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T: Fachverband Teilchenphysik

T 73: Higgs-Boson 6 (Zerfälle in Tau-Leptonen)

T 73.9: Vortrag

Mittwoch, 29. März 2017, 18:45–19:00, JUR 3

Measurement of the energy scale of charged and neutral pions in hadronic τ decays at CMS — Vladimir Cherepanov, Gunter Flugge, •Olena Hlushchenko, Bastian Kargoll, Wolfgang Lohmann, Thomas Muller, Alexander Nehrkorn, Claudia Pistone, Hale Sert, Achim Stahl, and Alexander Zotz — III. Physikalisches Institut B, RWTH Aachen University, D-52056 Aachen

Decays of the Higgs bosons into two τ leptons are most promising to study Higgs boson coupling to fermions. To calculate the mass of the di-tau system, any bias in the energy measurement of the tau lepton decay products must be determined and corrected for. Since charged and neutral pions are measured using different sub-detectors these corrections should be estimated separately.

For this purpose K_s⁰ mesons decaying either into two neutral or two charged pions are used and the procedure will be covered during the talk. Energies of the pions are scaled such that their invariant mass peak value equals to the nominal K_s⁰ mass.

This approach is explicitly interesting for all analyses involving τ’s. Possible application in the context of H→ττ analysis is discussed.