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Decay of Cosmic Global String Loops

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arxiv 2001.01030 v1 pith:F34M3NEF submitted 2020-01-04 hep-ph astro-ph.COhep-th

classification hep-phastro-ph.COhep-th
keywords loopsstringapproxcosmicdecayglobalgoldstonepeak
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We numerically study the decay of cosmic global string loops due to radiation of Goldstone bosons and massive scalar ($\chi$) particles. The length of loops we study range from 200-1000 times the width of the string core. We find that the lifetime of a loop is $\approx 1.4 L$. The energy spectrum of Goldstone boson radiation has a $k^{-1}$ fall off, where $k$ is the wavenumber, and a sharp peak at $k \approx m_\chi/2$, where $m_\chi$ is the mass of $\chi$. The latter is a new feature and implies a peak at high energies (MeV-GeV) in the cosmological distribution of QCD axions.

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Cited by 8 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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