Absolute neutrino mass from helicity measurements

Abstract

The possibility to access the absolute neutrino mass scale through the measurement of the wrong helicity contribution of charged leptons is investigated in pion decay. Through this method, one may have access to the same effective mass $m_{\beta }^2$ extractable from the tritium beta decay experiments for electron neutrinos as well as the analogous effective mass $(m_{{\nu }_{\mu }}^2{)}_{\mathrm{eff}}$ for muon neutrinos. In the channel ${\pi }^{-}\to e^{-}\bar{\nu }$, the relative probability of producing an antineutrino with left helicity is enhanced if compared with the naive expectation $(m_{\nu }/2E_{\nu }{)}^2$. The possibility to constrain new interactions in the context of Two-Higgs-Doublet models is also investigated.

v2: References and comments added. v3: reference numbers changed. Accepted for Mod. Phys. Lett. A

References in corpus (8)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Oscillating neutrinos and mu --> e, gamma
• Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints
• Physical parameters and basis transformations in the Two-Higgs-Doublet model
• Constraints on Scalar Couplings from ${\pi }^{\pm }\to l^{\pm }{\nu }_l$
• Neutrino Anti-neutrino Transitions
• Katrin - Direct Measurement of Neutrino Masses in the Sub-Ev Region
• Flavor mixing in a Lee-type model

Cited by in corpus (2)

• Quantum flavor oscillations extended to the Dirac theory
• Intrinsic flavor violation for massive neutrinos