Excellent constraints on sources of systematic uncertainty will be critical to LBNE's success in the study of long-baseline neutrino oscillation. Discovery level sensitivity to CP violation across a significant fraction of the allowed parameter space requires thousands of fully reconstructed and well characterized events, low background, and exposures of hundreds of kt-MW-years. Systematic uncertainties are required to be below statistical uncertainties so as not to limit the discovery potential. Current estimates of systematic uncertainty levels are based on experience with recent long-baseline experiments. The largest contributions to uncertainty in the electron-neutrino appearance sample result from uncertainties in beam flux, far-detector energy scale, and simulation of neutrino interactions.
To date, LBNE's estimates of expected systematic uncertainty have been based largely on extrapolation from experience with other experiments. It is, however, imperative to validate these estimates using LBNE-specific studies and to develop LBNE-specific analysis algorithms that will minimize systematic uncertainty. In addition, the results from previous experiments need be studied in greater detail, and the expected results of near-term experiments need to be considered.
The long-baseline systematics session of CETUP*14 will bring together experts from LBNE's long-baseline physics working group and systematics task force to collaborate with each other and with experts from the near detector group whose CETUP*14 session will run concurrently. The exact topics of study will be determined by the progress made by the systematics task force prior to the workshop; the goal of the CETUP*14 systematics session is to take advantage of the working time and overlap with the ND session to address systematics that have either been difficult to characterize, or that in the current scheme make large contributions to the overall error budget.