TY  - JOUR
AU  - Acharyya, A.
AU  - Archer, A.
AU  - Bangale, P.
AU  - Bartkoske, J. T.
AU  - Batista, P.
AU  - Baumgart, M.
AU  - Benbow, W.
AU  - Buckley, J. H.
AU  - Falcone, A.
AU  - Feng, Q.
AU  - Finley, J. P.
AU  - Foote, G. M.
AU  - Fortson, L.
AU  - Furniss, A.
AU  - Gallagher, G.
AU  - Hanlon, W. F.
AU  - Hervet, O.
AU  - Hoang, J.
AU  - Holder, J.
AU  - Humensky, T. B.
AU  - Jin, W.
AU  - Kaaret, P.
AU  - Kertzman, M.
AU  - Kherlakian, M.
AU  - Kieda, D.
AU  - Kleiner, Tobias Kai
AU  - Korzoun, N.
AU  - Krennrich, F.
AU  - Lang, M. J.
AU  - Lundy, M.
AU  - Maier, G.
AU  - McGrath, C. E.
AU  - Moriarty, P.
AU  - O'Brien, S.
AU  - Ong, R. A.
AU  - Pfrang, Konstantin Johannes
AU  - Pohl, M.
AU  - Pueschel, E.
AU  - Quinn, J.
AU  - Ragan, K.
AU  - Reynolds, P. T.
AU  - Roache, E.
AU  - Rodd, N. L.
AU  - Ryan, J. L.
AU  - Sadeh, I.
AU  - Saha, L.
AU  - Santander, M.
AU  - Sembroski, G. H.
AU  - Shang, R.
AU  - Splettstoesser, M.
AU  - Tak, Donggeun
AU  - Tucci, J. V.
AU  - Vassiliev, V. V.
AU  - Williams, D. A.
TI  - Search for Ultraheavy Dark Matter from Observations of Dwarf Spheroidal Galaxies with VERITAS
JO  - The astrophysical journal / 1
VL  - 945
IS  - 2
SN  - 0004-637X
CY  - London
PB  - Institute of Physics Publ.
M1  - PUBDB-2022-07671
M1  - arXiv:2302.08784
SP  - 101 
PY  - 2023
N1  - 10 pages, 7 figures
AB  - 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 <sub>χ</sub> ≲ 100 TeV), a mass range accessible with current Imaging Atmospheric Cherenkov Telescopes. As ultraheavy dark matter (UHDM; M <sub>χ</sub> ≳ 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.
KW  - dark matter: annihilation (INSPIRE)
KW  - dark matter: mass (INSPIRE)
KW  - background: fluctuation (INSPIRE)
KW  - WIMP (INSPIRE)
KW  - galaxy (INSPIRE)
KW  - TeV (INSPIRE)
KW  - VERITAS (INSPIRE)
KW  - observatory (INSPIRE)
KW  - GeV (INSPIRE)
KW  - composite (INSPIRE)
KW  - Cherenkov counter (INSPIRE)
KW  - imaging (INSPIRE)
KW  - gamma ray: VHE (INSPIRE)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000950838900001
DO  - DOI:10.3847/1538-4357/acbc7b
UR  - https://bib-pubdb1.desy.de/record/490354
ER  -