CP violation and electric-dipole-moment at low energy tau-pair production

Abstract

CP violation at low energy is investigated at the tau electromagnetic vertex. High statistics at B factories, and on top of the Upsilon resonances, allows a detailed investigation of CP-odd observables related to the tau-pair production. The contribution of the tau electric dipole moment is considered in detail. We perform an analysis independent from the high energy data by means of correlation and linear spin observables at low energy. We show that different CP-odd asymmetries, associated to the normal-transverse and normal-longitudinal correlation terms can be measured at low energy accelerators, both at resonant and non resonant energies. These observables allow to put stringent and independent bounds to the tau electric dipole moment that are competitive with other high or low energy results.

arXiv comment18 pages, 2 figures, references added, minor changes in section 3 and 5, to be published in Nucl.Phys.B

References in corpus (9)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Evidence for oscillation of atmospheric neutrinos
• Search for the Electric Dipole Moment of the tau Lepton
• One-loop Effective Lagrangian for a Standard Model with a Heavy Charged Scalar Singlet
• Improved Bounds on the Electromagnetic Dipole Moments of the Tau Lepton
• Model independent bounds on the tau lepton electromagnetic and weak magnetic moments
• Tau Kinematics from Impact Parameters
• The tau weak-magnetic dipole moment
• A Search for the Electric Dipole Moment of the Tau-Lepton

Cited by in corpus (12)

• Effective Theory Analysis of Precision Electroweak Data
• Tau anomalous magnetic moment form factor at Super B/Flavor factories
• Search for the Electric Dipole Moment and anomalous magnetic moment of the tau lepton at tau factories
• Towards testing the magnetic moment of the tau at one part per million
• Tau spin correlations and the anomalous magnetic moment
• CP violation and electric-dipole-moment at low energy $\tau$ production with polarized electrons
• Constraining $\tau$-lepton dipole moments and gluon couplings at the LHC
• Prediction for CP Violation via Electric Dipole Moment of $\tau$ Lepton in $\gamma \gamma \to {\tau }^{+}{\tau }^{-}$ Process at CLIC
• Effective Theories and Electroweak Precision Constraints
• Spin correlations and new physics in $\tau$-lepton decays at the LHC
• Spin correlations in $\tau$-lepton pair production due to anomalous magnetic and electric dipole moments
• Light new physics and the $\tau$ lepton dipole moments: prospects at Belle II