Tau Lepton Production in ep Collisions at HERA

TL;DR

This paper reports the first measurement of tau lepton pair production cross section in ep collisions at HERA, using data from 1994-2000, and finds results consistent with the Standard Model.

Contribution

It provides the first measurement of tau lepton pair production cross section at HERA and searches for events with isolated tau leptons and missing transverse momentum.

Findings

Tau pair production cross section measured for the first time at HERA.

Results agree with Standard Model predictions.

Search for isolated tau events with large missing transverse momentum conducted.

Abstract

The production of tau leptons in ep collisions is investigated using data recorded by the H1 detector at HERA in the period 1994-2000. Tau leptons are identified by detecting their decay products, using leptonic and hadronic decay modes. The cross section for the production of tau lepton pairs is measured for the first time at HERA. Furthermore, a search for events with an energetic isolated tau lepton and with large missing transverse momentum is performed. The results are found to be in agreement with the Standard Model predictions.