TY - JOUR
T1 - Decay of Cosmic String Loops due to Particle Radiation
AU - Matsunami, Daiju
AU - Pogosian, Levon
AU - Saurabh, Ayush
AU - Vachaspati, Tanmay
N1 - Funding Information:
We thank the Lorentz Center for hosting the Topological Defects workshop where we had the opportunity to discuss these results with the participants, especially Jose Blanco-Pillado, Mark Hindmarsh, Ken Olum, Paul Shellard, and Daniele Steer. D. M. and L. P. are supported in part by the National Sciences and Engineering Research Council (NSERC) of Canada. 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. This research was enabled in part by support provided by WestGrid [29] and Compute Canada [30] . The bulk of the computations were performed on the Agave and Stampede2 clusters at Arizona State University and The University of Texas at Austin, respectively.
PY - 2019/5/20
Y1 - 2019/5/20
N2 - Constraints on the tension and the abundance of cosmic strings depend crucially on the rate at which they decay into particles and gravitational radiation. We study the decay of cosmic string loops in the Abelian-Higgs model by performing field theory simulations of loop formation and evolution. We find that our set of string loops emits particle radiation primarily due to kink collisions, and that the decay time due to these losses is proportional to Lp with p≈2 where L is the loop length. In contrast, the decay time to gravitational radiation scales in proportion to L, and we conclude that particle emission is the primary energy loss mechanism for loops smaller than a critical length scale, while gravitational losses dominate for larger loops.
AB - Constraints on the tension and the abundance of cosmic strings depend crucially on the rate at which they decay into particles and gravitational radiation. We study the decay of cosmic string loops in the Abelian-Higgs model by performing field theory simulations of loop formation and evolution. We find that our set of string loops emits particle radiation primarily due to kink collisions, and that the decay time due to these losses is proportional to Lp with p≈2 where L is the loop length. In contrast, the decay time to gravitational radiation scales in proportion to L, and we conclude that particle emission is the primary energy loss mechanism for loops smaller than a critical length scale, while gravitational losses dominate for larger loops.
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U2 - 10.1103/PhysRevLett.122.201301
DO - 10.1103/PhysRevLett.122.201301
M3 - Article
C2 - 31172736
AN - SCOPUS:85066823140
VL - 122
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 20
M1 - 201301
ER -