Hunting for heavy winos in the Galactic Center
Name
PhysRevD.98.123014.pdf
Size
1.22 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Rinchiuso, Lucia
Moult, Ian
Moulin, Emmanuel
Baumgart, Matthew
Cohen, Timothy
Vaidya, Varun
Rodd, Nicholas Llewellyn
Slatyer, Tracy Robyn
Stewart, Iain W
Date Issued
December 2018
Journal
Physical Review D
Publisher
American Physical Society
Citation
Rinchiuso, Lucia et al. "Hunting for heavy winos in the Galactic Center." Physical Review D 98, 12 (December 2018): 123014 © 2018 American Physical Society
Version
Final published version
Abstract
Observing gamma rays using ground-based atmospheric Cherenkov telescopes provides one of the only probes of heavy weakly interacting dark matter. A canonical target is the thermal wino, for which the strongest limits come from searches for photon lines from annihilations in the Galactic Center. Irreducible finite energy resolution effects motivate refining the prediction for a wino signal beyond the photon line approximation; recently, modern effective field theory techniques have been utilized to obtain a precise calculation of the full photon energy spectrum from wino annihilation. In this paper, we investigate the implications for a realistic mock H.E.S.S.-like line search. We emphasize the impact of including the non-trivial spectral shape, and we carefully treat the region of interest, presenting results for choices between 1° and 4° from the Galactic Center. Projected limits for wino masses from 1–70 TeV are interpreted as a constraint on the wino annihilation rate, or alternatively as the minimum core size required such that the wino is not excluded. If there is a thermal wino, H.E.S.S. will be able to probe cores of several kpc, which would begin to cause tension between this dark matter candidate and astrophysical observations/simulations.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.98.123014
