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Permanent electric dipole moments (EDMs) of fundamental particles such as the electron are signatures of parity and time-reversal violation due to physics beyond the standard model. EDM measurements probe new physics at energy scales well…

Atomic Physics · Physics 2020-10-09 Mohit Verma , Andrew M. Jayich , Amar C. Vutha

We study the impact of present and future $(g-2)_\mu$ measurements on supersymmetric models. The corrections to $(g-2)_\mu$ become particularly relevant in the presence of light sleptons, charginos and neutralinos, especially in the large…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. Carena , G. F. Giudice , C. E. M. Wagner

Recently, the Muon g-2 experiment at Fermilab has measured the muon anomalous magnetic dipole moment (MDM), $a_\mu=(g_\mu-2)/2$, which reported that the new experimental average increases the tension between experiment and the standard…

High Energy Physics - Phenomenology · Physics 2022-06-01 Hai-Bin Zhang , Chang-Xin Liu , Jin-Lei Yang , Tai-Fu Feng

Some phenomenological aspects of a supersymmetric model for fermion mass hierarchy proposed previously are discussed. It is required that the lepton universality violation is near to its current experimental bound. The lepton number…

High Energy Physics - Phenomenology · Physics 2009-10-28 Chun Liu

In light of the ongoing effort on reducing the theoretical uncertainties and an upcoming experiment concerning muon magnetic moment, we perform a detailed study of an 3-4-1 electroweak gauge extension of the standard model that contains…

High Energy Physics - Phenomenology · Physics 2015-11-26 D. Cogollo

We give a thorough analysis of the correlation between the muon anomalous magnetic moment and the radiative lepton flavor violating (LFV) processes within the minimal supersymmetric standard model. We find that in the case when the slepton…

High Energy Physics - Phenomenology · Physics 2011-09-13 Xiao-Jun Bi , Yu-ping Kuang , Yong-Hong An

Standard Model contributions to the electron, muon, and tau lepton anomalous magnetic moments, a_l=(g_l-2)/2, are reviewed and updated. The fine structure constant is obtained from the electron g_e-2 and used to refine the QED contribution…

High Energy Physics - Phenomenology · Physics 2009-10-31 Andrzej Czarnecki , William J. Marciano

In the unconstrained MSSM, we reanalyze the constraints on the phases of supersymmetric flavour conserving couplings that follow from the electron and neutron electric dipole moments (EDM). We find that the constraints become weak if at…

High Energy Physics - Phenomenology · Physics 2009-10-31 S. Pokorski , J. Rosiek , C. A. Savoy

In the context of supersymmetry, the two-loop Barr-Zee diagrams which induce CP-violating electric dipole moment of electron due to superpartners simultaneously yield CP-conserving magnetic dipole moment of muon. In this paper, we derive…

High Energy Physics - Phenomenology · Physics 2019-03-01 Sibo Zheng

It has been argued, that in noncommutative field theories sizes of physical objects cannot be taken smaller than an elementary length related to noncommutativity parameters. By gauge-covariantly extending field equations of noncommutative…

High Energy Physics - Theory · Physics 2011-11-01 T. C. Adorno , D. M. Gitman , A. E. Shabad , D. V. Vassilevich

Effects of supersymmetric particles may appear in various low energy experiments through loop diagrams. We discuss various flavor changing neutral current processes, the muon anomalous magnetic moment and lepton flavor violation in the…

High Energy Physics - Phenomenology · Physics 2007-05-23 Yasuhiro Okada

We show how an intermediate gauge symmetry breaking scale can be a source of lepton flavor violation and EDM of electron and neutron in SUSY GUTs. The Universal soft supersymmetry breaking operators can be introduced at the GUT scale or…

High Energy Physics - Phenomenology · Physics 2007-05-23 N. G. Deshpande , B. Dutta , E. Keith

A number of predictions were made in von Buddenbrock et al (2016 Eur. Phys. J. C 76, 10, 580) pertaining to the anomalous production of multiple leptons at the Large Hadron Collider. Discrepancies in multi-lepton final states have now…

High Energy Physics - Phenomenology · Physics 2020-04-17 Danielle Sabatta , Alan S. Cornell , Ashok Goyal , Mukesh Kumar , Bruce Mellado , Xifeng Ruan

We study an extension of the minimal gauged $L_{\mu}-L_{\tau}$ model in order to explain the anomalous magnetic moments of muon and electron simultaneously. Presence of an additional scalar doublet $\eta$ and an in-built $Z_2$ symmetry…

High Energy Physics - Phenomenology · Physics 2022-04-28 Debasish Borah , Manoranjan Dutta , Satyabrata Mahapatra , Narendra Sahu

We systematically analyze the anomalous dipole $\Delta k_{\gamma}$ and quadrupole $\Delta Q_{\gamma}$ moments of the W gauge bosons in the context of the minimal supersymmetric standard model as functions of the soft SUSY breaking…

High Energy Physics - Phenomenology · Physics 2009-09-25 A. B. Lahanas , V. C. Spanos

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

Due to large QED anomalous dimensions of the electric and magnetic dipole operators, the rate of the rare muon decay mu --> e+gamma is suppressed by the factor [ 1- 8 alpha/pi ln(Lambda/m_mu) ], independent of the physics responsible for…

High Energy Physics - Phenomenology · Physics 2008-11-26 Andrzej Czarnecki , Ernest Jankowski

Motivated by the large mixing angle solutions for the atmospheric and solar neutrino anomalies, flavor changing neutral current processes and lepton flavor violating processes as well as the muon anomalous magnetic moment are analyzed in…

High Energy Physics - Phenomenology · Physics 2014-11-17 Seungwon Baek , Toru Goto , Yasuhiro Okada , Ken-ichi Okumura

Physics beyond the standard model of electroweak interactions that violates lepton number will, in general, induce operators involving the quark and lepton fields that violate lepton number. I point out that some matrix elements of…

Nuclear Theory · Physics 2009-10-31 Martin J. Savage

The recent measurement on the muon anomalous magnetic moment $a_\mu$ shows a $2.6\sigma$ deviation from the standard model value. We show that it puts an interesting bound on the mass of the second generation leptoquarks. To account for the…

High Energy Physics - Phenomenology · Physics 2009-12-31 Kingman Cheung