Kavli Affiliate: Li Xin Li
| First 5 Authors: Zhen Cao, F. Aharonian, Q. An, Axikegu, Y. X. Bai
| Summary:
In this work we try to search for signals generated by ultra-heavy dark
matter at the Large High Altitude Air Shower Observatory (LHAASO) data. We look
for possible gamma-ray by dark matter annihilation or decay from 16 dwarf
spheroidal galaxies in the field of view of LHAASO. Dwarf spheroidal galaxies
are among the most promising targets for indirect detection of dark matter
which have low fluxes of astrophysical $gamma$-ray background while large
amount of dark matter. By analyzing more than 700 days observational data at
LHAASO, no significant dark matter signal from 1 TeV to 1 EeV is detected.
Accordingly we derive the most stringent constraints on the ultra-heavy dark
matter annihilation cross-section up to EeV. The constraints on the lifetime of
dark matter in decay mode are also derived.
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