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- W4281385120 abstract "In this Letter we begin the study of visible dark sector signals coming from binary neutron star mergers. We focus on dark photons emitted in the 10 ms--1 s after the merger, and show how they can lead to bright transient $ensuremath{gamma}$-ray signals. The signal will be approximately isotropic, and for much of the interesting parameter space will be close to thermal, with an apparent temperature of $ensuremath{sim}100text{ }text{ }mathrm{keV}$. These features can distinguish the dark photon signal from the expected short $ensuremath{gamma}$-ray bursts produced in neutron star mergers, which are beamed in a small angle and nonthermal. We calculate the expected signal strength and show that for dark photon masses in the 1--100 MeV range it can easily lead to total luminosities larger than ${10}^{46}text{ }text{ }mathrm{ergs}$ for much of the unconstrained parameter space. This signal can be used to probe a large fraction of the unconstrained parameter space motivated by freeze-in dark matter scenarios with interactions mediated by a dark photon in that mass range. We also comment on future improvements when proposed telescopes and midband gravitational detectors become operational." @default.
- W4281385120 created "2022-05-25" @default.
- W4281385120 creator A5041508450 @default.
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- W4281385120 date "2022-05-24" @default.
- W4281385120 modified "2023-10-14" @default.
- W4281385120 title "<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi>γ</mml:mi></mml:mrow></mml:math> -Ray Flashes from Dark Photons in Neutron Star Mergers" @default.
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- W4281385120 doi "https://doi.org/10.1103/physrevlett.128.211101" @default.
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