Simulation of long-baseline neutrino oscillation experiments with GLoBES: (General Long Baseline Experiment Simulator) Original Research Article

We present the GLoBES (“General Long Baseline Experiment Simulator”) software package, which allows the simulation of long-baseline and reactor neutrino oscillation experiments. One part of the software is the abstract experiment definition language to define experiments with beam and full detector descriptions as accurately as possible. Many systematics options are provided, such as normalization and energy calibration errors, or the choice between spectral or total rate information. For the definition of experiments, a new transparent building block concept is introduced. In addition, an additional program provides the possibility to develop and test new experiment definitions quickly. Another part of GLoBES is the userʹs interface, which provides probability, rate, and image information for a given experiment or any combination of up to 32 experiments in C. Especially, the image functions allow a simulation with statistics only, systematics, correlations, and degeneracies. In particular, GLoBES can handle the full multi-parameter correlation among the oscillation parameters, external input, and matter density uncertainties.