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An automatic system to calculate two loop weak corrections to muon anomalous magnetic moment is discussed. Diagrams are classified into eight types, according to their topology. Adopting Civitanovi\'c-Kinoshita representation of Feynman…

高能物理 - 唯象学 · 物理学 2019-08-15 Toshiaki KANEKO , Nobuya NAKAZAWA

The current $3.5\sigma$ discrepancy between experimental and Standard Model determinations of the anomalous magnetic moment of the muon $a_\mu=(g-2)/2$ can only be extended to the discovery $5\sigma$ regime through a reduction of both…

We describe a new technique (presented in arXiv:1403.1778) to determine the contribution to the anomalous magnetic moment (g-2) of the muon coming from the hadronic vacuum polarisation using lattice QCD. Our method uses Pad\'{e}…

We calculate the one-loop effective potential for Horava-Lifshitz-like QED and Yukawa-like theory for arbitrary values of the critical exponent and the space-time dimension.

高能物理 - 理论 · 物理学 2013-01-28 C. F. Farias , J. R. Nascimento , A. Yu. Petrov

The two-loop electroweak corrections to the anomalous magnetic moment of the muon, generated by fermionic loops, are calculated. An interesting role of the top quark in the anomaly cancellation is observed. New corrections, including terms…

高能物理 - 唯象学 · 物理学 2010-01-15 Andrzej Czarnecki , Bernd Krause , William J. Marciano

We calculate supersymmetric two-loop corrections to the anomalous magnetic moment of the muon, consisting of diagrams with a closed scalar fermion or fermion loop and gauge and/or Higgs boson exchange. We discuss the numerical impact of…

高能物理 - 唯象学 · 物理学 2010-04-05 S. Heinemeyer , D. Stöckinger , G. Weiglein

We review some of the issues that arise in attempts to compute the hadronic corrections to the muon anomalous magnetic moment using Lattice QCD. We concentrate on the dominant contribution, which requires an accurate evaluation of the…

高能物理 - 格点 · 物理学 2015-06-18 Christopher Aubin , Thomas Blum , Maarten Golterman , Kim Maltman , Santiago Peris

We study the radiative corrections of the noncommutative QED at the one-loop level. A correction of the magnetic dipole moment due to the noncommutativity are evaluated. As in the ordinary QED, IR divergence is shown to vanish when we…

高能物理 - 理论 · 物理学 2007-05-23 Ki Boum Eom , Sung-Shig Kang , Bum-Hoon Lee , Chanyong Park

We study the effects of an anomalous Z' boson on the anomalous magnetic moment of the muon (g-2), and especially the impact of its axial coupling. We mainly evaluate the negative contribution to (g-2) of such couplings at one-loop and look…

高能物理 - 唯象学 · 物理学 2023-03-01 Pascal Anastasopoulos , Kunio Kaneta , Elias Kiritsis , Yann Mambrini

We present a calculation of magnetic moments for selected spin-1 mesons using the techniques of lattice QCD. This is carried out by introducing progressively small static magnetic field on the lattice and measuring the linear response of a…

高能物理 - 格点 · 物理学 2008-11-26 F. X. Lee , S. Moerschbacher , W. Wilcox

We investigate the form factors of the chiral-odd nucleon matrix element of the tensor current. In particular, we aim at the anomalous tensor magnetic form factors of the nucleon within the framework of the SU(3) and SU(2) chiral…

高能物理 - 唯象学 · 物理学 2014-11-21 Tim Ledwig , Antonio Silva , Hyun-Chul Kim

We present a summary of the results of two recent precise calculations of the muon anomalous magnetic moment ($g_{\mu}-2$) and the electromagnetic coupling on the $Z$ ($\bar{\alpha}_{\rm Q.E.D.}(M^2_{Z})$). The main sources of uncertainty…

高能物理 - 唯象学 · 物理学 2007-05-23 J. F. de Trocóniz , F. J. Ynduráin

We discuss, within the framework of the Standard Model, the calculation of the two-loop electroweak contributions to the anomalous magnetic moment of the muon involving triangle fermionic loops of leptons and quarks. Because of the large…

高能物理 - 唯象学 · 物理学 2008-11-26 S. Peris , M. Perrottet , E. de Rafael

The Proca-Corben-Schwinger equations for a spin-1 particle with an anomalous magnetic moment are added by a term describing an electric dipole moment, then they are reduced to a Hamiltonian form, and finally they are brought to the…

高能物理 - 唯象学 · 物理学 2013-04-26 Alexander J. Silenko

We go through several previous corrections and contributions to the muon $g-2$, starting from the dark photon hypothesis to the dark Z. We explore the inputs from a dark Z boson virtual mediator in a first order loop. We consider not only…

高能物理 - 唯象学 · 物理学 2023-10-24 Jorge Gamboa , Justo López-Sarrión , Fernando Méndez , Natalia Tapia Arellano

After a brief self-contained introduction to the muon anomalous magnetic moment, (g-2), we review the status of lattice calculations of the hadronic vacuum polarization contribution and present first results from lattice QCD for the…

高能物理 - 格点 · 物理学 2013-01-15 T. Blum , M. Hayakawa , T. Izubuchi

We present a lattice calculation of the leading hadronic contribution to the anomalous magnetic moment of the muon. This work is based on a subset of the CLS ensembles with $N_f = 2+1$ dynamical quarks and a quenched charm quark. Noise…

Three--loop contributions to massive QED vacuum polarization are evaluated by a combination of analytical and numerical techniques. The first three Taylor coefficients, at small $q^2$, are obtained analytically, using $d$\/--dimensional…

高能物理 - 唯象学 · 物理学 2007-05-23 P. A. Baikov , D. J. Broadhurst

Using the effective Lagrangian method, we analyze the 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 two Higgs doublet…

高能物理 - 唯象学 · 物理学 2008-11-26 Tai-Fu Feng , Lin Sun , Xiu-Yi Yang

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…

高能物理 - 唯象学 · 物理学 2008-11-26 Tai-Fu Feng , Lin Sun , Xiu-Yi Yang