Wuppertal 2015 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 87: W Eigenschaften: Masse und Produktion
T 87.9: Vortrag
Donnerstag, 12. März 2015, 18:45–19:00, L.10.31 (HS 10)
A measurement of the polarization of τ leptons produced in Z decays at CMS — •Vladimir Cherepanov, Günter Flügge, Bastian Kargoll, Alexander Nehrkorn, Ian M. Nugent, Claudia Pistone, Achim Stahl, and Alexander Zotz — III. Physikalisches Institut B, RWTH Aachen University, D-52056 Aachen
Extensive measurements of the τ lepton polarization and its forward-backward asymmetry at the Z0 resonance have been performed at LEP. Today, the LHC provides the opportunity for testing the Standard Model of electroweak interactions with τ leptons through a measurement of their forward-backward asymmetry and their polarization. Additional challenges at the LHC are the huge QCD background and the unknown τ lepton energy. The study on the τ lepton polarization at CMS using the Z0→τµτ3π final state are presented.