Measurements of four-lepton (4, =e,��) production cross sections at the Z resonance in pp collisions at the LHC with the ATLAS detector are presented. For dilepton and four-lepton invariant mass regions m+->5GeV and 80<m4<100GeV, the measured cross sections are 76��18(stat) ��4(syst)��1.4(lumi)fb and 107��9(stat)��4(syst) ��3.0(lumi)fb at s=7 and 8 TeV, respectively. By subtracting the nonresonant 4 production contributions and normalizing with Z�����+��- events, the branching fraction for the Z boson decay to 4 is determined to be (3.20��0.25(stat)��0.13(syst))��10-6, consistent with the standard model prediction. �� 2014 CERN, for the ATLAS Collaboration.

Measurements of four-lepton production at the Z resonance in pp collisions at s =7 and 8 TeV with ATLAS

ALOISIO, ALBERTO;ALVIGGI, MARIAGRAZIA;CANALE, VINCENZO;CHIEFARI, GIOVANNI;DELLA VOLPE, DOMENICO;MEROLA, LEONARDO;CONVENTI, FRANCESCO;DELLA PIETRA, MASSIMO;GIORDANO, RAFFAELE;Rossi, Elvira;SANCHEZ PINEDA, ARTURO RODOLFO;
2014

Abstract

Measurements of four-lepton (4, =e,��) production cross sections at the Z resonance in pp collisions at the LHC with the ATLAS detector are presented. For dilepton and four-lepton invariant mass regions m+->5GeV and 80
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/587474
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