Measurement of four-jet production in proton-proton collisions at √s = 7 TeV

Measurement of four-jet production in proton-proton collisions at √s = 7 TeV

Measurements of the differential cross sections for the production of exactly four jets in proton-proton collisions are presented as a function of the transverse momentum p[subscript T] and pseudorapidity η, together with the correlations in azimuthal angle and the p[subscript T] balance among the j...

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Bibliographic Details
Main Authors: Apyan, Aram, Barbieri, Riccardo, Busza, Wit, Cali, Ivan Amos, Chan, M., Di Matteo, Leonardo, Gomez-Ceballos, Guillelmo, Goncharov, Maxim, Gulhan, Doga Can, Klute, Markus, Lai, Yue Shi, Ma, Teng, Paus, Christoph M. E., Ralph, Duncan Kelley, Stephans, George S. F., Velicanu, Dragos Alexandru, Veverka, Jan, Wyslouch, Boleslaw, Yoon, A. S., Zanetti, Marco, Dutta, Valentina, Lee, Yen-Jie, Luckey Jr, P David, Roland, Christof E, Sumorok, Konstanty C, Yang, Mingming, Bauer, Gerry P, Levin, Andrew Michael, Roland, Gunther M, Stoeckli, Fabian, Wyslouch, Victoria
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Language:en_US
Published: American Physical Society 2014
Online Access:http://hdl.handle.net/1721.1/90885
https://orcid.org/0000-0002-3831-9071
https://orcid.org/0000-0003-3106-4894
https://orcid.org/0000-0001-6332-5839
https://orcid.org/0000-0001-8983-2169
https://orcid.org/0000-0002-1260-777X
https://orcid.org/0000-0002-9418-6656
https://orcid.org/0000-0002-6047-4211
https://orcid.org/0000-0002-6166-448X
https://orcid.org/0000-0003-3681-0649
https://orcid.org/0000-0003-1486-606X
https://orcid.org/0000-0003-2593-7767
https://orcid.org/0000-0001-9236-6621
https://orcid.org/0000-0002-0869-5631
https://orcid.org/0000-0002-1136-6900
Description
Summary:Measurements of the differential cross sections for the production of exactly four jets in proton-proton collisions are presented as a function of the transverse momentum p[subscript T] and pseudorapidity η, together with the correlations in azimuthal angle and the p[subscript T] balance among the jets. The data sample was collected in 2010 at a center-of-mass energy of 7 TeV with the CMS detector at the LHC, with an integrated luminosity of 36  pb[superscript −1]. The cross section for exactly four jets, with two hard jets of p[subscript T] > 50  GeV each, together with two jets of p[subscript T] > 20  GeV each, within |η| < 4.7 is measured to be σ = 330 ± 5(stat.) ± 45(syst.)  nb. It is found that fixed-order matrix element calculations including parton showers describe the measured differential cross sections in some regions of phase space only, and that adding contributions from double parton scattering brings the Monte Carlo predictions closer to the data.

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