Abstract
The underlying event (UE) is an important part of high-energy collision events. In the event generators, the UE is tuned by fits to collision data. Usually, the UE observables are affected by the existence of extra jets and it is difficult to find a part of the phase space which is dominated by the UE. In this paper, we suggest to veto the jets in the considered region to disentangle these effects. The idea is verified to work on CMS Open Data. To our knowledge, it is the first time that such ideas are tested on real collision data.
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