The observation of an absorption feature in the 21-cm spectrum at redshift z≈17 implies bounds on dark-matter (DM) annihilations for a broad range of masses, given that significant heating of the intergalactic medium would have erased such a feature. The resulting bounds on the DM annihilation cross sections are comparable to the strongest ones from all other observables.
Bounds on Dark-Matter Annihilations from 21-cm Data / D'Amico, Guido; Panci, Paolo; Strumia, Alessandro. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 121:1(2018), p. 011103. [10.1103/PhysRevLett.121.011103]
Bounds on Dark-Matter Annihilations from 21-cm Data
D'Amico, Guido;
2018-01-01
Abstract
The observation of an absorption feature in the 21-cm spectrum at redshift z≈17 implies bounds on dark-matter (DM) annihilations for a broad range of masses, given that significant heating of the intergalactic medium would have erased such a feature. The resulting bounds on the DM annihilation cross sections are comparable to the strongest ones from all other observables.File in questo prodotto:
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