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For nearly two decades the DAMA Collaboration has been observing a modulatingsignal compatible with that expected from a dark matter presence in our galaxy.However, interpretations of this with the standard assumptions for dark matterparticles are strongly ruled out by a large number of other experiments. Thistension can be relaxed somewhat by making more tailored choices for the darkmatter model and properties of interest, but expanding the models of interestin such a way makes it impossible to test the DAMA modulation conclusively. Inorder to understand the exact nature of this signal, we need to use a detectorbased on the same target (NaI(Tl)), which would be sensitive to exactly thesame particle interaction models as DAMA. There are a number of suchexperiments in the data taking or commissioning stages designed to do justthis, two of which (ANAIS and COSINE) recently released their results after 3years of data taking. Interestingly, the modulation observed by the twoexperiments deviate from each other by 2$\sigma$, while being within 3$\sigma$of the DAMA result. This paper addresses potential differences between NaI(Tl)based detectors that could lead to the differing results to date, with aparticular focus on the quenching factor.

Hidden dependencies in model independent tests of DAMA