MHz Gravitational Wave Constraints with Decameter Michelson Interferometers

Kavli Affiliate: Lee McCuller

| First 5 Authors: Aaron S. Chou, Richard Gustafson, Craig Hogan, Brittany Kamai, Ohkyung Kwon

| Summary:

A new detector, the Fermilab Holometer, consists of separate yet identical
39-meter Michelson interferometers. Strain sensitivity achieved is better than
$10^{-21} /{sqrt{rm{Hz}}}$ between 1 to 13 MHz from a 130-hr dataset. This
measurement exceeds the sensitivity and frequency range made from previous high
frequency gravitational wave experiments by many orders of magnitude.
Constraints are placed on a stochastic background at 382 Hz resolution. The
3$sigma$ upper limit on $Omega_{rm{GW}}$, the gravitational wave energy
density normalized to the closure density, ranges from $5.6 times 10^{12}$ at
1 MHz to $8.4 times 10^{15}$ at 13 MHz. Another result from the same dataset
is a search for nearby primordial black hole binaries (PBHB). There are no
detectable monochromatic PBHBs in the mass range $0.83$ – $3.5 times 10^{21}$g
between the earth and the moon. Projections for a chirp search with the same
dataset increases the mass range to $0.59 – 2.5 times 10^{25}$g and distances
out to Jupiter. This result presents a new method for placing limits on a
poorly constrained mass range of primordial black holes. Additionally, solar
system searches for PBHBs place limits on their contribution to the total dark
matter fraction.

| Search Query: ArXiv Query: search_query=au:”Lee McCuller”&id_list=&start=0&max_results=10

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