The primary goal of the Baby-MIND is a detailed characterisation of its performance, studying charge identication efficiencies for muon momenta between 0.3 and 5 GeV/c on a dedicated beamline. MIND-type detectors are not usually associated with such low energy ranges, because their efficiencies drop sharply below 1 GeV/c due to multiple scattering in the steel plates. We plan to demonstrate their applicability below 1 GeV/c. The Baby-MIND is recognized as an independent activity within the newly created CERN Neutrino Platform.
A Memorandum of Understanding (MoU) has been drafted, describing the project and the relationship between the collaborating institutes and CERN. It is currently undergoing a review before signature by all parties
Baby-MIND is designed to track muons, tell their momentum and determine whether they are positively or negatively charged. These muons result from the interaction of neutrinos with matter, either in the Baby-MIND itself or in other detectors nearby, or surrounding structures (rock, construction steel etc...) . By studying each muon in detail, we can learn more about the parent neutrino that was at the origin of its creation.
Detailed studies of the ability of Baby-MIND to tell the difference between positively and negatively charged muons are planned, especially when these muons have very low momenta, below say 1 GeV/c. At these momenta, in addition to the bending that a muon will experience in the magnetic field of the steel, it will also be scattered by the electric field of the iron nuclei. This scattering process called Multiple Coulomb Scattering can lead to significant errors as the change in track angle of the muon can be different to that predicted from the effect of the magnetic field alone.
Events of interest in a MIND are charged current (CC) interactions resulting in a lepton in the final state. As can be seen, νe events are far more challenging to reconstruct in the MIND, due to the much shorter tracks and similarity with hadronic energy deposition.