https://doi.org/10.1051/epjconf/202431501013
Collider tests of nanohertz gravitational waves
Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
* e-mail: lisp@het.phys.sci.osaka-u.ac.jp
Published online: 18 December 2024
Recently, compelling evidence of nanohertz gravitational waves is indicated by the pulsar timing array collaborations. We present an MeV-scale first-order phase transition from a minimal dark sector to explain the gravitational waves, with a focus on the collider tests via the Higgs portal interaction. We demonstrate that to explain the observed gravitational waves, the Higgs portal coupling should be so sizable that it can be probed through Higgs invisible decay at the LHC and future colliders such as HL-LHC, CEPC, ILC, and FCC-ee. It opens up a promising avenue to uncover the physical origin of the nanohertz gravitational waves via colliders and to hear and see the minimal dark sector.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
