Neutrino Decays and Neutrino Electron Elastic Scattering in Unparticle Physics

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dc.creatorZhou, Shun
dc.date2007-06-03
dc.date2007-10-30
dc.date.accessioned2026-07-07T11:16:34Z
dc.date.available2026-07-07T11:16:34Z
dc.descriptionFollowing Georgi's unparticle scheme, we examine the effective couplings between neutrinos and unparticle operators. As an immediate consequence, neutrinos become unstable and can decay into the unparticle stuff. Assuming the dimension transmutation scale is around $Λ^{}_{\cal U} \sim 1 ~{\rm TeV}$, we implement the cosmological limit on the neutrino lifetime to constrain the neutrino-unparticle couplings for different scaling dimensions $d$. In addition, provided that the electron-unparticle coupling is restricted due to the precise measurement of the anomalous magnetic moment of electron, we calculate the unparticle contribution to the neutrino-electron elastic scattering. It is more important to jointly deal with the couplings of the unparticle to the standard model particles rather than separately. Taking into account both electron- and neutrino-unparticle couplings, we find that the scaling dimension of the scalar unparticle should lie in the narrow range $1 < d < 2$ by requiring the observables to be physically meaningful. However, there is no consistent range of $d$ for the vector unparticle operator.
dc.description10 pages including 2 PS figures; v2: an error removed and the text rewritten; v3: minor changes, accepted for publication in Phys. Lett. B
dc.identifierhttps://arxiv.org/abs/0706.0302
dc.identifierhttp://arxiv.org/abs/0706.0302
dc.identifierPhys.Lett.B659:336-340,2008
dc.identifierdoi:10.1016/j.physletb.2007.10.081
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192715
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleNeutrino Decays and Neutrino Electron Elastic Scattering in Unparticle Physics
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