Search for Ultraheavy Dark Matter from Observations of Dwarf Spheroidal Galaxies with VERITAS

Acharyya, A.; Hoang, J.; Santander, M.; Quinn, J.; Baumgart, M.; Kieda, D.; Holder, J.; Kertzman, M.; Kaaret, P.; Vassiliev, V. V.; Lang, M. J.; Tak, Donggeun; Kherlakian, M.; Sembroski, G. H.; Kleiner, Tobias Kai; Finley, J. P.; Lundy, M.; Saha, L.; Ragan, K.; Jin, W.; Fortson, L.; Sadeh, I.; Hanlon, W. F.; Furniss, A.; Archer, A.; Humensky, T. B.; Reynolds, P. T.; Hervet, O.; Williams, D. A.; Shang, R.; Roache, E.; Falcone, A.; Benbow, W.; O'Brien, S.; Maier, G.; McGrath, C. E.; Batista, P.; Tucci, J. V.; Ryan, J. L.; Gallagher, G.; Feng, Q.; Pfrang, Konstantin Johannes; Moriarty, P.; Krennrich, F.; Splettstoesser, M.; Foote, G. M.; Rodd, N. L.; Buckley, J. H.; Bangale, P.; Bartkoske, J. T.; Pohl, M.; Ong, R. A.; Pueschel, E.; Korzoun, N.

doi:10.3847/1538-4357/acbc7b

Journal Article

PUBDB-2022-07671

Search for Ultraheavy Dark Matter from Observations of Dwarf Spheroidal Galaxies with VERITAS

Acharyya, A. ; Archer, A. ; Bangale, P. ; Bartkoske, J. T. ; Batista, P.DESY* ; Baumgart, M. ; Benbow, W. ; Buckley, J. H. ; Falcone, A. ; Feng, Q. ; Finley, J. P. ; Foote, G. M. ; Fortson, L. ; Furniss, A. ; Gallagher, G. ; Hanlon, W. F. ; Hervet, O. ; Hoang, J. ; Holder, J. ; Humensky, T. B. ; Jin, W. ; Kaaret, P. ; Kertzman, M. ; Kherlakian, M. ; Kieda, D. ; Kleiner, T. K.DESY* ; Korzoun, N. ; Krennrich, F. ; Lang, M. J. ; Lundy, M. ; Maier, G.DESY* ; McGrath, C. E. ; Moriarty, P. ; O'Brien, S. ; Ong, R. A. ; Pfrang, K. J.DESY* ; Pohl, M.DESY* ; Pueschel, E. (Corresponding author)DESY* ; Quinn, J. ; Ragan, K. ; Reynolds, P. T. ; Roache, E. ; Rodd, N. L. ; Ryan, J. L. ; Sadeh, I.DESY* ; Saha, L. ; Santander, M. ; Sembroski, G. H. ; Shang, R. ; Splettstoesser, M. ; Tak, D. (Corresponding author)DESY* ; Tucci, J. V. ; Vassiliev, V. V. ; Williams, D. A.

2023
Institute of Physics Publ. London

The astrophysical journal / 1 945(2), 101 (2023) [10.3847/1538-4357/acbc7b]

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Please use a persistent id in citations: doi:10.3847/1538-4357/acbc7b doi:10.3204/PUBDB-2022-07671

Report No.: arXiv:2302.08784

Abstract: Dark matter is a key piece of the current cosmological scenario, with weakly interacting massive particles (WIMPs) a leading dark matter candidate. WIMPs have not been detected in their conventional parameter space (100 GeV ≲M $_{χ}$ ≲ 100 TeV), a mass range accessible with current Imaging Atmospheric Cherenkov Telescopes. As ultraheavy dark matter (UHDM; M $_{χ}$ ≳ 100 TeV) has been suggested as an underexplored alternative to the WIMP paradigm, we search for an indirect dark matter annihilation signal in a higher mass range (up to 30 PeV) with the VERITAS γ-ray observatory. With 216 hr of observations of four dwarf spheroidal galaxies, we perform an unbinned likelihood analysis. We find no evidence of a γ-ray signal from UHDM annihilation above the background fluctuation for any individual dwarf galaxy nor for a joint-fit analysis, and consequently constrain the velocity-weighted annihilation cross section of UHDM for dark matter particle masses between 1 TeV and 30 PeV. We additionally set constraints on the allowed radius of a composite UHDM particle.

Keyword(s): dark matter: annihilation ; dark matter: mass ; background: fluctuation ; WIMP ; galaxy ; TeV ; VERITAS ; observatory ; GeV ; composite ; Cherenkov counter ; imaging ; gamma ray: VHE

Classification:

ddc:520

Note: 10 pages, 7 figures

Contributing Institute(s):

VERITAS (Z_VER)

Research Program(s):

613 - Matter and Radiation from the Universe (POF4-613) (POF4-613)

Experiment(s):

Very Energetic Radiation Imaging Telescope Array System

Appears in the scientific report 2023

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Medline

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