Search for triboson W±W±W∓ production in pp collisions at √s = 8 TeV with the ATLAS detector
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Date
Authors
Aaboud, M.
Caron, S. Sascha
Colasurdo, L.
Croft, V.A. Vincent Alexander
Groot, N. Nicolo
Filthaut, F. Frank
Galea, C.F. Christine
Konig, A.C. Adriaan
Nektarijevic, S.
Schouwenberg, J.F.P.
Journal Title
Journal ISSN
Volume Title
Publisher
HEPdata
Abstract
CERN-LHC. Measurements on the triboson W+-W+-W-+ production cross-section using two decay channels fully-leptonic W+-W+-W-+ -> l+-nu l+-nu l-+nu and semi-leptonic W+-W+-W-+ -> l+-nu l+-nu jj (with l=e,mu) in proton-proton collision data corresponding to an integrated luminosity of 20.3 fb-1 at a centre of-mass energy of 8 TeV with the ATLAS detector at the Large Hadron Collider. Limits are also sets on WWWW anomalous quartic gauge couplings.
The fully-leptonic channel (W+-W+-W-+ -> l+-nu l+-nu l-+nu ) is defined as (the exact definition is given in table 1 of the preprint):
- Exactly 3 leptons electrons or muons with pT(Lepton)>25 GeV and |eta(Leptons)|<=2.5
- If there are 2 Same Flavor Opposite Signe (SFOS) pairs, MET>55 GeV, if there is 1 SFOS, MET>45 GeV, and if there is 0 SFOS pairs no requirement is applied on the MET.
- If there is no SFOS pairs the invariant mass between any lepton paires mll > 20 GeV. No such requirements is applied in the presence of 1 or 2 SFOS pairs.
- The angle between the trilepton system and the pTMiss must be |phi_3l-phi_met|>2.5
- If there is no SFOS pairs, |mee-mZ|>15 GeV, if there is one SFOS pair mZ-mSFOS>35 Gev or mSFOS-mZ>20 GeV, and if there are two SFOS pairs mSFOS-mZ|>20 GeV.
- There should be at most 1 jet with pT>25 GeV and |eta|<4.5
- DeltaR(l,l)>0.1
The semi-leptonic channel (W+-W+-W-+ -> l+-nu l+-nu jj) is defined as (the exact definition is given in table 2 of the preprint):
- Exactly 2 same-charge leptons electrons or muons with pT(Lepton)>30 GeV and |eta(Leptons)|<=2.5
- Veto the presence of any third lepton with pT>6 GeV and |\eta|<2.5 GeV.
- In the ee final state mee<80 GeV or mee>100 GeV.
- The lepton pair should satisfy mll>40 GeV.
- There should be at least 2 jets with pT(j1)>30 GeV , pT(j2)>30 GeV and |eta|<2.5
- The dijet system should satisfy 65 GeV<mjj< 105 GeV and |Delta_Eta(jj)|<1.5
- If there is at least one electron in the events, MET>55 GeV.
- DeltaR(l,l)>0.1 and DeltaR(l,j)>0.3