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Events with an Isolated Lepton (Electron or Muon) and missing transverse momentum at HERA |
| Reference |
Ytsen DeBoer, presented at DIS '07, Spring 2007 |
| Document |
Conference paper or talk
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| Figures |
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| Contact |
D. South, C. Diaconu, G. Brandt |
| Abstract |
The search for events containing isolated leptons (electrons or muons) and
missing transverse momentum produced in $e^\pm p$ collisions is performed with
the H1 detector at HERA in the period 1994--2007. The analysed data sample corresponds
to an integrated luminosity of 478~pb$^{-1}$, which includes 189~pb$^{-1}$ of
$e^{+}p$ data and 170 pb$^{-1}$ of $e^{-}p$ data from the new HERA~II phase. A total
of 59 events are observed in the complete HERA data, compared to a Standard Model
(SM) prediction of 58.9~$\pm$~8.2. At large hadronic transverse momentum $P_{T}^{X} >$~25~GeV, a total of 24 events are
observed compared to a SM prediction of 15.8~$\pm$~2.5. In this region, 21 events are
observed in the $e^{+}p$ data compared to a SM prediction of 8.9~$\pm$~1.5, whereas in
the $e^{-}p$ data 3 events are observed compared to a SM prediction of 6.9~$\pm$~1.0. |
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