Details
| Original language | English |
|---|---|
| Article number | 012034 |
| Number of pages | 5 |
| Journal | Physical Review Research |
| Volume | 2 |
| Issue number | 1 |
| Early online date | 7 Feb 2020 |
| Publication status | Published - Feb 2020 |
Abstract
We assume that the cosmological dark matter is composed of massive neutral scalar particles that decay into two massless particles. The decay produces a stochastic background of gravitational waves (GWs) via a "memory effect"mechanism. We calculate the spectral amplitude and slope of the resulting background, which is frequency independent (flat). We discuss its potential observability and show that the resulting background might dominate the cosmological GW background at frequencies above ≈1010 Hz. Penrose has proposed a cosmological model in which dark matter particles have the Planck mass and decay into two gravitons. For these, the spectrum has an additional "direct"contribution from the decay products, which we also calculate. At low frequencies, this direct contribution also has a flat spectrum but with a much smaller amplitude than the memory part.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical Review Research, Vol. 2, No. 1, 012034, 02.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Gravitational wave stochastic background from cosmological particle decay
AU - Allen, Bruce
PY - 2020/2
Y1 - 2020/2
N2 - We assume that the cosmological dark matter is composed of massive neutral scalar particles that decay into two massless particles. The decay produces a stochastic background of gravitational waves (GWs) via a "memory effect"mechanism. We calculate the spectral amplitude and slope of the resulting background, which is frequency independent (flat). We discuss its potential observability and show that the resulting background might dominate the cosmological GW background at frequencies above ≈1010 Hz. Penrose has proposed a cosmological model in which dark matter particles have the Planck mass and decay into two gravitons. For these, the spectrum has an additional "direct"contribution from the decay products, which we also calculate. At low frequencies, this direct contribution also has a flat spectrum but with a much smaller amplitude than the memory part.
AB - We assume that the cosmological dark matter is composed of massive neutral scalar particles that decay into two massless particles. The decay produces a stochastic background of gravitational waves (GWs) via a "memory effect"mechanism. We calculate the spectral amplitude and slope of the resulting background, which is frequency independent (flat). We discuss its potential observability and show that the resulting background might dominate the cosmological GW background at frequencies above ≈1010 Hz. Penrose has proposed a cosmological model in which dark matter particles have the Planck mass and decay into two gravitons. For these, the spectrum has an additional "direct"contribution from the decay products, which we also calculate. At low frequencies, this direct contribution also has a flat spectrum but with a much smaller amplitude than the memory part.
UR - http://www.scopus.com/inward/record.url?scp=85112392167&partnerID=8YFLogxK
U2 - 10.48550/arXiv.1910.08213
DO - 10.48550/arXiv.1910.08213
M3 - Article
AN - SCOPUS:85112392167
VL - 2
JO - Physical Review Research
JF - Physical Review Research
SN - 2643-1564
IS - 1
M1 - 012034
ER -