With discovery of the (presumably Standard Model) Higgs boson,
it is necessary to confirm that all its couplings and properties are
indeed as they should be, for the Higgs boson of the Standard Model.
We will concentrate on the measurement of Higgs coupling
to the tau leptons, to confirm if it is of a scalar, pseudoscalar
or mixed parity nature.
Tau decays to 2 pions and 3 pions will be used, but not utilising the
the tau decay vertex which is an independent possibility.
Due to the multi-dimensional nature of the decay, evaluation of a
sensitive observable requires a multivariate approach such as Neural
Networks.
In the study we need to combine (i) properties of tau decay and Higgs
production and decay (ii) geometrical properties of the combined tau
production and decay distributions (iii) appropriate computing methods
(iv) properties of detector response and background.
Studies of (i) to (iii) were found to be promising. We turn our attention now
to detector conditions which may heavily impact the sensitivity of input
features and thus the final observable.