Version 1 (modified by trac, 6 years ago) (diff)

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### What is a TransferFunction?

The transfer function is the conditional probability to observe a detector-level event, given a certain parton-level configuration. In particular, this function includes the response of the detector. In MadWeight, we will consider that the transfer function can be factorized in a product of resolution functions associated to each external (or initial) particle. Furthermore we will assume that these functions are factorized in the energy, the rapidity and the azimutal angle of each final state particle.

The resolution function associated to a missing particle (i.e. a neutrino) equals one. Otherwise it depends on the capabilities of the detector: for well measured quantities the resolution function looks like a narrow gaussian (for exemples: Energy of muons). Examples of transfer functions are given below.

### Standard TransferFunctions

#### dbl_gauss_pt_jet

This transfer function is the standard one, this is the transfer functions use by Canneli in her PHd thesis.

• a delta function is associated to each visible angle,
• a delta function is associated to the energy of each lepton
• the resolution function for each jet/bjet energy is parametrized as a double Gaussian distribution depending on five parameters, each of them being a function of the Energy of the jet (for examplt %% ), resulting in 15 constants to be fitted by MC simulations.

#### uniform

This transfer function is needed in order to test the phase-space volume and the total cross section. It is 1 regardless of the parton-level state.

#### all_delta

All transfer function are put on delta

### How to create a new one with version before 2.1.2 ?

• copy the transfer function template: $> cp -rf ./Transfer_Fct/new_transfer/ ./Transfer_Fct/MY_TF • go into your new directory:$> cd ./Transfer_Fct/MY_TF