Search for subsolar primordial black holes in low mass-ratio binaries with LIGO-Virgo O2 data and implications for the primordial black hole dark matter fraction
Anonymous; G. Baltus; Sarah Caudill; Sébastien Clesse; Antoine Depasse; M. Fays; Heather Fong; S. J. Kapadia · 2026 · Physical review. D/Physical review. D.
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Abstract
We perform a search for binary black hole mergers with one sub-solar mass (SSM) black hole and a primary component above $\sim 2 M_\odot$ in data from the second observing run (O2) of the LIGO-Virgo detectors. Our analysis extends the parameter space explored by previous LIGO-Virgo Collaboration searches for binaries containing SSM components into a region of parameter space motivated by broad mass distributions of primordial black holes (PBHs) exhibiting a peak around $[2-3] M^{}_\odot$, which can arise from the reduction of the equation of state during the QCD phase transition in the early U
Abstract by Anonymous; G. Baltus; Sarah Caudill; Sébastien Clesse; Antoine Depasse; M. Fays; Heather Fong; S. J. Kapadia, Physical review. D/Physical review. D. (2026) — licensed CC BY 4.0.
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Metadata source: OpenAlex · DOI 10.1103/cpjc-qvwl