Measurement of hard double-parton interactions in W->lv+ 2 jet events at sqrt(s)=7 TeV with the ATLAS detector
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G. Aad
- Function : Author
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Y. Coadou
- Function : Author
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D. Calvet
- Function : Author
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- IdHAL : david-calvet
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- IdRef : 175107963
Reina Coromoto Camacho Toro
- Function : Author
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- IdHAL : reina-camacho-toro
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- IdRef : 168138077
Daniela Paredes Hernández
- Function : Author
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Timothée Theveneaux-Pelzer
- Function : Author
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S. Crépé-Renaudin
- Function : Author
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- IdHAL : sabine-crepe
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M.H. Genest
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- IdHAL : marie-helene-genest
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- IdRef : 191694142
F. Malek
- Function : Author
- PersonId : 21915
- IdHAL : fairouz-malek
- ORCID : 0000-0002-0948-5775
- IdRef : 084171219
N. Berger
- Function : Author
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C. Goy
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- IdHAL : goycorinne
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T. Hryn'Ova
- Function : Author
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- IdHAL : thrynova
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S. Jézéquel
- Function : Author
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- IdHAL : stephane-jezequel
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E. Augé
- Function : Author
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- IdHAL : etienne-auge
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J.B. de Vivie de Regie
- Function : Author
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- IdHAL : jean-baptiste-de-vivie
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S. Henrot-Versillé
- Function : Author
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- IdHAL : sophie-henrot-versille
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D. Rousseau
- Function : Author
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- IdHAL : david-rousseau
- ORCID : 0000-0001-7613-8063
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Abstract
The production of W bosons in association with two jets in proton-proton collisions at a centre-of-mass energy of sqrt(s)=7 TeV has been analysed for the presence of double-parton interactions using data corresponding to an integrated luminosity of 36/pb, collected with the ATLAS detector at the LHC. The fraction of events arising from double-parton interactions, fDP(D) has been measured through the momentum balance between the two jets and amounts to fDP(D) = 0.08 +- 0.01 (stat.) +- 0.02 (sys) for jets with transverse momentum PT > 20 GeV and rapidity |y|<2.8. This corresponds to a measurement of the effective area parameter for hard double-parton interactions of \sigma_eff = 15 +- 3 (stat.) +5 -3 (sys.) mb.