On the characterisation of the underlying event
By Matteo Cacciari, G. Salam, S. Sapeta. 2009
146 citations recorded by the source corpus.
The measurement of the underlying event (UE) and its separation from hard interactions in hadron-collider events is a conceptually and practically challenging task. We develop a simple, mostly analytical toy model for the UE in order to understand how different UE measurement approaches fare on the practical aspects of this problem, comparing the traditional approach used so far at Tevatron with a recently proposed “jet-area/median” approach. Both are found to perform comparably well in measuring average properties of the UE, such as the mean transverse momentum flow, but the jet-area/median approach has distinct advantages in determining its fluctuations. We then use the jet-area/median method to investigate a range of UE properties in existing Monte Carlo event-generator tunes, validating the main results of the toy-model and highlighting so-far unmeasured characteristics of the UE such as its rapidity dependence, as well as its intra- and interevent fluctuations and correlations.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/01b473c81211bc5c4c02a860f7298dfe25e26237
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In Nuclear and High Energy Physics
- A. Larkoski
- Cms Collaboration
- G. Salam
- Jesse Thaler
- G. Soyez
- Atlas Collaboration
- Michael Spannowsky
- S. Marzani
Citations in the corpus
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- Search for new phenomena in high-mass diphoton final states using 37 fb−1 of proton–proton collisions collected at s=13 TeV with the ATLAS detector (2017, unknown): “4 around the photon candidate, excluding the photon energy deposits and correcting for pile-up and underlying-event contributions [40–42], is required to be below 0 .”