Mullier, Geoffrey; Haug, Sigve; Weber, Michael; Meloni, Federico; Cervelli, Alberto; Beck, Hans Peter; Stucci, Stefania; Ereditato, Antonio (2016). Study of hard double-parton scattering in four-jet events in pp collisions at √s=7 TeV with the ATLAS experiment. Journal of High Energy Physics, 2016(11) Springer 10.1007/JHEP11(2016)110
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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 pT ≥ 20 GeV and pseudorapidity |η| ≤ 4.4, and at least one having pT ≥ 42.5 GeV, the contribution of hard double-parton scattering is estimated to be fDPS = 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, σeff , was determined to be σeff = 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 σeff , 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 =7TeV. The distributions of the observables sensitive to the contribution of hard double-parton scattering, corrected for detector effects, are also provided.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Haug, Sigve, Weber, Michele, Beck, Hans Peter |
Subjects: |
500 Science > 530 Physics 500 Science > 510 Mathematics |
ISSN: |
1029-8479 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
Annette Krebs-Wegenast |
Date Deposited: |
19 Jul 2017 09:11 |
Last Modified: |
05 Dec 2022 15:05 |
Publisher DOI: |
10.1007/JHEP11(2016)110 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt. |
BORIS DOI: |
10.7892/boris.99919 |
URI: |
https://boris.unibe.ch/id/eprint/99919 |
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