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10-1007-JHEP11-2016-110 Correct version.pdf (1.15 MB)

Study of hard double-parton scattering in four-jet events in pp collisions at v s = 7 TeV with the ATLAS experiment

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posted on 2023-06-09, 04:27 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, K Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, The ATLAS Collaboration
Inclusive four-jet events produced in proton-proton collisions at a centre-of-mass energy of v 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 ?=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 +0.005 -0.011 (stat.) +0.033 -0.037 (syst.) . After combining this measurement with those of the inclusive dijet and four-jet cross-sections in the appropriate phase space regions, the effective overlap area between the interacting protons, s eff , was determined to be s eff =14.9 +1.2 -1.0 (stat.) +5.1 -3.8 (syst.) mb. This result is consistent within the quoted uncertainties with previous measurements of s eff, performed at centre-of-mass energies between 63 GeV and 8 TeV using various final states, and it corresponds to 21 +7 -6 % of the total inelastic cross-section measured at v s = 7 TeV. The distributions of the observables sensitive to the contribution of hard double-parton scattering, corrected for detector effects, are also provided.

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Journal of High Energy Physics

ISSN

1029-8479

Publisher

Springer Verlag

Issue

11

Volume

2016

Page range

110

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Experimental Particle Physics Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-12-19

First Open Access (FOA) Date

2016-12-19

First Compliant Deposit (FCD) Date

2016-12-19

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