Measurement of W+W⁻ production in association with one jet in proton--proton collisions at √s =8 TeV with the ATLAS detector

Mullier, Geoffrey; Haug, Sigve; Weber, Michael; Meloni, Federico; Cervelli, Alberto; Beck, Hans Peter; Stucci, Stefania; Ereditato, Antonio (2016). Measurement of W+W⁻ production in association with one jet in proton--proton collisions at √s =8 TeV with the ATLAS detector. Physics letters. B, 763, pp. 114-133. Elsevier 10.1016/j.physletb.2016.10.014

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The production of W boson pairs in association with one jet in pp collisions at √s=8 TeV is studied using data corresponding to an integrated luminosity of 20.3 fb⁻¹ collected by the ATLAS detector during 2012 at the CERN Large Hadron Collider. The cross section is measured in a fiducial phase-space region defined by the presence of exactly one electron and one muon, missing transverse momentum and exactly one jet with a transverse momentum above 25 GeV and a pseudorapidity of |η|<4.5. The leptons are required to have opposite electric charge and to pass transverse momentum and pseudorapidity requirements. The fiducial cross section is found to be σ fid,1-jet WW =136±6( stat)±14( syst)±3( lumi) fb. In combination with a previous measurement restricted to leptonic final states with no associated jets, the fiducial cross section of WW production with zero or one jet is measured to be σ fid,≤1-jet WW =511±9( stat)±26( syst)±10( lumi) fb. The ratio of fiducial cross sections in final states with one and zero jets is determined to be 0.36±0.05 . Finally, a total cross section extrapolated from the fiducial measurement of WW production with zero or one associated jet is reported. The measurements are compared to theoretical predictions and found in good agreement.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Haug, Sigve; Weber, Michael and Beck, Hans Peter

Subjects:

500 Science > 530 Physics
500 Science > 510 Mathematics

ISSN:

0370-2693

Publisher:

Elsevier

Language:

English

Submitter:

Annette Krebs-Wegenast

Date Deposited:

19 Jul 2017 08:52

Last Modified:

19 Jul 2017 08:52

Publisher DOI:

10.1016/j.physletb.2016.10.014

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt.

BORIS DOI:

10.7892/boris.99916

URI:

https://boris.unibe.ch/id/eprint/99916

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