Gravitationalwave detectors as particlephysics laboratories: Constraining scalar interactions with bosonstar binaries
Abstract
Gravitationalwave (GW) detections of binary neutron star coalescences play a crucial role to constrain the microscopic interaction of matter at ultrahigh density. Similarly, if boson stars exist in the universe their coalescence can be used to constrain the fundamental coupling constants of a scalar field theory. We develop the first coherent waveform model for the inspiral of boson stars with quartic interactions. The waveform includes coherently spininduced quadrupolar and tidaldeformability contributions in terms of the masses and spins of the binary and of a single coupling constant of the theory. We show that future instruments such as the Einstein Telescope and LISA can provide strong, complementary bounds on bosonic selfinteractions, while the constraining power of current detectors is marginal.
 Publication:

arXiv eprints
 Pub Date:
 July 2020
 arXiv:
 arXiv:2007.05264
 Bibcode:
 2020arXiv200705264P
 Keywords:

 General Relativity and Quantum Cosmology;
 Astrophysics  High Energy Astrophysical Phenomena;
 High Energy Physics  Phenomenology
 EPrint:
 12 pages, 8 figures