Performance of the MIND detector at a Neutrino Factory using realistic muon reconstruction
Abstract
A Neutrino Factory producing an intense beam composed of nue(nubare) and nubarmu(numu) from muon decays has been shown to have the greatest sensitivity to the two currently unmeasured neutrino mixing parameters, theta13 and deltaCP . Using the `wrong-sign muon' signal to measure nue to numu(nubare to nubarmu) oscillations in a 50 ktonne Magnetised Iron Neutrino Detector (MIND) sensitivity to deltaCP could be maintained down to small values of theta13. However, the detector efficiencies used in previous studies were calculated assuming perfect pattern recognition. In this paper, MIND is re-assessed taking into account, for the first time, a realistic pattern recognition for the muon candidate. Reoptimisation of the analysis utilises a combination of methods, including a multivariate analysis similar to the one used in MINOS, to maintain high efficiency while suppressing backgrounds, ensuring that the signal selection efficiency and the background levels are comparable or better than the ones in previous analyses.
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