H1prelim-04-061

Search for events with tau leptons in ep collisions at HERA

Reference G. Brandt, presented at DIS2004, Spring 2004
Document Conference paper
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Contact Gerhard Brandt, Christian Veelken, Stafania Xella
Abstract The production of $ au$-leptons in $ep$ collisions is studied with the H1 detector at HERA by using an identification algorithm based on the search for isolated charged tracks associated to narrow hadronic jets detected in the calorimeters, a typical signature of the one-prong hadronic $ au$ decay. Using this identification procedure, a search for events with high-$P_T$ isolated $ au$-leptons and missing transverse momentum is performed using a data sample corresponding to an integrated luminosity of 108 pb$^{-1}$ collected with the H1 detector at HERA in the period 1996-2000. This search complements the observation of isolated electrons and muons in events with missing transverse momentum. In addition, a preliminary search for events with $ au$-lepton pairs produced in elastic photon-photon collisions is performed.
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