Improved limits on short-wavelength gravitational waves from the cosmic microwave background

• Main Authors: Sendra, Irene, Smith, Tristan L.
• Format: Text
• Language: unknown
• Published: arXiv 2012
• Subjects: Cosmology and Nongalactic Astrophysics astro-ph.CO; High Energy Physics - Phenomenology hep-ph; High Energy Physics - Theory hep-th; FOS Physical sciences; Hubble; South Pole; Wilkinson; South pole
• Online Access: https://dx.doi.org/10.48550/arxiv.1203.4232; https://arxiv.org/abs/1203.4232

The cosmic microwave background (CMB) is affected by the total radiation density around the time of decoupling. At that epoch, neutrinos comprised a significant fraction of the radiative energy, but there could also be a contribution from primordial gravitational waves with frequencies greater than...