Weakly Interacting Massive Particles ({WIMPs}) in the {GeV}\u2013{TeV} mass range could produce gamma rays through self-annihilation or decay, offering potential observational signatures for indirect dark matter ({DM}) searches. Dwarf spheroidal galaxies ({dSphs}) of the Milky Way are prime targets for such studies due to their high inferred {DM}-induced gamma-ray fluxes and minimal astrophysical background. In this contribution, we present the final results of the first constraints on {DM} annihilation in {dSphs} obtained by combining data from five leading gamma-ray observatories: the space-based Fermi-{LAT} (100 {MeV}\u2013100 {GeV}), the ground-based H.E.S.S., {MAGIC}, and {VERITAS} (100 {GeV}\u201310 {TeV}), and the water Cherenkov detector {HAWC} (>10 {TeV}). Each experiment analyzed its respective dataset using a coordinated statistical approach, ensuring a consistent treatment of systematics and background estimation. The individual results were then combined in a joint likelihood analysis, significantly improving sensitivity to potential {DM} signals. By integrating these independent datasets, we derive stringent upper limits on the velocity-weighted annihilation cross-section $\\langle \\sigma v \\rangle$ over a broad {DM} mass range of 5 {GeV} to 100 {TeV}. The obtained constraints improve with respect to the individual searches by a factor of 2\u20133, depending on the {DM} mass and annihilation channel. For instance, the observed 95\\% confidence level upper limits for a 2 {TeV} dark matter particle annihilating into $\\tau^+ \\tau^-$ pairs range between $1.5\\times 10^{-24} cm^3 s^{-1}$ cm $^3$ s $^{-1}$ and $3.2 \\times 10^{-25}$ cm $^3$ s $^{-1}$ depending on the assumed dark matter distributions. These results set some of the most stringent constraints on {DM} annihilation in {dSphs} to date, showcasing the power of multi-instrument synergy. Our findings underscore the critical role of cross-collaboration among gamma-ray observatories and establish a methodological framework for future analyses, including those incorporating next-generation gamma-ray and neutrino telescopes.<\/p>\n","protected":false},"excerpt":{"rendered":"
Weakly Interacting Massive Particles ({WIMPs}) in the {GeV}\u2013{TeV} mass range could produce gamma rays through self-annihilation or decay, offering potential observational signatures for indirect dark matter ({DM}) searches. Dwarf spheroidal galaxies ({dSphs}) of the Milky Way are prime targets for such studies due to their high inferred {DM}-induced gamma-ray fluxes and minimal astrophysical background. In this contribution, we present the final results of the first constraints on {DM} annihilation in […]<\/p>\n","protected":false},"author":14,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"publication-type":[32],"class_list":["post-32233","publication","type-publication","status-publish","hentry","publication-type-inproceedings"],"acf":[],"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication\/32233","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication"}],"about":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/types\/publication"}],"author":[{"embeddable":true,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/users\/14"}],"version-history":[{"count":0,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication\/32233\/revisions"}],"wp:attachment":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/media?parent=32233"}],"wp:term":[{"taxonomy":"publication-type","embeddable":true,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication-type?post=32233"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}