TY - JOUR
T1 - Anticipating a new physics signal in upcoming 21-cm power spectrum observations
AU - Barkana, Rennan
AU - Fialkov, Anastasia
AU - Liu, Hongwan
AU - Outmezguine, Nadav Joseph
N1 - Publisher Copyright: © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
PY - 2023/9/15
Y1 - 2023/9/15
N2 - Dark matter-baryon interactions can cool the baryonic fluid, which has been shown to modify the cosmological 21-cm global signal. We show that in a two-component dark sector with an interacting millicharged component, dark matter-baryon scattering can produce a 21-cm power spectrum signal with acoustic oscillations. The signal can be up to 3 orders of magnitude larger than expected in ΛCDM cosmology, given realistic astrophysical models. This model provides a new-physics target for near-future experiments such as HERA or NenuFAR, which can potentially discover or strongly constrain the dark matter explanation of the putative EDGES anomaly.
AB - Dark matter-baryon interactions can cool the baryonic fluid, which has been shown to modify the cosmological 21-cm global signal. We show that in a two-component dark sector with an interacting millicharged component, dark matter-baryon scattering can produce a 21-cm power spectrum signal with acoustic oscillations. The signal can be up to 3 orders of magnitude larger than expected in ΛCDM cosmology, given realistic astrophysical models. This model provides a new-physics target for near-future experiments such as HERA or NenuFAR, which can potentially discover or strongly constrain the dark matter explanation of the putative EDGES anomaly.
UR - http://www.scopus.com/inward/record.url?scp=85172777325&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.108.063503
DO - 10.1103/PhysRevD.108.063503
M3 - مقالة
SN - 2470-0010
VL - 108
JO - Physical Review D
JF - Physical Review D
IS - 6
M1 - 063503
ER -