| Article | |
| Report number | arXiv:2302.08784 |
| Title | Search for Ultraheavy Dark Matter from Observations of Dwarf Spheroidal Galaxies with VERITAS |
| Author(s) |
Acharyya, A. (Alabama U.) ; Archer, A. (DePauw U.) ; Bangale, P. (Delaware U., Bartol Inst.) ; Bartkoske, J.T. (Utah U.) ; Batista, P. (DESY, Zeuthen) ; Baumgart, M. (Arizona State U.) ; Benbow, W. (Harvard U.) ; Buckley, J.H. (Washington U., St. Louis) ; Falcone, A. (Penn State U., Astron. Astrophys.) ; Feng, Q. (Harvard U.) ; Finley, J.P. (Purdue U.) ; Foote, G.M. (Delaware U., Bartol Inst.) ; Fortson, L. (Minnesota U.) ; Furniss, A. (Cal State, East Bay) ; Gallagher, G. (Purdue U.) ; Hanlon, W.F. (Harvard U.) ; Hervet, O. (UC, Santa Cruz, Inst. Part. Phys.) ; Hoang, J. (UC, Santa Cruz, Inst. Part. Phys.) ; Holder, J. (Delaware U., Bartol Inst.) ; Humensky, T.B. (Maryland U.) ; Jin, W. (Alabama U.) ; Kaaret, P. (Iowa U.) ; Kertzman, M. (DePauw U.) ; Kherlakian, M. (DESY, Zeuthen) ; Kieda, D. (Utah U.) ; Kleiner, T.K. (DESY, Zeuthen) ; Korzoun, N. (Delaware U., Bartol Inst.) ; Krennrich, F. (Iowa State U.) ; Lang, M.J. (Natl. U. of Ireland, Galway) ; Lundy, M. (McGill U.) ; Maier, G. (DESY, Zeuthen) ; McGrath, C.E. (University Coll., Dublin) ; Moriarty, P. (Natl. U. of Ireland, Galway) ; O'Brien, S. (McGill U.) ; Ong, R.A. (UCLA) ; Pfrang, K. (DESY, Zeuthen) ; Pohl, M. (Potsdam U. ; DESY, Zeuthen) ; Pueschel, E. (DESY, Zeuthen) ; Quinn, J. (University Coll., Dublin) ; Ragan, K. (McGill U.) ; Reynolds, P.T. (University Coll., Cork) ; Roache, E. (Harvard U.) ; Rodd, N.L. (CERN) ; Ryan, J.L. (UCLA) ; Sadeh, I. (DESY, Zeuthen) ; Saha, L. (Harvard U.) ; Santander, M. (Alabama U.) ; Sembroski, G.H. (Purdue U.) ; Shang, R. (UCLA) ; Splettstoesser, M. (UC, Santa Cruz, Inst. Part. Phys.) ; Tak, D. (DESY, Zeuthen ; Seoul Natl. U., Dept. Phys. Astron.) ; Tucci, J.V. (Indiana U.-Purdue U., Indianapolis) ; Vassiliev, V.V. (UCLA) ; Williams, D.A. (UC, Santa Cruz, Inst. Part. Phys.) |
| Publication | 2023-03-13 |
| Imprint | 2023-02-17 |
| Number of pages | 10 |
| Note | 10 pages, 7 figures |
| In: | Astrophys. J. 945 (2023) 101 |
| DOI | 10.3847/1538-4357/acbc7b |
| Subject category | hep-ph ; Particle Physics - Phenomenology ; hep-ex ; Particle Physics - Experiment ; astro-ph.CO ; Astrophysics and Astronomy ; astro-ph.HE ; Astrophysics and Astronomy |
| Accelerator/Facility, Experiment | VERITAS |
| 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 $\lesssim M_{\chi} \lesssim$ 100 TeV), a mass range accessible with current Imaging Atmospheric Cherenkov Telescopes. As ultraheavy dark matter (UHDM; $M_{\chi} \gtrsim$ 100 TeV) has been suggested as an under-explored 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 gamma-ray observatory. With 216 hours of observations of four dwarf spheroidal galaxies, we perform an unbinned likelihood analysis. We find no evidence of a $\gamma$-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. |
| Copyright/License | publication: © 2023-2024 The Author(s) (License: CC-BY-4.0) preprint: (License: arXiv nonexclusive-distrib 1.0) |
Corresponding record in: Inspire
Δημιουργία εγγραφής 2023-02-21, τελευταία τροποποίηση 2024-02-19