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47 Tuc was the first globular cluster observed to be $\gamma$-ray bright,with the $\gamma$-rays being attributed to a population of unresolvedmillisecond pulsars (MSPs). Recent kinematic data, combined with detailedsimulations, appears to be consistent with the presence of an intermediate massblack hole (IMBH) at the centre of 47 Tuc. Building upon this, we analyse 9years of \textit{Fermi}-LAT observations to study the spectral properties of 47Tuc with unprecedented accuracy and sensitivity. This 9-year $\gamma$-rayspectrum shows that 47 Tuc's $\gamma$-ray flux cannot be explained by MSPsalone, due to a systematic discrepancy between the predicted and observed flux.Rather, we find a significant preference (TS $=40$) for describing 47 Tuc'sspectrum with a two source population model, consisting of an ensemble of MSPsand annihilating dark matter (DM) with an enhanced density around the IMBH,when compared to an MSP-only explanation. The best-fit DM mass of 34 GeV isessentially the same as the best-fit DM explanation for the Galactic centre"excess" when assuming DM annihilation into $b\bar{b}$ quarks. Our workconstitutes the first possible evidence of dark matter within a globularcluster.

Understanding the $\gamma$-ray emission from the globular cluster 47 Tuc: evidence for dark matter?