@article{ff13da477fe842d79a37dac92a490ae4,
title = "Decay of cosmic global string loops",
abstract = "We numerically study the decay of cosmic global string loops due to radiation of Goldstone bosons and massive scalar (χ) particles. The length of loops we study range from 200 to 1000 times the width of the string core. We find that the lifetime of a loop is ≈1.4L. The energy spectrum of Goldstone boson radiation has a k-1 falloff, where k is the wave number, and a sharp peak at k≈mχ/2, where mχ is the mass of χ. The latter is a new feature and implies a peak at high energies (MeV-GeV) in the cosmological distribution of QCD axions.",
author = "Ayush Saurabh and Tanmay Vachaspati and Levon Pogosian",
note = "Funding Information: We gratefully acknowledge Daiju Matsunami{\textquoteright}s contributions to our earlier collaboration and thank Guy Moore, Ken Olum, Pierre Sikivie, and Alex Vilenkin for comments. A. S. and T. V. are supported by the U.S. Department of Energy, Office of High Energy Physics, under Award No. DE-SC0019470 at Arizona State University. L. P. is supported in part by the National Sciences and Engineering Research Council of Canada. The bulk of computations were performed on the Agave and Stampede2 clusters at Arizona State University and The University of Texas at Austin, respectively. Publisher Copyright: {\textcopyright} 2020 authors. Published by the American Physical Society.",
year = "2020",
month = apr,
day = "15",
doi = "10.1103/PhysRevD.101.083522",
language = "English (US)",
volume = "101",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "8",
}