Jay D. Tasson
A brief introduction to the Standard-Model Extension (SME) approach to testing CPT and Lorentz symmetry is provided. Recent proposals for tests with antimatter are summarized, including gravitational and spectroscopic tests.
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。
继续探索
Antimatter-Gravity Couplings, and Lorentz Symmetry
可能的CPT和洛伦兹违反反物质引力实验以及其他反物质测试的影响被认为是在一般的基于场理论的框架的标准模型扩展（SME）的背景下。
Lorentz and CPT Tests in Matter and Antimatter
本文综述了近年来在原子和粒子系统中研究洛伦兹对称性和CPT对称性检验的理论工作。在物质和反物质的各种测试进行了讨论，包括测量异常磁矩在潘宁陷阱，原子钟转换的比较，高精度的光谱测量氢和反氢，实验与介子，实验与介子，和测试洛伦兹对称性与自旋极化扭摆。
Gravity Effects on Antimatter in the Standard-Model Extension
引力标准模型扩展（SME）是分析CPT和洛伦兹破坏的一般场论框架。在这项工作中，我们总结了洛伦兹和CPT违反的背景下，中小企业的反物质引力的影响。各种尝试的影响，把间接限制异常反物质引力被认为是在基于SME的模型的背景下。
Antimatter Gravity and Antihydrogen Production
某些现代引力理论预测，反物质在地球引力场中的下落方式与物质不同。然而，反物质的引力实验并不存在，所有从物质实验中得出的结论在某种程度上都依赖于特定的模型。我们已经提出了一种直接的测量方法，将反质子的引力加速度与带负电的氢离子的引力加速度进行比较。这项实验的发展已经取得了实质性进展。基于我们的工作，提出了一些测量带电和中性反物质的"$g$“的替代方案。我们总结了我们的实验现状，并讨论了在适合重力测量的环境中产生反氢所需的步骤。
We propose a method by which one could use modified antimatter gravity experiments in order to perform a high-precision test of antimatter charge neutrality. The proposal is based on the application of a strong, external, vertically oriented electric field during an antimatter free-fall gravity experiment in the gravitational field of the Earth. The proposed experimental setup has the potential to drastically improve the limits on the charge-asymmetry parameter ${\overline ε}_q$ of antimatter. On the theoretical side, we analyze possibilities to describe a putative charge-asymmetry of matter a…
Lorentz and CPT tests involving antiprotons
洛伦兹和CPT测试涉及在低温下的物质-反物质的比较进行了讨论。SME对这类系统跃迁频率的预测包括物质-反物质差异和恒星变化。在氢-反氢光谱学中，1 S-2S跃迁和1 S塞曼跃迁中可能存在前导级效应，可以用来获得干净的约束。类似地，紧边界可以从涉及反质子的潘宁阱实验中确定。
Probing Lorentz-violating scalar forces and dark matter with precision matter and antimatter experiments
本文探索洛伦兹破缺标量场模型，其可增强对标量场对反物质的影响，并指出通过光谱学、干涉测量及反物质实验进行暗物质搜寻等精密测试的机会。
Antimatter, the SME, and Gravity
标准模型扩展（SME）为CPT和洛伦兹破坏的分析提供了一个通用的场论框架。这项工作讨论了一些基于SME的CPT和洛伦兹对称性测试的建议，包括反氢光谱和反物质引力测试。
Testing Antimatter Couplings with Spectroscopy
本研究利用氢与反氢光谱及高电荷离子，探究洛伦兹破缺标量介导势对光谱的影响，获得标量质量 $m_\phi \gtrsim 400\\:\mathrm{keV}$ 下反物质耦合的最强实验室约束，并估算了天体物理约束。
Matter-Antimatter Asymmetry Generated by Loop Quantum Gravity
我们表明，环量子引力提供了新的机制，通过该机制，在宇宙中观察到的物质-反物质不对称性可以自然地出现在低于大统一尺度的温度。这是通过引入一个新的长度尺度${\cal L}$，远大于普朗克长度（$l_P$），以获得半经典的编织状态的理论。这种依赖于粒子动量的尺度改变了费米子不同螺旋度的色散关系，导致轻子不对称。
Investigating Lorentz and CPT Symmetry with Antihydrogen
这个演讲讨论了CPT和洛伦兹对称性测试的理论方面，这些测试原则上可以用被捕获的反氢进行。这个框架是标准模型的扩展，它以一般的方式承认CPT和洛伦兹对称性的微小违反，而不放弃粒子物理学标准模型的其他特征。氢和反氢的光谱转换，表现出领先的顺序效应被确定。反物质的光谱频率与常规物质的相应频率的这种比较将约束参数组合，而这些参数组合仅用常规物质原子无法获得。
CPT and Lorentz violation as signatures for Planck-scale physics
近年来，时空对称性的破缺被认为是普朗克尺度唯象学中一个很有前途的研究领域。例如，已知量子引力问题的各种理论方法都可以容纳CPT不变性的微小违反。本讲座涵盖了该研究领域内的各种主题。特别是，一些机制的时空对称性破缺以及标准模型扩展（SME）测试框架将进行审查; CPT和洛伦兹不变性之间的联系，在量子场论将被曝光;和各种实验CPT测试，重点是物质-反物质的比较将进行讨论。
Antimatter interferometry for gravity measurements
我们描述了一个光脉冲原子干涉仪，它适用于任何种类的原子，甚至电子和质子以及它们的反粒子，特别是用于测试爱因斯坦等效原理与反氢。该设计通过远离谐振布拉格分束器消除了对谐振激光器的需要，并通过磁约束和原子再循环有效地利用了稀缺的原子。对于反氢原子的自由降落的加速，我们期望达到优于1%的初始精度，这可以提高到百万分之一的水平。
Support for Gravitationally-Attractive Composite Antimatter and Gravitationally-Repulsive Non-composite Antimatter
本文指出ALPHA实验仅测量了复合反物质（反氢）的引力效应，提出价反夸克等非复合反物质可能受地球引力排斥，并建议通过反夸克与引力场直接相互作用实验及AMS-01数据验证。
CPT and Lorentz-invariance violation
我们在基本层面上理解自然的最大差距可能是对引力和量子理论的统一描述。虽然目前有各种各样的理论方法来解决这个问题，但这一领域的实验研究受到量子引力效应的普朗克尺度抑制的抑制。然而，时空对称性的破坏最近被认为是这方面的一个有希望的信号：许多基础物理模型可以容纳微小的洛伦兹和CPT破坏，并且这种效应可以进行超高精度的测试。本报告将概述这一主题。主题，如动机，中小企业测试框架，相对论故障的机制，和实验测试将进行审查。重点是涉及反物质的观测。
General relativity (GR) is the current description of gravity in modern physics. One of the cornerstones of GR, as well as Newton's theory of gravity, is the weak equivalence principle (WEP), stating that the trajectory of a freely falling test body is independent of its internal structure and composition. WEP is known to be valid for the normal matter with a high precision. However, due to the rarity of antimatter and weakness of the gravitational forces, the WEP has never been confirmed for antimatter. The current direct bounds on the ratio between the gravitational and inertial masses of th…
Lorentz Symmetry and Matter-Gravity Couplings
这篇论文的贡献总结了最近的调查洛仑兹违反物质引力耦合。
Lorentz Violation and Gravity
这个演讲概述了在洛伦兹和CPT违反标准模型扩展的背景下，局部洛伦兹违反引力理论的一些结果。
Lorentz Breaking and Gravity
具有洛伦兹破坏的引力理论必须考虑许多可能的特征，以便在理论上和唯象上保持一致。这里给出了这些特征的简要概述。它们包括回避一个不去定理，自发洛伦兹破缺和类质破缺之间的联系，无质量的南武-戈德斯通模式和大质量希格斯模式的出现，以及希格斯机制在引力中的可能性。
In four-space-time dimensional string/brane theory, obtained either through compactification of the extra spatial dimensions, or by appropriate restriction to brane worlds with three large spatial dimensions, the rich physics potential associated with the presence of non-trivial Kalb-Ramond (KR) axion-like fields has not been fully exploited so far. In this talk, I discuss a scenario whereby such fields produce spontaneous Lorentz- and CPT-violating cosmological backgrounds over which strings propagate, which in the early Universe can lead to Baryogenesis through Leptogenesis in models with he…
Experimental tests of the newtonian inverse square law at short range, one at Indiana University and the other at the Huazhong University of Science and Technology, have been used to set limits on Lorentz violation in the pure gravity sector of the nonminimal Standard-Model Extension. In the nonrelativistic limit, the constraints derived for the 14 independent SME coefficients for Lorentz violation acting simultaneously are of order $10^{-9}$ m$^{2}$.
Implications of a matter-antimatter mass asymmetry in Penning-trap experiments
本文比较K介子振荡与Penning阱实验对CPT不变性的限制，证明前者给出的夸克–反夸克质量差约束远强于后者，并提出若精密实验发现CPT破坏时重构标准模型理解的路线图。
The gravitational acceleration of antimatter, $\bar g$, has yet to be directly measured but could change our understanding of gravity, the Universe, and the possibility of a fifth force. Three avenues are apparent for such a measurement: antihydrogen, positronium, and muonium, the last requiring a precision atom interferometer and benefiting from a novel muonium beam under development. The interferometer and its few-picometer alignment and calibration systems appear to be feasible. With 100 nm grating pitch, measurements of $\bar g$ to 10%, 1%, or better can be envisioned. This could constitut…
Lorentz-violating theories of gravity typically contain constrained vector fields. We show that the lowest-order coupling of such vectors to $\mathrm{U}(1)$-symmetric scalars can naturally give rise to baryogenesis in a manner akin to the Affleck-Dine mechanism. We calculate the cosmology of this new mechanism, demonstrating that a net $B-L$ can be generated in the early Universe, and that the resulting baryon-to-photon ratio matches that which is presently observed. We discuss constraints on the model using solar system and astrophysical tests of Lorentz violation in the gravity sector. Gener…
Lorentz and CPT violation and the hydrogen and antihydrogen molecular ions II -- hyperfine-Zeeman spectrum
通过研究氢分子离子和反氢分子离子的超精细塞曼谱，探讨洛伦兹和CPT破坏在质子部分的高灵敏度检测，结合旋轨耦合效应分析。
Lorentz and CPT violation and the hydrogen and antihydrogen molecular ions I -- rovibrational states
通过分析氢分子离子的转动振动谱，研究洛伦兹和CPT不变性在低能有效理论中的表现，利用氢和反氢的高精度跃迁频率提高对基本对称性的测试。
We consider Lorentz-symmetry properties of the ghost-free massive gravity theory proposed by de Rham, Gabadadze, and Tolley. In particular, we present potentially observable effects in gravitational-wave propagation and in Newton's law, including Lorentz-violating signals.
General violations of Lorentz symmetry can be described by the Standard-Model Extension (SME) framework. The SME predicts modifications to existing physics and can be tested in high-precision experiments. By looking for small deviations from Newton gravity, short-range gravity experiments are expected to be sensitive to possible gravitational Lorentz-violation signals. With two group's short-range gravity data analyzed recently, no nonminimal Lorentz violation signal is found at the micron distance scale, which gives stringent constraints on nonminimal Lorentz-violation coefficients in the SME…
This contribution to the CPT'19 meeting provides a brief overview of recent theoretical studies of nonminimal Lorentz violation in linearized gravity. Signatures in gravitational waves from coalescing compact binaries are discussed.
The Newton limit of gravity is studied in the presence of Lorentz-violating gravitational operators of arbitrary mass dimension. The linearized modified Einstein equations are obtained and the perturbative solutions are constructed and characterized. We develop a formalism for data analysis in laboratory experiments testing gravity at short range and demonstrate that these tests provide unique sensitivity to deviations from local Lorentz invariance.
Short-range gravity and Lorentz violation
相对较少的搜索已被执行违反当地洛伦兹不变性在纯重力部门。我们表明，测试短程引力是敏感的广泛的一类无约束和新颖的信号，依赖于实验的几何形状和恒星时间。
Many new linearized coefficients for Lorentz violation are discovered in our recent work on the construction of a generic Lorentz-violating effective field theory in curved spacetime. The new coefficients can be constrained by experiments in weak gravity fields. In this work, we compare experiments in different gravitational potentials and study three types of gravity-related experiments: free-fall, gravitational interferometer, and gravitational bound-state experiments. First constraints on the new coefficients for Lorentz violation are extracted from those experiments.
The recent advent of high precision antihydrogen spectroscopy opens the way to stringent experimental tests of the fundamental principles underlying particle physics and general relativity (GR), such as Lorentz and CPT invariance and the Einstein Equivalence Principle (EEP), on pure antimatter systems. In this paper, the nature and implications of these tests is investigated, with special reference to the ALPHA antihydrogen programme at CERN. This is underpinned by a theoretical review of the role of antiparticles, causality and fundamental symmetries in relativistic quantum field theory (QFT)…
Lorentz violation in the linearized gravity
我们研究了在线性化引力中引入洛伦兹破坏修正项的一些后果，它导致真空中引力波色散关系的修正。我们还讨论了可能的机制诱导这样一个长期的拉格朗日。
We construct the general Lorentz-violating effective field theory in curved spacetime and the corresponding nonrelativistic Hamiltonian in the Earth's gravitational field. Applying this general framework to three types of experiments, free-dropping, interferometer, and bound-state experiments, we extract first constraints on certain new coefficients in the matter-gravity sector.
Search for Lorentz Violation in a Short-Range Gravity Experiment
牛顿平方反比定律在短距离的实验测试已被用来设置在标准模型扩展的纯重力部门的洛伦兹破坏的限制。考虑到平面测试质量几何形状，名义上为零，相对于平方反比力，洛伦兹破坏的SME系数的限制是在s ~ 10000的数量级上。
Constraints on violations of Lorentz symmetry from Gravity Probe B
我们使用重力探测器B的最终结果为标准模型扩展的引力扇区设置了新的上限，包括第一次与新场的时间-时间分量相关的系数，该分量负责在理论中诱导局部洛伦兹破坏。
Lorentz breaking effective field theory models for matter and gravity: theory and observational constraints
量子引力的许多不同方法至少部分地以它们对洛伦兹对称性的处理为唯象特征，特别是在最小尺度上对称性是精确的还是修改的/破缺的。例如，弦论通常保持洛伦兹对称性，而模拟引力和Lifshitz模型在微观尺度上打破了它。在洛仑兹对称性破缺的模型中，有大量的约束条件限制偏离洛仑兹不变性，这些约束条件可以通过在物质和引力领域采用有效场论的技术，用低能实验来建立。我们将在这里审查的低能有效场论方法洛仑兹打破这些部门和现有的观测提供的各种限制。
Lorentz invariance and quantum gravity: an additional fine-tuning problem?
试图将标准的量子场论与引力结合起来，会导致普朗克长度1.6*10^{-35} m附近的通常时空结构的崩溃，并可能违反洛伦兹不变性。对量子引力中优先标架效应的计算进一步激发了对洛伦兹破坏的高精度搜索。在这里，我们解释说，结合已知的基本粒子相互作用与普朗克尺度的首选框架会导致洛伦兹破坏的百分比水平，约20个数量级以上，比以前的估计，除非裸参数的理论是不自然的强烈微调。因此，一个重要的任务不仅是提高精度的搜索违反洛伦兹不变性，但也寻找理论机制，自动保持洛伦兹不变性。
Diffeomorphism-invariant noncommutative gravity with twisted local Lorentz invariance
本文提出了一种新的非对易时空引力理论，它在一般坐标变换下是不变的，而局部洛伦兹不变性则是通过扭曲的规范对称性来实现的。与现有的非对易引力公式相比，我们的理论要简单得多。
Quantum Gravity, Cosmology, (Liouville) Strings and Lorentz Invariance
我回顾了非临界弦的某些方面，与量子引力的洛伦兹不变性破坏方法有关。我还讨论了如何非临界弦可能提供一个统一的框架，弦宇宙学和量子引力可以一起处理。
Matter-gravity couplings and Lorentz violation
研究了存在Lorentz和CPT破坏时物质的引力耦合。在Lorentz破坏系数的首阶，相对论量子哈密顿量是由引力耦合最小标准模型推广导出的。对于自旋无关效应，得到了非相对论性量子哈密顿量和测试体与源体的经典动力学。发展了一种系统微扰方法来处理Lorentz破坏和Minkowski背景下的小尺度和系数涨落。建立了后牛顿度规和存在洛仑兹破坏的重力作用下自由落体的运动轨迹。一个说明性的例子是大黄蜂模型。一般的方法是用来确定可观察到的信号的洛伦兹和CPT违反各种引力实验和观测，包括重力仪测量，实验室和卫星测试的弱等效原理，反物质的研究，太阳系观测和调查的引力性质的光。在现有的或不久的将来的实验中，洛伦兹破坏系数的许多灵敏度可以达到10 ^3分之一到10^{15}分之一的水平。某些系数在引力搜索中是唯一可检测的，至今仍未测量。
Lorentz and diffeomorphism violations are studied in linearized gravity using effective field theory. A classification of all gauge-invariant and gauge-violating terms is given. The exact covariant dispersion relation for gravitational modes involving operators of arbitrary mass dimension is constructed, and various special limits are discussed.
Clock-comparison experiments are among the sharpest existing tests of Lorentz symmetry in matter. We characterize signals in these experiments arising from modifications to electron or nucleon propagators and involving Lorentz- and CPT-violating operators of arbitrary mass dimension. The spectral frequencies of the atoms or ions used as clocks exhibit perturbative shifts that can depend on the constituent-particle properties and can display sidereal and annual variations in time. Adopting an independent-particle model for the electronic structure and the Schmidt model for the nucleus, we deter…
Local Lorentz-Symmetry Breaking and Gravity
基于拉格朗日的标准模型扩展框架提供了一个广泛的描述可能的引力效应从局部洛伦兹破坏。在这次演讲中，我回顾了这一领域的理论和现象学工作的现状。本文讨论了线性化重力场中已有结果在非线性区域的推广。
Lorentz symmetry is an important concept in modern physics. Precision pulsar timing was used to put tight constraints on the coefficients for Lorentz violation in the pure-gravity sector of the Standard-Model Extension (SME). We extend the analysis to Lorentz-violating matter-gravity couplings, utilizing three small-eccentricity relativistic neutron star (NS) -- white dwarf (WD) binaries. We obtain compelling limits on various SME coefficients related to the neutron, the proton, and the electron. These results are complementary to limits obtained from lunar laser ranging and clock experiments.
Search for Lorentz violation in short-range gravity
对两个相距约80微米的平面钨振子之间的力的恒星变化的研究，为涉及黎曼曲率二次耦合的洛伦兹破坏设定了第一个实验极限，与$10^{-7}$ m $^2$的水平没有影响一致。
Phenomenology of theories of gravity without Lorentz invariance: the preferred frame case
没有洛伦兹不变性的引力理论是量子引力低能描述的候选者。在这篇评论中，我们将描述候选人的现象学后果与存在的首选时间方向
We explore the interplay of matter with quantum gravity with a preferred frame to highlight that the matter sector cannot be protected from the symmetry-breaking effects in the gravitational sector. Focusing on Abelian gauge fields, we show that quantum gravitational radiative corrections induce Lorentz-invariance-violating couplings for the Abelian gauge field. In particular, we discuss how such a mechanism could result in the possibility to translate observational constraints on Lorentz violation in the matter sector into strong constraints on the Lorentz-violating gravitational couplings.
Short-range experiments testing the gravitational inverse-square law at the submillimeter scale offer uniquely sensitive probes of Lorentz invariance. A combined analysis of results from the short-range gravity experiments HUST-2015, HUST-2011, IU-2012, and IU-2002 permits the first independent measurements of the 14 nonrelativistic coefficients for Lorentz violation in the pure-gravity sector at the level of $10^{-9}$ m$^2$, improving by an order of magnitude the sensitivity to numerous types of Lorentz violation involving quadratic curvature derivatives and curvature couplings.
Quantum Gravity Phenomenology and Lorentz Violation
如果量子引力违反了洛伦兹对称性，那么观测指导理解量子引力的前景将大大改善。本文简要回顾了以前的工作洛仑兹破坏（LV）和讨论方面的参数化LV效应的有效场论框架。总结了目前对LV的观测限制，重点是E/M_Planck阶QED的影响。
Testing Lorentz Invariance Violation in Quantum Gravity Theories
近年来，人们对量子引力效应引起的洛伦兹破坏进行了大量的研究。在理论方面，圈量子引力和弦论都预言，在接近普朗克尺度的能量下可以诱导洛伦兹破坏。另一方面，近年来的大多数实验结果，已经以非常高的精度证实了物理定律在低能下是洛伦兹不变量的。包含一个和两个回路的贡献从洛伦兹违反拉格朗日戏剧性地改变了上述图片：圈动量运行到普朗克尺度和以上，并从“发散”项有限洛伦兹违反贡献的一阶出现。这些可以通过适当的反拉格朗日项抑制，产生一个强大的微调问题。下面简要讨论这些问题及其在未来研究中可能产生的影响。
Lorentz Violation in Emergent Gravity and Its Cosmological Consequences
本文通过将广义相对论视为涌现引力中的简并奥托循环，引入做功支路导致局域洛伦兹不变性和能量动量守恒的受控破缺，从而解释晚期宇宙加速，并讨论了对宇宙常数问题、结构形成和局域观测的影响。
扫码添加微信好友，提出您的宝贵建议 👇
💡 备注请填写：网站反馈
发表机构由 AI 从论文文本抽取，如发现错误，欢迎反馈修正建议。