| Title: | Cross Section Measurement of τ Pairs in Two-Photon Collisions with the L3 detector at LEP 2 |
| DOI No: | 10.1142/9789812777157_0043 |
| Source: | PHOTON 2001 (pp 217-222)
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| Author(s): | Daniel Haas
University of Basle, Institute for Physics, Klingelbergstrasse 82, CH – 4056, Basel, Switzerland
Maneesh Wadhwa
University of Basle, Institute for Physics, Klingelbergstrasse 82, CH – 4056, Basel, Switzerland
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| Abstract: | The production of τ pairs in γγ collisions is studied with the L3 detector at LEP. Data were collected at  for a total integrated luminosity of 608.1 pb-1. An exclusive decay channel is considered, with τ± → e± → ντνe and τ∓ → ρ∓ντ, with ρ∓ → π∓π0. The cross section σ (e+e- → e+e-τ+τ-) is compared to  QED calculations. The cross section of τ prduction is measured in γγ collisions for the first time at LEP 2. |
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