H1prelim-07-162
H1 and ZEUS

Isolated Leptons and Missing PT: H1+ZEUS combination

Reference EPS07 talk David South, Summer 2007
Document Conference paper or talk
Figures  (1a)  (1b)  (2a)  (2b)  (3a)  (3b)
Tables
Contact D. South, C. Diaconu
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 and ZEUS detectors at HERA in the period 1994--2007. The analysed data sample corresponds to an integrated luminosity of 0.97~fb$^{-1}$. A total of 87 events are observed in the data, compared to a Standard Model (SM) prediction of 92.7~$\pm$~11.2. At large hadronic transverse momentum $P_{T}^{X} >$~25~GeV, a total of 29 events are observed compared to a SM prediction of 25.3~$\pm$~3.2. In this kinematic region, 23 events are observed in the $e^{+}p$ data compared to a SM prediction of 14.6~$\pm$~1.9.
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