Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/115225
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Type: | Journal article |
Title: | Study of hard double-parton scattering in four-jet events in pp collisions at √s=7 TeV with the ATLAS experiment |
Other Titles: | Study of hard double-parton scattering in four-jet events in pp collisions at root s=7 TeV with the ATLAS experiment |
Author: | Aaboud, M. Aad, G. Abbott, B. Abdallah, J. Abdinov, O. Abeloos, B. Aben, R. AbouZeid, O. Abraham, N. Abramowicz, H. Abreu, H. Abreu, R. Abulaiti, Y. Acharya, B. Adachi, S. Adamczyk, L. Adams, D. Adelman, J. Adomeit, S. Adye, T. et al. |
Citation: | The Journal of High Energy Physics, 2016; 2016(11):110-0-110-51 |
Publisher: | Springer-Verlag |
Issue Date: | 2016 |
ISSN: | 1126-6708 1029-8479 |
Statement of Responsibility: | The ATLAS collaboration, M. Aaboud ... P. Jackson ... L. Lee ... A. Petridis ... M.J. White ... et al. |
Abstract: | Inclusive four-jet events produced in proton-proton collisions at a centre-of-mass energy of s√=7 TeV are analysed for the presence of hard double-parton scattering using data corresponding to an integrated luminosity of 37.3 pb⁻¹, collected with the ATLAS detector at the LHC. The contribution of hard double-parton scattering to the production of four-jet events is extracted using an artificial neural network, assuming that hard double-parton scattering can be approximated by an uncorrelated overlaying of dijet events. For events containing at least four jets with transverse momentum p T ≥ 20 GeV and pseudorapidity |η| ≤ 4.4, and at least one having p T ≥ 42.5 GeV, the contribution of hard double-parton scattering is estimated to be f DPS = 0.092 − 0.011 + 0.005 (stat.) − 0.037 + 0.033 (syst.). After combining this measurement with those of the inclusive dijet and four-jet cross-sections in the appropriate phase space regions, the effective cross-section, σ eff , was determined to be σ eff = 14. 9 − 1.0 + 1.2 (stat.) − 3.8 + 5.1 (syst.) mb. This result is consistent within the quoted uncertainties with previous measurements of σ eff , performed at centre-of-mass energies between 63 GeV and 8 TeV using various final states, and it corresponds to 21 − 6 + 7 % of the total inelastic cross-section measured at s√=7 TeV. The distributions of the observables sensitive to the contribution of hard double-parton scattering, corrected for detector effects, are also provided. |
Keywords: | Hadron-Hadron scattering (experiments) |
Description: | Published: November 21, 2016 |
Rights: | Copyright: © The Author(s) 2016. Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. |
DOI: | 10.1007/JHEP11(2016)110 |
Published version: | http://dx.doi.org/10.1007/jhep11(2016)110 |
Appears in Collections: | Aurora harvest 8 Physics publications |
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File | Description | Size | Format | |
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hdl_115225.pdf | Published version | 1.34 MB | Adobe PDF | View/Open |
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