The Weak-Magnetic Moment of Heavy Quarks

Abstract

With initial and final particles on-shell, the anomalous weak-magnetic dipole moments of b and c quarks are electroweak gauge invariant quantities of the effective couplings Zb\bar{b} and Zc\bar{c}, respectively, and good candidates to test the Standard Model and/or new physics. Here we present a complete computation of these quantities within the Standard Model. We show that decoupling properties with respect to heavy particles do take place in the weak magnetic moment. The obtained values, a_b(M_Z^2)=(2.98-1.56i)x10^(-4) and a_c(M_Z^2)=(-2.80+1.09i)x10^(-5) are dominated by one-gluon exchange diagrams. The electroweak corrections are less than 1% of the total magnitude.

12 pages, 1 Postscript figure, LaTeX. 1 reference corrected. Published in Phys. Lett. B

Cited by in corpus (11)

• Top Dipole Form Factors and Loop-induced CP-violation in Supersymmetry
• Multilepton production via top flavour-changing neutral couplings at the CERN LHC
• One-loop MSSM Contribution to the Weak Magnetic Dipole Moments of Heavy Fermions
• QCD Corrections to Static Heavy Quark Form Factors
• Fermion Dipole Moments in Supersymmetric Models with Explicitly Broken R-parity
• Probing top quark electromagnetic dipole moments in single-top-plus-photon production
• Weak Magnetic Dipole Moments in the MSSM
• Tau weak dipole moments from azimuthal asymmetries
• The top-quark polarization beyond the Standard Model in electron-positron annihilation
• Weak dipole moments of heavy fermions with flavor violation induced by $Z^{\prime }$ gauge bosons
• Energy correlation of bottom quarks from decays of top quarks in electron$-$positron annihilation