E. Worcester

Baseline Optimization for the Measurement of CP Violation, Mass Hierarchy, and

The goals of next-generation neutrino experiments include searching for CP violation in the lepton sector and precision studies of the neutrino mixing matrix. These measurements require an optimal combination of the experimental baseline (the distance between the neutrino source and detector) and the neutrino beam energy. In this paper, we study the baseline optimization for a longbaseline neutrino experiment, assuming a wide-band neutrino beam originating from the Fermilab proton complex.

\theta_{23}

A session studying systematics in long-baseline neutrino oscillation physics was held July 14-18, 2014 as part of CETUP* 2014. Systematic effects from flux normalization and modeling, modeling of cross sections and nuclear interactions, and far detector effects were addressed. Experts presented the capabilities of existing and planned tools. A program of study to determine estimates of and requirements for the size of these effects was designed. This document summarizes the results of the CETUP* systematics workshop and the current status of systematic uncertainty studies in long-baseline neutrino oscillation measurements.

Octant in a Long-Baseline Neutrino Oscillation Experiment

Abstract ORKA is a proposed experiment to measure the K + → μ + ν ν ¯ branching ratio with 5% precision using the Fermilab Main Injector high intensity proton source. The detector design is based on the BNL E787/E949 experiments, which detected seven K + → μ + ν ν ¯ candidate events. Two orders of magnitude improvement in sensitivity relative to the BNL experiments comes from enhancements to the beam line and the detector acceptance. Precise measurement of the K + → μ + ν ν ¯ branching ratio with the same level of uncertainty as the well-understood Standard Model prediction allows for sensitivity to new physics at and beyond the LHC mass scale.

Summary of Long-Baseline Systematics Session at CETUP*2014

The 35-ton prototype for the Deep Underground Neutrino Experiment far detector was a single-phase liquid argon time projection chamber with an integrated photon detector system, all situated inside a membrane cryostat. The detector took cosmic-ray data for six weeks during the period of February 1, 2016 to March 12, 2016. The performance of the photon detection system was checked with these data. An installed photon detector was demonstrated to measure the arrival times of cosmic-ray muons with a resolution better than 32 ns, limited by the timing of the trigger system. A measurement of the timing resolution using closely-spaced calibration pulses yielded a resolution of 15 ns for pulses at a level of 6 photo-electrons. Scintillation light from cosmic-ray muons was observed to be attenuated with increasing distance with a characteristic length of

ORKA: The Golden Kaon Experiment

155 \pm 28

Photon detector system timing performance in the DUNE 35-ton prototype liquid argon time projection chamber

cm.