Decay of cosmic global string loops

Saurabh, Ayush; Vachaspati, Tanmay; Pogosian, Levon

doi:10.1103/PhysRevD.101.083522

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 ($$\chi$$) 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.

Authors:

Saurabh, Ayush;

;

Publication Date:: Tue Apr 14 00:00:00 EDT 2020

Research Org.:: Arizona State Univ., Tempe, AZ (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1631892

Alternate Identifier(s):: OSTI ID: 1608959

Grant/Contract Number:: SC0019470

Resource Type:: Published Article

Journal Name:: Physical Review D

Additional Journal Information:: Journal Name: Physical Review D Journal Volume: 101 Journal Issue: 8; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; cosmic strings & domain walls; axions

Citation Formats


                    Saurabh, Ayush, Vachaspati, Tanmay, and Pogosian, Levon. Decay of cosmic global string loops.  United States: N. p., 2020. 
Web.  doi:10.1103/PhysRevD.101.083522.

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                    Saurabh, Ayush, Vachaspati, Tanmay, & Pogosian, Levon. Decay of cosmic global string loops.  United States.  https://doi.org/10.1103/PhysRevD.101.083522

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                    Saurabh, Ayush, Vachaspati, Tanmay, and Pogosian, Levon. Tue .  
"Decay of cosmic global string loops".  United States.  https://doi.org/10.1103/PhysRevD.101.083522.

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@article{osti_1631892,

  title        = {Decay of cosmic global string loops},

  author       = {Saurabh, Ayush and Vachaspati, Tanmay and Pogosian, Levon},

  abstractNote = {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.},

  doi          = {10.1103/PhysRevD.101.083522},

  journal      = {Physical Review D},

  number       = 8,

  volume       = 101,

  place        = {United States},

  year         = {Tue Apr 14 00:00:00 EDT 2020},

  month        = {Tue Apr 14 00:00:00 EDT 2020}

}

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Works referenced in this record:

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Title: Decay of cosmic global string loops

Abstract

Citation Formats

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Axion String Constraints journal, November 1994

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Radiation of Goldstone bosons from cosmic strings
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On the evolution of global strings in the early universe
journal, September 1987

Improved estimation of radiated axions from cosmological axionic strings
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Cosmic axions from cosmic strings
journal, November 1986

Axion radiation from strings
journal, May 2001

The dark-matter axion mass
journal, November 2017

Stability of the iterated Crank-Nicholson method in numerical relativity
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Do axions need inflation?
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Global string radiation
journal, July 1994