A Bayesian technique for improving the sensitivity of the atmospheric neutrino L/E analysis

作者：Blake A S T^*; Chapman J D; Thomson M A

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2013, 707: 127-134.

DOI：10.1016/j.nima.2012.12.088

• Neutrino oscillations
• Atmospheric neutrinos
• MINOS experiment

This paper outlines a method for improving the precision of atmospheric neutrino oscillation measurements. One experimental signature for these oscillations is an observed deficit in the rate of nu(mu) charged-current interactions with an oscillatory dependence on L-nu/E-nu, where L-nu is the neutrino propagation distance and E-nu is the neutrino energy. For contained-vertex atmospheric neutrino interactions, the L-nu/E-nu resolution varies significantly from event to event. The precision of the oscillation measurement can be improved by incorporating information on L-nu/E-nu resolution into the oscillation analysis. In the analysis presented here, a Bayesian technique is used to estimate the L-nu/E-nu resolution of observed atmospheric neutrinos on an event-by-event basis. By separating the events into bins of L-nu/E-nu resolution in the oscillation analysis, a significant improvement in oscillation sensitivity can be achieved.

• 出版日期2013-4-11