Cosmic Strings as Emitters of Extremely High Energy Neutrinos

Abstract

We study massive particle radiation from cosmic string kinks, and its observability in extremely high energy neutrinos. In particular, we consider the emission of moduli --- weakly coupled scalar particles predicted in supersymmetric theories --- from the kinks of cosmic string loops. Since kinks move at the speed of light on strings, moduli are emitted with large Lorentz factors, and eventually decay into many pions and neutrinos via hadronic cascades. The produced neutrino flux has energy $E\gtrsim 10^{11}\mathrm{GeV}$, and is affected by oscillations and absorption (resonant and non-resonant). It is observable at upcoming neutrino telescopes such as JEM-EUSO, and the radio telescopes LOFAR and SKA, for a range of values of the string tension, and of the mass and coupling constant of the moduli.

13 pages, 2 figures

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• Radio detection of Cosmic-Ray Air Showers and High-Energy Neutrinos
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• Cosmic Strings in Hidden Sectors: 2. Cosmological and Astrophysical Signatures
• Cosmic neutrino flux and spin flavor oscillations in intergalactic medium
• A limit on the ultra-high-energy neutrino flux from lunar observations with the Parkes radio telescope
• Seeking Neutrino Emission from AGN through Temporal and Spatial Cross Correlation
• High-Energy Astrophysical Neutrinos from Cosmic Strings
• The Sensitivity of PUEO to Cosmogenic Neutrinos and Exotic Physics Scenarios