The Glashow resonance in neutrino-photon scattering

Abstract

Reactions ${\nu }_l\gamma \to W^{+}{l}^{-}(l=e,\mu ,\tau )$ near the threshold $\sqrt{s}=m_W+m_l$ are analyzed. Two independent calculations of the corresponding cross sections (straightforward calculations using the Standard Electroweak Lagrangian and calculations in the framework of the parton model) are compared. It is shown that the Standard Electroweak Theory strongly suggests that these reactions proceed via the Glashow resonances. Accordingly, a hypothesis that the on-shell $W$ bosons in the reactions ${\nu }_l\gamma \to$$W^{+}{l}^{-}$ are the Glashow resonances is put forward. A role of these reactions for testing T symmetry at the IceCube Neutrino Observatory is discussed. A model with T-violating Glashow resonances for description of the distribution of the TeV-PeV neutrino events recently observed by the IceCube Collaboration is presented.

25 pages, 11 figures. Typos corrected, minor changes, new references added. Accepted for publication in PLB

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• Neutrino-nucleus cross sections for W-boson and trident production
• Measurement of the high-energy all-flavor neutrino-nucleon cross section with IceCube
• W-boson and trident production in TeV--PeV neutrino observatories
• Probing decaying heavy dark matter with the 4-year IceCube HESE data
• Boosted Dark Matter and its implications for the features in IceCube HESE data
• nuSQuIDS: A toolbox for neutrino propagation
• Hidden Glashow resonance in neutrino-nucleus collisions
• LeptonInjector and LeptonWeighter: A neutrino event generator and weighter for neutrino observatories
• Hunting the Glashow Resonance with PeV Neutrino Telescopes
• Double and multiple bangs at tau neutrino telescopes: A novel probe of sphalerons with cosmogenic neutrinos
• Charged lepton beams as a source of effective neutrinos
• Probing the Glashow resonance at electron-positron colliders