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The leptonic branching fractions of the tau lepton are sensitive to anomalous charged current interactions. We use recent experimental measurements to determine the weak charged current magnetic and electric dipole moments and the Michel…

High Energy Physics - Phenomenology · Physics 2016-08-25 Maria-Teresa Dova , John Swain , Lucas Taylor

We study the charged lepton electric dipole moment which is induced by the scalar unparticle mediation and we predict the appropriate range for the free parameters appearing in the effective lagrangian which drives the unparticle-standard…

High Energy Physics - Phenomenology · Physics 2015-05-13 E. O. Iltan

In this study, we investigate the potential of the process $pp\rightarrow p\gamma^{*} p\rightarrow p \tau \bar{\nu}_{\tau}q^{\prime} X$ at the LHC to examine the anomalous electromagnetic moments of the tau lepton. We obtain $95\%$…

High Energy Physics - Phenomenology · Physics 2018-07-24 M. Köksal , S. C. İnan , A. A. Billur , M. K. Bahar , Y. Özgüven

We obtain limits on the electromagnetic and weak dipole moments of the tau-lepton in the framework of a Left-Right symmetric model (LRSM) and a class of $E_6$ inspired models with an additional neutral vector boson $Z_\theta$. Using as an…

High Energy Physics - Phenomenology · Physics 2008-11-26 A. Gutierrez-Rodriguez , M. A. Hernandez-Ruiz , M. A. Perez

We discuss upper limits on the electric dipole moments (EDM) of the tau-lepton, heavy quarks, and W-boson, which follow from the precision measurements of the electron and neutron EDM.

High Energy Physics - Phenomenology · Physics 2009-08-11 A. G. Grozin , I. B. Khriplovich , A. S. Rudenko

We review several aspects of flavour-diagonal CP violation, focussing on the role played by the electric dipole moments (EDMs) of leptons, nucleons, atoms and molecules, which consitute the source of several stringent constraints on new…

High Energy Physics - Phenomenology · Physics 2009-07-09 Maxim Pospelov , Adam Ritz

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…

High Energy Physics - Phenomenology · Physics 2016-10-11 N. Panza , Y. M. P. Gomes , J. A. Helayël

In a two Higgs doublet model with extra Yukawa couplings, we assess the new physics contributions to charged lepton electric dipole moment. We focus especially on muon (and tau) EDM where in the coming decade several experiments $-$ Muon…

High Energy Physics - Phenomenology · Physics 2022-10-25 Wei-Shu Hou , Girish Kumar , Sven Teunissen

Contributions to the muon anomalous magnetic moment are evaluated in the technicolor model with scalars and topcolor assisted technicolor model. In the technicolor model with scalars, the additional contributions come from the loops of…

High Energy Physics - Phenomenology · Physics 2009-11-07 Z. Xiong , J. M. Yang

The goal of this work is to provide a pedagogical introduction to dipole moments and dipole transitions in theories beyond the Standard Model, with a focus on the lepton sector. We emphasize the exceptional sensitivity of dipole observables…

High Energy Physics - Phenomenology · Physics 2025-09-19 Nicola Valori , Oscar Vives

An analysis of electroweak corrections to the anomalous dipole moments of lepton from some special two-loop diagrams where a closed neutralino/chargino loop is inserted into relevant one-loop diagrams of the standard model is presented in…

High Energy Physics - Phenomenology · Physics 2008-11-26 Tai-Fu Feng , Lin Sun , Xiu-Yi Yang

We calculate the electric dipole moment for the electron and neutron in the framework of the 3-3-1 model with heavy charged leptons. We assume that the only source of $CP$ violation arises from a complex trilinear coupling constant and the…

High Energy Physics - Phenomenology · Physics 2015-01-13 G. De Conto , V. Pleitez

We calculate the squared matrix element for the process e+ e- --> tau+ tau- gamma allowing for anomalous magnetic and electric dipole moments at the tau tau gamma vertex. No interferences are neglected and no approximations of light fermion…

High Energy Physics - Phenomenology · Physics 2010-01-15 S. S. Gau , T. Paul , J. Swain , L. Taylor

We perform a model-independent analysis of the magnetic and electric dipole moments of the muon and electron. We give expressions for the dipole moments in terms of operator coefficients of the low-energy effective field theory (LEFT) and…

High Energy Physics - Phenomenology · Physics 2021-11-12 Jason Aebischer , Wouter Dekens , Elizabeth E. Jenkins , Aneesh V. Manohar , Dipan Sengupta , Peter Stoffer

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…

High Energy Physics - Phenomenology · Physics 2009-11-19 Kingman Cheung , Otto C. W. Kong , Jae Sik Lee

In this paper we present the complete expressions of the lepton and neutron electric dipole moments (EDMs) in the Standard Model Effective Field Theory (SMEFT), up to 1-loop and dimension-6 level and including both RG running contributions…

High Energy Physics - Phenomenology · Physics 2023-01-16 Jonathan Kley , Tobias Theil , Elena Venturini , Andreas Weiler

The most stringent bounds on the anomalous magnetic and electric dipole moments of the tau lepton was derived by Escribano and Mass\'{o}[6] from the Z width at LEP in an effective lagrangian approach to the new physics. In this paper we…

High Energy Physics - Phenomenology · Physics 2009-10-31 Tao Huang , Zhi-Hai Lin , Xinmin Zhang

We study the connection between charged lepton electric dipole moments, $d_l$ $(l=e,\mu,\tau)$, and seesaw neutrino mass generation in a simple two Higgs doublet extension of the Standard Model plus three right-handed neutrinos (RHN) $N_a$,…

High Energy Physics - Phenomenology · Physics 2009-11-10 We-Fu Chang , John N. Ng

We obtain bounds on the anomalous magnetic and electric dipole moments of the tau-neutrino through the reaction $e^{+}e^{-}\to \nu \bar \nu \gamma$ at the $Z_1$-pole in the framework of a Left-Right symmetric model and a class of $E_6$…

High Energy Physics - Phenomenology · Physics 2011-03-23 A. Gutierrez-Rodriguez , M. A. Hernandez-Ruiz , B. Jayme-Valdes , M. A. Perez

We establish model independent bounds on the anomalous magnetic and electric dipole moments of the tau-lepton using the two-photon processes $\gamma\gamma \to \tau^+\tau^-$ and $\gamma\gamma \to \tau^+\tau^-\gamma$. We use ${\cal L}=10, 50,…

High Energy Physics - Phenomenology · Physics 2018-07-18 M. Koksal , A. A. Billur , A. Gutierrez-Rodriguez , M. A. Hernandez-Ruiz