The official press release explains it much better.
With better data from XENONnT, the XENON collaboration is confident it will soon find out whether this excess is a mere statistical fluke, a background contaminant, or something far more exciting: a new particle or interaction that goes beyond known physics.
I guess we will find out sooner or later which of the 3 explains it.
Only a few tritium atoms for every 1 X 10^25 (10,000,000,000,000,000,000,000,000!) xenon atoms would be needed to explain the excess.
Although the tritium seems like the most boring, the large finite numbers and the ability to detect or calculate this always amaze me...talk about finding a needle in a haystack.
In fact, it is more about finding a needle in a needle stack! :)
I may eventually write about this news next week. I have read to many incorrect articles about it (even on Hive).