Version 2 (modified by trac, 8 years ago) (diff)


W and H+ polarizations in top decays

  1. Generate $e^+e^-  \to t \bar t$ at threshold and force the tops to decay leptonically (to $e$ or $\mu$).
    1. Compare the charged and neutral lepton $p_T$ (or energy) distributions with those shown in the MC lectures.
    2. Explain why the neutrinos tend to have higher $p_T$ than the charged leptons.
    3. How would things change if the decay went via $t\to b H^+$ with $m_{H^+}=m_W$? Check by using

the 2HDM (Use the on-line calculator to get a consistent set of parameters for the 2HDM).

  1. As the previous exercise, but in $pp \to t\bar t$ at the LHC.

-- Main.FabioMaltoni - 06 Dec 2008

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