Abstract
Our knowledge of neutrino cross sections at the GeV scale, instrumental to test CP symmetry violation in the leptonic sector, has grown substantially in the last two decades. Still, their precision and understanding are far from the standard needed in contemporary neutrino physics. Nowadays, the knowledge of the neutrino cross section at O(10%) causes the main systematic uncertainty in oscillation experiments and jeopardizes their physics reach. In this paper, we envision the opportunities for a new generation of cross section experiments to be run in parallel with DUNE and HyperKamiokande. We identify the most prominent physics goals by looking at the theory and experimental limitations of the previous generation of experiments. We highlight the priorities in the theoretical understanding of GeV cross sections and the experimental challenges of this new generation of facilities.
Highlights
The physics of neutrino oscillations at accelerators [1] has entered a new phase after the approval of DUNE [2] and HyperKamiokande (HK) [3]
The time-honored near-far cancellation technique is reaching its intrinsic limitations and the systematic uncertainty currently dominates the physics reach. This paper addresses this issue in the most direct manner and is mirrored by the outcome of the European Strategy for Particle Physics [13], which has pointed out such weakness in the global effort to measure the neutrino properties
Z and can be extended to cover the simplest nuclear system and explore the high-Z region of relevance for high-density detectors. They are the main driver in gaining a deeper understanding of weak interactions in nuclear physics and provide important data for the study of nuclear structure, which can be tested against nuclear effective theories and, in the long term, lattice QCD
Summary
Antonio Branca 1, * , Giulia Brunetti 1 , Andrea Longhin 2,3 , Marco Martini 4,5 , Fabio Pupilli 3 and Francesco Terranova 1. Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Sorbonne Université, Université Paris Diderot, CNRS/IN2P3, 75005 Paris, France
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