Bounding the magnetic and electric dipole moments of tau nu from the process e+e- --> nu bar nu gamma in E6 Superstring Models

Abstract

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 $E_6$ inspired models with an additional neutral vector boson $Z_{\theta }$. We use the data collected by the L3 Collaboration at LEP. For the parameters of the $E_6$ model we consider the mixing angle ${\theta }_{E_6}=37.8^o$ and $M_{Z_{\theta }}=7M_{Z_1}$. We find that our bounds are of the same order of magnitude as those obtained in other extensions of the Standard Model.

17 pages, 2 figure

References in corpus (4)

• New physics effects in rare Z decays
• Bounds on the magnetic moment and electric dipole moment of the $\tau$-neutrino via the process $e^{+}{e}^{-}\to \nu \bar{\nu }\gamma$
• CP violating effects in the decay Z -> mu^+mu^-gamma induced by ZZgamma and Zgammagamma couplings
• Bounding the Tau Neutrino Magnetic Moment from the Process E+ E- --> Gamma Nu Anti-Nu

Cited by in corpus (12)

• Limits on the Electromagnetic and Weak Dipole Moments of the Tau-Lepton in E_6 Superstring Models
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• Probing the ZZgamma and Zgammagamma Couplings Through the Process e+e- --> nu anti-nu gamma
• Bounds on the dipole moments of the tau-neutrino via the process $e^{+}{e}^{-}\to \nu \bar{\nu }\gamma$ in a 331 model
• Probing the electromagnetic dipole moments of the tau-neutrino in the $U(1{)}_{B-L}$ model at the ILC and CLIC energies
• Constraints on Left-Right Symmetric and $E_6$ Superstring Models from the Number of Light Neutrino Species
• The effects of lepton KK modes on the lepton electric dipole moments in the Randall Sundrum scenario
• Model-independent study for the tau-neutrino electromagnetic dipole moments in $e^{+}{e}^{-}\to {\nu }_{\tau }{\bar{\nu }}_{\tau }\gamma$ at the CLIC
• Model-independent sensibility studies for the anomalous dipole moments of the ${\nu }_{\tau }$ at the CLIC based $\gamma e^{-}$ colliders
• Bounds on dipole moments of tau-neutrino from single photon searches in $SU(4{)}_L\times U(1{)}_X$ model at CLIC and ILC energies
• The Bounds on the magnetic moment of the tau-neutrino via the process (e+e-)-->nunu(bar)gamma
• Bounds on the anomalous $HZ\gamma$ vertex arising from the process $e^{+}{e}^{-}\to {\tau }^{+}{\tau }^{-}\gamma$