• DOI:10.1103/PhysRevLett.128.051301
• Corpus ID: 236428543

Search for a Scalar Induced Stochastic Gravitational Wave Background in the Third LIGO-Virgo Observing Run.

@article{RomeroRodrguez2021SearchFA,
  title={Search for a Scalar Induced Stochastic Gravitational Wave Background in the Third LIGO-Virgo Observing Run.},
  author={Alba Romero-Rodr{\'i}guez and Miguel {\'A}ngel Mart{\'i}nez and Oriol Pujol{\`a}s and Mairi Sakellariadou and Ville Vaskonen},
  journal={Physical review letters},
  year={2021},
  volume={128 5},
  pages={
          051301
        }
}

• A. Romero-Rodríguez, Miguel Ángel Martínez, +2 authors V. Vaskonen
• Published 24 July 2021
• Physics
• Physical review letters

The formation of primordial black holes from inflationary fluctuations is accompanied by a scalar induced gravitational wave background. We perform a Bayesian search of such background in the data from Advanced LIGO and Virgo's first, second, and third observing runs, parametrizing the peak in the curvature power spectrum by a log-normal distribution. The search shows no evidence for such a background. We place 95% confidence level upper limits on the integrated power of the curvature power spectrum peak which, for a narrow width, reaches down to 0.02 at 10^{17}  Mpc^{-1}. The resulting constraints are stronger than those arising from big bang nucleosynthesis or cosmic microwave background observations. In addition, we find that the constraints from LIGO and Virgo, at their design sensitivity, and from the Einstein Telescope can compete with those related to the abundance of the formed primordial black holes.