Events with Isolated Leptons and Missing Transverse Momentum in ep Collisions at HERA

Details Events with Isolated Leptons and Missing Transverse Momentum in ep Collisions at HERA Events with Isolated Leptons and Missing Transverse Momentum in ep Collisions at HERA

2007-01-28

arxiv.org/abs/hep-ex/0701050v1

Physics

High Energy Physics

High Energy Physics - Experiment

Talk at the ISSP-2006, Erice (to appear in the proceedings)

Scientific paper

The analysis of events with isolated leptons and missing transverse momentum in the H1 experiment is discussed for the electron, muon and tau channels. In the Standard Model (SM) framework, production of real W-bosons gives rise to such topologies. Contributions to the background are dominated by QCD processes. An excess of observed signal over background presents a chance of the discovery of new physics. The results using the HERA 1994-2006 data set corresponding to 341 pb^-1 are presented. While the e- p sample shows good agreement between data and SM expectation, in e+ p collisions an excess over the SM expectation with 3.4 sigma significance is observed at high hadronic transverse momentum.

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