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2020

Decay of Cosmic Global String Loops

Saurabh, Ayush, Vachaspati, Tanmay, Pogosian, Levon

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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 $\chi$.

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R. A. Battye and E. P. S. Shellard, Nucl. Phys. B423
Cited in the paper.

Then

S. A. Teukolsky, Phys. Rev. D61
2000
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C. Hagmann, S. Chang, and P. Sikivie, Phys. Rev. D63
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T. Hiramatsu, M. Kawasaki, T. Sekiguchi, M. Yamaguchi, and J. Yokoyama, Phys. Rev. D83
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V. B. Klaer and G. D. Moore, JCAP 1711
2017
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URL https://ayushsaurabh.home.blog/2020/01/02/decay-of-cosmic-global-string-loops/
2020
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