器的关键测量。

CP Violation and the Future of Flavor Physics

With the nearing completion of the first-generation experiments at asymmetric $e^+ e^-$ colliders running at the $Υ(4S)$ resonance ("B-Factories") a new era of high luminosity machines is at the horizon. We report here on the plans at KEK in Japan to upgrade the KEKB machine ("SuperKEKB") with the goal of achieving an instantaneous luminosity exceeding $8 \times 10^{35}$ cm$^{-2}$ s$^{-1}$, which is almost two orders of magnitude higher than KEKB. Together with the machine, the Belle detector will be upgraded as well ("Belle-II"), with significant improvements to increase its background tolera…

CP-violating Higgs Di-tau Decays: Baryogenesis and Higgs Factories

We demonstrate how probes of CP-violating observables in Higgs di-tau decays at prospective future lepton colliders could provide a test of weak scale baryogenesis with significant discovery potential. Measurements at the Circular Electron Positron Collider, for example, could exclude a CP phase larger than $2.9^\circ$ ($5.6^\circ$) at 68% (95%) C.L. assuming the Standard Model value for magnitude of the tau lepton Yukawa coupling. Conversely, this sensitivity would allow for a $5\,σ$ discovery for 82% of the CP phase range $[0,2π)$. The reaches of the Future Circular Collider - ee and Interna…

Explaining the hints for lepton flavour universality violation with three $S_2$ leptoquark generations

Leptoquarks are prime candidates for explaining the intriguing hints for lepton flavour universality violation. In particular, the $SU(2)_L$ doublet of scalar leptoquarks $S_2$ is capable of providing an explanation for the tensions between the measurements and the Standard Model predictions in $(g-2)_μ$, $b\to s\ell^+ \ell^-$ and $b\to cτν$ processes, as well as in non-resonant di-electron production. However, in the minimal setup with a single leptoquark generation, a common explanation for all these issues is not possible as this would lead to unacceptably large charged lepton flavour viola…

sin（2 beta）的测量

The measurement of sin(2beta)

自从1964年第一次观测以来，CP破坏一直是标准模型最难以捉摸的方面之一。CDF合作报告了B系统CP破坏的第一个证据，使用了世界上最大的$B \to J/ψK^0_S $衰变样本。sin $(2β)$ =0.79 $^{+0.41}_{-0.44}$（组合统计误差和系统误差）的直接测量值与标准模型预测值一致。在不久的将来，从B工厂和Tevatron升级实验中收集的新数据应该可以更精确地测量$\sin 2β$。

CP破坏和CKM矩阵：评估非对称B工厂的影响

CP Violation and the CKM Matrix: Assessing the Impact of the Asymmetric B Factories

我们更新CKM矩阵的轮廓。酉三角形的顶点（rhobar，etabar）通过全局拟合给出。我们建议其中包括sin 2alpha从CP违反不对称性在B 0->rho+rho-，使用同位旋来区分企鹅的贡献。简要讨论了ε ′/ε ′的约束。我们研究了稀有衰变K+->pi+nunu-bar的测量和KL-> pi 0 nunubar的未来观测的影响。详细研究了B系统，从B 0->D（*）+-pi-+和B+->D（*）0 K+的2 β + γ和γ开始。本文的一个重要部分是致力于B衰变到pipi，Kpi，rhopi和rhorho。各种现象学和理论方法进行了研究。在QCD因子分解，我们发现一个显着的协议的pipi和Kpi数据与其他UT约束。一个适合的QCD FA的所有pipi和Kpi数据导致相关的观测值的精确预测。我们分别分析了B->Kpi衰变，特别是响应最近的唯象讨论的电弱企鹅的影响。我们发现对电弱参数和强子参数没有显着的限制。我们没有观察到新物理学的任何明确迹象，而有一些潜在的大的再散射效应的证据。最后，我们使用一个模型独立的描述的BBbar混合和B衰变，即在b->d和b->s胶子企鹅振幅的一大类新物理效应，进行一个新的数值分析。重要的非标准校正不能排除，但在大多数情况下，标准解决方案是有利的。

（夸克）味物理学对新物理学的启示

Summary of hints for new physics from (quark) flavour physics

最近出现了两个新物理学的线索：B_s混合相phi_s和D_s ->（mu，tau）nu的速率分别暴露出与标准模型的\sim 3 σ和3.8 σ偏差。此外，在带电和中性模式之间的B -> K π中的CP不对称性的差异在5.3 σ水平，这比预期的稍大。phi_s或A_CP（B -> K pi）中的新物理将与最小味违反假设相矛盾。后者最近引起了人们的注意，因为没有偏离CP和味违反夸克部门。

中性D介子衰变中的D^0- \bar{D}^0混合和CP破坏

D^0-\bar{D}^0 Mixing and CP Violation in Neutral D-meson Decays

粲星系中D^0- \bar{D}^0在可检测水平上的混合或显著的CP破坏可能强烈地表明新物理的存在。鉴于固定靶实验、B介子工厂和τ粲工厂等实验所带来的巨大发现潜力，我们进一步研究了中性$D$ -介子衰变中D^0- \bar{D}^0混合和CP破坏的唯象.推导了相干和非相干D ^0 \bar{D}^0事件的随时间变化和时间积分衰变率的通用公式，并给出了它们直到混合参数x_D和y_D的二阶的近似表达式。我们讨论了中性D衰变到半轻子末态、强子CP本征态、强子非CP本征态和CP禁戒态时的D^0- \bar{D}^0混合和各种CP破坏信号。本文提出了一些分别确定x_D和y_D以及证明粲区直接和间接CP不对称性的非平凡方法。

A $L_μ- L_τ$ theory of Higgs flavor violation and $(g-2)_μ$

Several experiments reported hints for the violation of lepton flavor or lepton flavor universality in processes involving muons. Most prominently, there is the hint for a non-zero rate of the flavor violating Higgs decay $h \to τμ$ at the LHC, as well as the hint for lepton flavor universality violation in rare $B$ meson decays at LHCb. In addition, also the long standing discrepancy in the anomalous magnetic moment of the muon motivates new physics connected to muons. A symmetry which violates lepton flavor universality, is $L_μ-L_τ$: the difference of muon-number and tau-number. We show tha…

B meson decays and CP (and T) violation

The prolific field of B meson decays and CP violation is illustrated in a few examples of recent results: The measurement of the CKM unitarity angle $β= ϕ_1$, the measurement of a significant violation of time reversal symmetry, an unexplained isospin asymmetry in penguin decays, a hint on scalar charged bosons from the semileptonic B decay to the heavy lepton $τ$, and B decays to baryons.

超tau魅工厂的物理与前景

The Physics and Prospects of Super-Tau Charm Factories

超tau魅工厂是一种高亮度电子-正电子对撞机，能精确测量魅子性质、CP破坏及非微扰QCD现象，为标准模型检验和新物理探索提供独特机遇。

排斥半轻子B衰变的极化测量和T破坏

Polarization Measurements and T-Violation in Exclusive Semileptonic B Decays

我们提供了一个一般的分析的时间反演不变性破坏的排他性半轻子B衰变B到Dlnu和B到D* lnu。轻子极化和D* 极化的测量可以用来寻找和识别T破坏的非标准模型源。在超对称的R宇称守恒和R宇称破缺理论中，以及在标准模型的一些非超对称扩展中，包括多Higgs偶线模型、leptoquark模型和左右对称模型，T奇偏振观测量都有上限。值得注意的是，这些模型中的许多模型允许大的T违反极化效应，这可能是在计划的B工厂的范围内。

Branching ratio measurements and isospin violation in B-meson decays

The approximate symmetry of the strong interactions under isospin transformations is among the most precise tools available to control hadronic matrix elements. It is crucial in extracting fundamental parameters, but also provides avenues for the search of phenomena beyond the Standard Model. The precision of the resulting predictions requires special care when determining the quantities they are to be tested with. Specifically, in the extraction of branching ratios often isospin symmetry is assumed at one point or another implicitly, implying a significant bias for precision analyses. We extr…