![diagram](slides/il_diagram.gif)
ISOLATED LEPTONS AND
MISSING TRANSVERSE MOMENTUM
Contacts: James Ferrando (ZEUS), David South (H1)
Production of isolated leptons associated with missing transverse momentum has a
very
low cross section in the SM, dominated by real W boson production with subsequent
leptonic decay. A deviation to the SM could sign an anomalous top quark FCNC
coupling to EW bosons or the decay of new particles like SUSY charginos.
H1 + ZEUS combined results:
Events with an Isolated Lepton and Missing Transverse Momentum and Measurement of W Production at HERA Published in JHEP 1003 (2010) 035 (1) Distribution of lepton polar angle![d09-140f1a](exotics/isolated_leptons/combined_plots_thumb/d09-140f1a.gif)
Distribution of lepton polar angle
(2) Distribution of the difference in the azimuthal angle of the lepton and the hadronic system
![d09-140f1b](exotics/isolated_leptons/combined_plots_thumb/d09-140f1b.gif)
Distribution of the difference in the azimuthal angle of the lepton and the hadronic system
(3) Transverse Mass
![d09-140f1c](exotics/isolated_leptons/combined_plots_thumb/d09-140f1c.gif)
Transverse Mass
(4) Hadronic transverse momentum
![d09-140f1d](exotics/isolated_leptons/combined_plots_thumb/d09-140f1d.gif)
Hadronic transverse momentum
(5) Missing transverse momentum
![d09-140f1e](exotics/isolated_leptons/combined_plots_thumb/d09-140f1e.gif)
Missing transverse momentum
(6) Lepton transverse momentum
![d09-140f1f](exotics/isolated_leptons/combined_plots_thumb/d09-140f1f.gif)
Lepton transverse momentum
(7) Hadronic transverse momentum for e+p data
![d09-140f2a](exotics/isolated_leptons/combined_plots_thumb/d09-140f2a.gif)
Hadronic transverse momentum for e+p data
(8) Hadronic transverse momentum for e-p data
![d09-140f2b](exotics/isolated_leptons/combined_plots_thumb/d09-140f2b.gif)
Hadronic transverse momentum for e-p data
(9) Single W production cross section as a function of PT of the hadronic system
![d09-140f3](exotics/isolated_leptons/combined_plots_thumb/d09-140f3.gif)
Single W production cross section as a function of PT of the hadronic system