Constraints on the cosmic string loop collapse fraction from primordial black holes - INSPIRE

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Constraints on the cosmic string loop collapse fraction from primordial black holes

Chloe James-Turner
(
- U. Nottingham
)
,
Danton P.B. Weil
(
- U. Nottingham
)
,
Anne M. Green
(
- U. Nottingham
)
,
Edmund J. Copeland
(
- U. Nottingham
)

Nov 28, 2019

5 pages

Published in:

Phys.Rev.D 101 (2020) 12, 123526

Published: Jun 23, 2020

e-Print:

1911.12658 [astro-ph.CO]

DOI:

10.1103/PhysRevD.101.123526

View in:

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Abstract: (APS)

A small fraction, f, of cosmic string loops can collapse to form primordial black holes (PBHs). Constraints on the abundance of PBHs can therefore be used to constrain f. We update these calculations, taking into account the PBH extended mass function, and find f<10-31(Gμ/c2)-3/2. This is roughly 1 order of magnitude tighter than previous constraints. The improvement from the tighter constraints on the abundance of PBHs is partly offset by refinements to the theoretical calculation of the cosmic string loop formation rate.

Note:

5 pages, v2: takes into account only a fraction of string network energy goes into long loops, constraints consequently weakened by one order of magnitude (thank you to referee for pointing this out) + other minor changes

Cosmology
black hole: primordial
cosmic string
collapse
formation

References(29)

Figures(0)

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