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- Title
Magnetic monopole meets primordial black hole: an extended analysis.
- Authors
Zhang, Chen; Zhang, Xin
- Abstract
We investigate gravitational capture of magnetic monopoles by primordial black holes (PBH) that evaporate before Big Bang Nucleosynthesis (BBN), a hypothetical process which was once proposed as an alternative solution to the monopole problem. Magnetic monopoles produced in phase transitions of a grand or partially unified gauge theory are considered. We prove analytically that for all extended PBH mass functions that preserve radiation domination, it is impossible to reduce the monopole abundance via gravitational capture by PBHs to values significantly below the one set by monopole annihilation (or below its initial abundance if it is smaller), regardless of the nature of the capture process (diffusive or non-diffusive). Therefore, the monopole problem cannot be solved by PBH capture in a radiation-dominated era in the early universe.
- Subjects
MAGNETIC monopoles; BLACK holes; VALUE capture; PHASE transitions; NUCLEOSYNTHESIS; GAUGE field theory
- Publication
European Physical Journal C -- Particles & Fields, 2024, Vol 84, Issue 1, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-024-12383-8