Deep Neural Network application: Higgs boson CP state mixing angle in H to tau tau decay and at LHC

Understand

The consecutive steps of cascade decay initiated by H to tau tau can be useful for the measurement of Higgs couplings and in particular of the Higgs boson parity.

• In the previous papers we have found, that multi-dimensional signatures of the tau^pm to pi^pm pi^0 nu and tau^pm to 3pi^pm nu decays can be used to distinguish between scalar and pseudoscalar Higgs state.
• The Machine Learning techniques (ML) of binary classification, offered break-through opportunities to manage such complex multidimensional signatures.
• The classification between two possible CP states: scalar and pseudoscalar, is now extended to the measurement of the hypothetical mixing angle of Higgs boson parity states.