“Physics with tau leptons at HERA”
Linus Lindfeld
Abstract:
Recent
analyses at HERA deal with a tau lepton in the final state of ep-collisions.
At
the ZEUS experiment, a search for events containing isolated tau leptons
and missing transverse momentum in addition to that due to the
tau decay was performed.
The
analysis, based on isolated tracks from hadronic tau
decays
and the exploitation of the internal jet structure, yields 3
tau candidates
where $0.40^{+0.12}_{-0.13}$ are expected from Standard Model.
With the H1 detector,
the production of high-$P_{T}$ isolated tau leptons was studied
using typical one-prong hadronic tau decays
as identification. In addition, a search for tau lepton pairs
in elastic photon-photon collisions was performed.
Furthermore,
the tau lepton was studied in a search for new physics as a decay product
of a resonantly produced leptoquark
violating the conservation of lepton flavor.