luketpickering/prob3-wrapper

prob3++wrapper

A simple wrapper for prob3++ the neutrino oscillation probability calculator for use with ROOT.

build

With you root environment setup, run build.sh, if all goes well you should end up with WrappedProb3++.20121225.so in the current working directory.

usage

See example.C as an exampled of how to use the interface. The R__LOAD_LIBRARY is only applicable to ROOT6 and above.

The beam dip angle is used to calculate the chord through the earth and thus the baseline. DUNE is 5.8 degrees.

The 6 oscillation parameters are then given to OscillationHelper::Setup to instantiate the oscillation calculation. Angle are set as sin^2(mix_ang_rad), mass splittings are in eV, and dcp is cyclic from -pi to pi (or 0 to 2pi).

An oscillation channel is then set with OscillationHelper::SetOscillationChannel where the neutrinos have their standard PDG MC numbers (nue[bar] : 12/[-12], numu : 14, nutau : 16), e.g. muon neutrino disappearance would set SetOscillationChannel(14,14);

An oscillation probability is then obtained from OscillationHelper::GetWeight(energy), where the energy should be in GeV.

ROOT 5

For whatever reason, I cannot get gSystem->Load to work, so the workaround is to just compile your 'macros' to native binaries, the ROOT5 example here just disables the cling library macro and wraps the standard example in a main function.

Compile like compile_macro.sh example_R5.C, which should produce example_R5.exe, that can then be run like ./example_R5.exe to produce the same output as example.C. Note for any pure ROOT and Prob3++ macro, the above compile_macro.sh should produce a working binary.