6533b837fe1ef96bd12a1f9f
RESEARCH PRODUCT
Gravitational wave probes of axionlike particles
Ben A. StefanekCamila S. MachadoPedro SchwallerWolfram Ratzingersubject
PhysicsParticle physicsCosmology and Nongalactic Astrophysics (astro-ph.CO)010308 nuclear & particles physicsGravitational wavemedia_common.quotation_subjectFOS: Physical sciencesObservableParameter space01 natural sciencesDark photonUniverseStandard ModelHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Pulsar0103 physical sciences010306 general physicsAxionAstrophysics - Cosmology and Nongalactic Astrophysicsmedia_commondescription
We have recently shown that axions and axion-like particles (ALPs) may emit an observable stochastic gravitational wave (GW) background when they begin to oscillate in the early universe. In this note, we identify the regions of ALP parameter space which may be probed by future GW detectors, including ground- and space-based interferometers and pulsar timing arrays. Interestingly, these experiments have the ability to probe axions from the bottom up, i.e. in the very weakly coupled regime which is otherwise unconstrained. Furthermore, we discuss the effects of finite dark photon mass and kinetic mixing on the mechanism, as well as the (in)sensitivity to couplings of the axion to Standard Model fields. We conclude that realistic axion and ALP scenarios may indeed be probed by GW experiments in the future, and provide signal templates for further studies.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-10-27 | Physical Review |