Constraints on neutrino-photon interactions from rare Z decays

Abstract

It is shown that the rare decays $Z\to \nu \overline{nu}\gamma$ and $Z\to \nu \bar{\nu }\gamma \gamma$ are useful to put model-independent bounds on neutrino-one-photon and neutrino-two-photon interactions. The results are then used to constrain the $\tau$ neutrino magnetic moment and the double radiative decay ${\nu }_j\to {\nu }_i\gamma \gamma$. It is found that the decay $Z\to \nu \overline{nu}\gamma$ gives a more stringent bound on the $\tau$ neutrino magnetic moment than that obtained from $Z\to \nu \bar{\nu }\gamma \gamma$; the latter decay in turn gives limits on the neutrino-two-photon interaction that are less stringent than those obtained for a sterile neutrino ${\nu }_s$ from the analysis of ${\nu }_{\mu }N\to {\nu }_{s}N$ conversion.

11 pages, 5 figures, elsart format

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Cited by in corpus (15)

• Search for electromagnetic properties of the neutrinos at the LHC
• New physics effects in rare Z decays
• Electromagnetic properties of the neutrinos in gamma-proton collision at the LHC
• Bounds on the magnetic moment and electric dipole moment of the $\tau$-neutrino via the process $e^{+}{e}^{-}\to \nu \bar{\nu }\gamma$
• Improved bounds on the dipole moments of the tau-neutrino at high-energy ${\gamma }^{\ast }{e}^{-}$ and ${\gamma }^{\ast }{\gamma }^{\ast }$ collisions: ILC and CLIC
• Bounding the magnetic and electric dipole moments of tau nu from the process e+e- --> nu bar nu gamma in E6 Superstring Models
• 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
• Search for electromagnetic properties of the neutrino in $\gamma e$ and $\gamma \gamma$ collisions at CLIC
• Cosmic Birefringence from Neutrino and Dark Matter Asymmetries
• Search for the electromagnetic properties of the neutrinos at the HL-LHC and the FCC-hh
• Rare decay Z --> neutrino antineutrino photon photon via quartic gauge boson couplings
• An estimate of the branching ratio for Z -> nu nubar gamma gamma
• Enhanced active-sterile neutrino polarizability at the intensity frontier
• The effect of electromagnetic properties of neutrinos on the photon-neutrino decoupling temperature