Measurement of the underlying event activity in pp collisions at √s = 0.9 and 7 TeV with the novel jet-area/median approach

Measurement of the underlying event activity in pp collisions at √s = 0.9 and 7 TeV with the novel jet-area/median approach

The first measurement of the charged component of the underlying event using the novel "jet-area/median" approach is presented for proton-proton collisions at centre-of-mass energies of 0.9 and 7 TeV. The data were recorded in 2010 with the CMS experiment at the LHC. A new observable, sens...

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Bibliographic Details
Main Authors: CMS Collaboration, Bauer, Gerry P, Bendavid, Joshua L., Busza, Wit, Butz, Erik M., Cali, Ivan Amos, Dutta, Valentina, Gomez-Ceballos, Guillelmo, Goncharov, Maxim, Hahn, Kristian Allan, Klute, Markus, Lee, Yen-Jie, Luckey Jr, P David, Ma, Teng, Nahn, Steven, Paus, Christoph M. E., Ralph, Duncan Kelley, Roland, Christof E, Roland, Gunther M, Rudolph, Matthew Scott, Stephans, George S. F., Stoeckli, Fabian, Sumorok, Konstanty C, Sung, Kevin Kai Hong, Velicanu, Dragos Alexandru, Wenger, Edward Allen, Wolf, Roger, Wyslouch, Boleslaw, Xie, Si, Yang, Ming, Yilmaz, Yetkin, Yoon, A. S., Zanetti, Marco, Chan, M., Kim, Y., Li, W.
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Published: Springer Berlin Heidelberg 2018
Online Access:http://hdl.handle.net/1721.1/116063
https://orcid.org/0000-0002-3831-9071
https://orcid.org/0000-0002-0869-5631
https://orcid.org/0000-0003-2593-7767
https://orcid.org/0000-0002-6047-4211
https://orcid.org/0000-0001-8983-2169
https://orcid.org/0000-0003-3106-4894
https://orcid.org/0000-0002-1260-777X
https://orcid.org/0000-0003-3681-0649
https://orcid.org/0000-0002-2850-9007
Description
Summary:The first measurement of the charged component of the underlying event using the novel "jet-area/median" approach is presented for proton-proton collisions at centre-of-mass energies of 0.9 and 7 TeV. The data were recorded in 2010 with the CMS experiment at the LHC. A new observable, sensitive to soft particle production, is introduced and investigated inclusively and as a function of the event scale defined by the transverse momentum of the leading jet. Various phenomenological models are compared to data, with and without corrections for detector effects. None of the examined models describe the data satisfactorily. Keywords: Hadron-Hadron Scattering

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