The primordial black holes solution to the cosmological monopole problem

Recently, the pulsar timing array (PTA) collaborations, including CPTA, EPTA, NANOGrav, and PPTA, announced that they detected a stochastic gravitational wave background spectrum in the nHz band. This may be relevant to the cosmological phase transition suggested by some models. Magnetic monopoles a...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2024-01, Vol.84 (1), p.31-8, Article 31
Main Authors: Wang, Xin-Zhe, Deng, Can-Min
Format: Article
Language:English
Subjects:
Astronomical models
Astronomy
Astrophysics and Cosmology
Black holes
Deposition
Elementary Particles
Gravitational waves
Hadrons
Hawking radiation
Heavy Ions
Magnetic monopoles
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Phase transitions
Physics
Physics and Astronomy
Pulsars
Quantum Field Theories
Quantum Field Theory
Radiation
Regular Article - Theoretical Physics
String Theory
Universe
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Summary:Recently, the pulsar timing array (PTA) collaborations, including CPTA, EPTA, NANOGrav, and PPTA, announced that they detected a stochastic gravitational wave background spectrum in the nHz band. This may be relevant to the cosmological phase transition suggested by some models. Magnetic monopoles and primordial black holes (PBHs), two unsolved mysteries in the universe, may also have their production related to the cosmological phase transition. Inspired by that, we revisit the model proposed by Stojkovic and Freese, which involves PBHs accretion to solve the cosmological magnetic monopole problem. We further develop it by considering the increase in the mass of the PBHs during accretion and taking the effect of Hawking radiation into account. With these new considerations, we find that solutions to the problem still exist within a certain parameter space. In addition, we also generalize the analysis to PBHs with an extended distribution in mass. This may be a more interesting scenario because PBHs that have accreted magnetic monopoles might produce observable electromagnetic signals if they are massive enough to survive in the late universe.
ISSN:1434-6052
1434-6044
1434-6052
DOI:10.1140/epjc/s10052-024-12387-4