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• W2463614664 abstract "In this letter we introduce a new variable $xi$, namely the number of tracks associated with the primary vertex, which are not parts of reconstructed objects such as jets/isolated leptons etc. We demonstrate its usefulness in the context of new physics searches in the channel monojet$+$missing transverse momentum (MET). In models such as in compressed supersymmetry, events are often characterized by a rather large number of soft partons from the cascade decays, none of which result in reconstructed objects. We find that $xi$, binned in $p_T$, can discriminate these new physics events from events due to $Z+text{jets}$, that is, the main background in the channel monojet+ MET. The information contained in soft tracks is largely uncorrelated with traditional variables such as the effective mass, MET, $p_T$ of the jet, etc. and, therefore, can be combined with these to increase the discovery potential by more than $200%$ (depending on the spectra, of course). In fact, we find that simple cuts on $xi(p_T)$ along with cuts on MET, and the effective mass outperforms sophisticated optimized MultiVariate Analyses using all conventional variables. One can model the background distribution of $xi(p_T)$ in an entirely data-driven way, and make these robust against pile-up by identifying the primary vertex." @default.
• W2463614664 created "2016-07-22" @default.
• W2463614664 creator A5048043105 @default.
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• W2463614664 date "2016-12-22" @default.
• W2463614664 modified "2023-10-16" @default.
• W2463614664 title "Chasing new physics in stacks of soft tracks" @default.
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• W2463614664 doi "https://doi.org/10.1103/physrevd.94.111703" @default.
• W2463614664 hasPublicationYear "2016" @default.
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