arXiv 1609.024452016-09-08hep-phhep-th

An investgation on the electron's EDM from the electron's MDM

N. Panza, Y. M. P. Gomes, J. A. Helayël

英文摘要：

We pursue, in this contribution, an investigation of the contribution of the electron's magnetic dipole moment (MDM) to the electron's electric dipole moment (EDM) (or the charged leptons, more generally) in the framework of the Born-Infeld Electrodynamics and in a gravity background with a non-vanishing cosmological constant, where CP-symmetry is broken down. Our point of view consist in associating a non-trivial EDM to a non-symmetry of the charge distribution of the elementary particle under consideration. The bound on the electron's EDM published in 2014 is used to constrain the coupling parameter of the electromagnetic sector to the scalar curvature of the space-time in the case we consider gravity to be responsible for the asymmetry in the distribution.

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。

阅读原文

阅读 PDF ↗

arXiv 页面 ↗HTML 原文 ↗

本文内容

英文摘要相关论文

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

相关论文

Constraining EDM and MDM lepton dimension five interactions in the electroweak sector

We investigate dimension five Lorentz-violating nonminimal interactions in the electroweak sector, in connection with the possible generation of electric dipole moment (EDM), weak electric dipole moment (WEDM), magnetic dipole moment (MDM) and weak magnetic dipole moment (WMDM) for leptons. These couplings are composed of the physical fields and LV tensors of ranks ranging from 1 to 4. The CPT-odd couplings do no generate EDM\ behavior and do not provide the correct MDM\ signature, while the CPT-even ones yield EDM and MDM\ behavior, being subject to improved constraining. Tau lepton experimen…

2020-01-17hep-phhep-th

General CPT-even dimension-five nonminimal couplings between fermions and photons yielding EDM and MDM

In this letter, we examine a new class of CPT-even nonminimal interactions, between fermions and photons, deprived of higher order derivatives, that yields electric dipole moment (EDM) and magnetic dipole moment (MDM) in the context of the Dirac equation. The couplings are dimension-five CPT-even and Lorentz-violating nonminimal structures, composed of a rank-2 tensor, $T_{μν}$, the electromagnetic tensor, and gamma matrices, being addressed in its axial and non-axial Hermitian versions, and also comprising general possibilities. We then use the electron's anomalous magnetic dipole moment and …

2016-07-14hep-phhep-th

Study on muon MDM and lepton EDM in BLMSSM via the mass insertion approximation

In the framework of the MSSM extension with local gauged baryon and lepton numbers (BLMSSM), we calculate the muon anomalous magnetic dipole moment (MDM) and lepton $(e, μ, τ)$ electric dipole moment (EDM), and discuss how the muon MDM and lepton EDM depend on the parameters within the mass insertion approximation. Among many parameters, $\tanβ$,~$g_L$,~$m_L$ and $μ_H$ are more sensitive parameters for $a^{BL}_μ$. Considering the experimental limitations, our best numerical result of $a^{BL}_μ$ is around $2.5 \times 10^{-9}$, which can well compensate the departure between the experiment data …

2023-03-05hep-ph

Lepton Dipole Moments and Rare Decays in the CP-violating MSSM with Nonuniversal Soft-Supersymmetry Breaking

We investigate the muon anomalous magnetic dipole moment (MDM), the muon electric dipole moment (EDM) and the lepton-flavour-violating decays of the $τ-$lepton, $τ\to μγ$ and $τ\to 3μ$, in the CP-violating Minimal Supersymmetric Standard Model (MSSM) with nonuniversal soft-supersymmetry breaking. We evaluate numerically the muon EDM and the branching ratios $B(τ\to μγ)$ and $B(τ\to 3μ)$, after taking into account the experimental constraints from the electron EDM and muon MDM. Upon imposition of the experimental limits on our theoretical predictions for the aforementioned branching ratios and …

2003-05-26hep-ph

Reflecting on chirality: CP-violating extensions of the single scalar-leptoquark solutions for the $(g-2)_{e,μ}$ puzzles and their implications for lepton EDMs

We study the two scalar leptoquarks capable of generating chirally-enhanced, sign-dependent contributions to lepton magnetic dipole moments (MDMs) and electric dipole moments (EDMs), $R_2\sim (\mathbf{3}, \mathbf{2}, 7/6)$ and $S_1\sim (\mathbf{3}, \mathbf{1}, -1/3)$. We consider the case in which the electron and muon sectors are decoupled, and leptoquark couplings are assigned complex values. Adopting the coupling ansatz that the electron dipole operator is generated by charm-containing loops, and muon dipole operator by top-containing loops, we find that both minimal leptoquark models remai…

2022-01-05hep-ph

Electric and anomalous magnetic dipole moments of the muon in the MSSM

We study the electric dipole moment (EDM) and the anomalous magnetic dipole moment (MDM) of the muon in the CP-violating Minimal Supersymmetric extension of the Standard Model (MSSM). We take into account the contributions from the chargino- and neutralino-mediated one-loop graphs and the dominant two-loop Higgs-mediated Barr-Zee diagrams. We improve earlier calculations by incorporating CP-violating Higgs-boson mixing effects and the resummed threshold corrections to the Yukawa couplings of the charged leptons as well as that of the bottom quark. The analytic correlation between the muon EDM …

2009-05-15hep-ph

更多相关论文收起更多论文

超越动力学混合的矢量暗物质吸收

Absorption of Vector Dark Matter Beyond Kinetic Mixing

本文首次研究矢量暗物质通过电子磁/电偶极矩耦合的吸收信号，计算多种晶体与原子靶标的直接探测率，并更新EXCEED-DM给出冻结产生模型约束。

2023-08-15astro-ph.COhep-ph

Lepton electric and magnetic dipole moments via lepton flavor violating spin-1 unparticle interactions

The magnetic dipole moment (MDM) and the electric dipole moment (EDM) of leptons are calculated under the assumption of lepton flavor violation (LFV) induced by spin-1 unparticles with both vector and axial-vector couplings to leptons,including a CP-violating phase. The experimental limits on the muon MDM and LFV process such as the decay l_i->i_jl_kl_k are then used to constrain the LFV couplings for particular values of the unparticle operator dimension d_U and the unparticle scale Λ_U, assuming that LFV transitions between the tau and muon leptons are dominant. It is found that the current …

2011-09-22hep-ph

Electromagnetic properties of dark matter: dipole moments and charge form factor

A neutral dark matter particle may possess an electric dipole moment (EDM) or a magnetic dipole moment (MDM), so that its scattering with nuclei is governed by electromagnetic interactions. If the moments are associated with relevant operators of dimension-5, they may be detectable in direct search experiments. We calculate complete expressions of the scattering cross sections and the recoil energy spectra for dark matter with these attributes. We also provide useful formulae pertinent to dark matter that interacts via an electric charge form factor (CFF) which is related to the charge radius …

2010-12-02astro-ph.COhep-exhep-ph

电偶极矩的实验与唯象学

Experiments and phenomenology of electric dipole moments

针对宇宙物质与反物质不平衡问题，本文提议将电偶极矩（EDM）实验扩展至重子等粒子，通过LHC弯晶实验和LHCb数据分析测量相关极化，并推导重夸克EDM界限以探讨新物理模型的唯象学意义。

2024-07-27hep-exhep-ph

超周边重离子碰撞中 τ 粒子对产生的自旋不对称性与偶极矩

Spin asymmetry and dipole moments in $τ$-pair production with ultraperipheral heavy ion collisions

本研究提出利用超周边重离子碰撞中相干光子的方位角不对称性，同时约束 τ 轻子的 MDM 与 EDM，显著缩小新物理参数空间。

2024-04-10hep-exhep-phnucl-ex

Electromagnetic dipole moment and time reversal invariance violating interactions for high energy short-lived particles in bent and straight crystals at Large Hadron Collider

A channelled particle, which moves in a crystal, alongside with electromagnetic interaction also experiences weak interaction with electrons and nuclei, as well as strong interaction with nuclei. Measurements of polarization vector and angular distribution of particles scattered by axes (planes) of unbent crystal enable to obtain limits for the EDM value and for values of constants describing P- and T-odd interactions. The same measurements also allow studying magnetic dipole moment of charged and neutral particles. Investigation of left-right asymmetry by the use of two unbent crystals makes …

2018-12-02hep-exhep-ph

Dipole Moment Dark Matter at the LHC

Monojet and monophoton final states with large missing transverse energy (${\not E}_T$) are important for dark matter (DM) searches at colliders. We present analytic expressions for the differential cross sections for the parton-level processes, $q\bar{q}(qg)\to g(q)χ\barχ$ and $q\bar{q}\to γχ\barχ$, for a neutral DM particle with a magnetic dipole moment (MDM) or an electric dipole moment (EDM). We collectively call such DM candidates dipole moment dark matter (DMDM). We also provide monojet cross sections for scalar, vector and axial-vector interactions. We then use ATLAS/CMS monojet${+\not …

2012-09-16astro-ph.COhep-exhep-ph

标准模型扩展中CPT破缺电弱规范部分对带电轻子电磁性质的影响

CPT-Odd effects on the electromagnetic properties of charged leptons in the Standard Model Extension

本研究分析标准模型扩展中CPT破缺电弱规范部分的LV系数对带电轻子电磁性质的影响，推导其对MDM和EDM的贡献及约束，并基于电子EDM实验限制得到新物理标度上限。

2024-11-27hep-ph

探究τ子g-2和EDM的虚部及其q²依赖性

Probing the imaginary parts and their $q^2$ dependences for the tau $g-2$ and EDM

Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University（上海交大李政道学院与物理天文学院）；Hangzhou Institute for Advanced Study, UCAS（中国科学院大学杭州高等研究院）

本文通过模型无关的SMEFT和完整的2HDM模型，研究τ子反常磁偶极矩和电偶极矩的q²依赖性及虚部产生机制，提出实验方法提取偶极形状因子的实部和虚部，并表明Belle II和STCF可将a_τ的当前界限提高一个数量级以上。

2026-09-14hep-ph

中微子电荷半径和电磁偶极矩：通过标量和矢量轻夸克

Neutrino charge radius and electromagnetic dipole moments via scalar and vector leptoquarks

本文通过有效拉格朗日方法计算了标量和矢量轻夸克对中微子电磁性质的单圈贡献，首次给出有效电荷半径，并发现$\widetilde{R}_2$和$U_1$表示可产生最大贡献，τ中微子磁偶极矩可达$10^{-9}$ $μ_B$。

2024-02-05hep-ph

Bounds on Dipole Moments of hidden Dark Matter through kinetic mixing

The existence of dark sectors, consisting of weakly-coupled particles that do not interact with the known Standard Model forces, is theoretically and phenomenologically motivated. The hidden particles are candidates for Dark Matter and can interact with photon through electric dipole moment (EDM) and magnetic dipole moment (MDM). We investigate the possibility a hidden sector's Dark Matter which is charged under a hidden $U(1)_X$ gauge symmetry can interact with photon at loop level. We evaluate the scattering cross section of hidden Dirac fermion with nuclei and set bounds for dipole moment. …

2020-06-16hep-ph