The cross-section for the production of two jets in association with a leptonically decaying Z boson (Zjj) is measured in protonâproton collisions at a centre-of-mass energy of 13 TeV, using data recorded with the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of 3.2 fbâ1. The electroweak Zjj cross-section is extracted in a fiducial region chosen to enhance the electroweak contribution relative to the dominant DrellâYan Zjj process, which is constrained using a data-driven approach. The measured fiducial electroweak cross-section is ÏEWZjj= 119±16(stat.)±20(syst.)±2(lumi.) fb for dijet invariant mass greater than 250 GeV, and 34.2±5.8(stat.)±5.5(syst.)±0.7(lumi.) fb for dijet invariant mass greater than 1 TeV. Standard Model predictions are in agreement with the measurements. The inclusive Zjj cross-section is also measured in six different fiducial regions with varying contributions from electroweak and DrellâYan Zjj production.
Measurement of the cross-section for electroweak production of dijets in association with a Z boson in pp collisions at s=13 TeV with the ATLAS detector
Capua, M.;Crosetti, G.;Mastroberardino, A.Membro del Collaboration Group
;Meoni, E.;Schioppa, M.;Tassi, E.;
2017-01-01
Abstract
The cross-section for the production of two jets in association with a leptonically decaying Z boson (Zjj) is measured in protonâproton collisions at a centre-of-mass energy of 13 TeV, using data recorded with the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of 3.2 fbâ1. The electroweak Zjj cross-section is extracted in a fiducial region chosen to enhance the electroweak contribution relative to the dominant DrellâYan Zjj process, which is constrained using a data-driven approach. The measured fiducial electroweak cross-section is ÏEWZjj= 119±16(stat.)±20(syst.)±2(lumi.) fb for dijet invariant mass greater than 250 GeV, and 34.2±5.8(stat.)±5.5(syst.)±0.7(lumi.) fb for dijet invariant mass greater than 1 TeV. Standard Model predictions are in agreement with the measurements. The inclusive Zjj cross-section is also measured in six different fiducial regions with varying contributions from electroweak and DrellâYan Zjj production.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.