| Title: |
Combined dark matter search towards dwarf spheroidal galaxies with Fermi -LAT, HAWC, H.E.S.S., MAGIC, and VERITAS |
| Authors: |
Abdollahi, S.; Baldini, L.; Bellazzini, R.; Berenji, B.; Bissaldi, E.; Bonino, R.; Bruel, P.; Buson, S.; Charles, E.; Chen, A. W.; Ciprini, S.; Crnogorcevic, M.; Cuoco, A.; D’Ammando, F.; de Angelis, A.; Di Mauro, M.; Di Lalla, N.; Di Venere, L.; Domínguez, A.; Fegan, S. J.; Wong, S. L.; The Fermi-LAT collaboration; The HAWC collaboration; The H.E.S.S. collaboration; The MAGIC collaboration; The VERITAS collaboration |
| Contributors: |
Abdollahi, S.; Baldini, L.; Bellazzini, R.; Berenji, B.; Bissaldi, E.; Bonino, R.; Bruel, P.; Buson, S.; Charles, E.; Chen, A. W.; Ciprini, S.; Crnogorcevic, M.; Cuoco, A.; D’Ammando, F.; de Angelis, A.; Di Mauro, M.; Di Lalla, N.; Di Venere, L.; Domínguez, A.; Fegan, S. J.; Wong, S. L.; The Fermi-LAT collaboration; The HAWC collaboration; The H.E.S.S. collaboration; The MAGIC collaboration; The VERITAS collaboration |
| Publication Year: |
2026 |
| Collection: |
Georg-August-Universität Göttingen: GoeScholar |
| Description: |
Dwarf spheroidal galaxies (dSphs) are excellent targets for indirect dark matter (DM) searches using gamma-ray telescopes because they are thought to have high DM content and a low astrophysical background. The sensitivity of these searches is improved by combining the observations of dSphs made by different gamma-ray telescopes. We present the results of a combined search by the most sensitive currently operating gamma-ray telescopes, namely: the satellite-borne Fermi -LAT telescope; the ground-based imaging atmospheric Cherenkov telescope arrays H.E.S.S., MAGIC, and VERITAS; and the HAWC water Cherenkov detector. Individual datasets were analyzed using a common statistical approach. Results were subsequently combined via a global joint likelihood analysis. We obtain constraints on the velocity-weighted cross section 〈 σv 〉 for DM self-annihilation as a function of the DM particle mass. This five-instrument combination allows the derivation of up to 2-3 times more constraining upper limits on 〈 σv 〉 than the individual results over a wide mass range spanning from 5 GeV to 100 TeV. Depending on the DM content modeling, the 95% confidence level observed limits reach 1.5×10 -24 cm 3 s -1 and 3.2×10 -25 cm 3 s -1 , respectively, in the τ + τ - annihilation channel for a DM mass of 2 TeV. |
| Document Type: |
article in journal/newspaper |
| Language: |
unknown |
| DOI: |
10.1088/1475-7516/2026/03/035 |
| Availability: |
https://resolver.sub.uni-goettingen.de/purl?gro-2/164384; https://doi.org/10.1088/1475-7516/2026/03/035 |
| Rights: |
info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.9902443A |
| Database: |
BASE |