Search for Neutrino Charge-Parity (CP) Violation from a Global 3-Flavour Analysis of Neutrino and Antineutrino Data from Long-Baseline Accelerator-Bas

为什么宇宙主要由物质组成，而不是由物质和反物质的相等部分组成，这是现代科学中最耐人寻味的问题之一。观测到的宇宙重子不对称(BAU)所需的条件之一是电荷宇称(CP)对称性的破坏。在粒子物理的标准模型(SM)中，CP破坏的来源很少：1)Cabibbo-Kobayashi-Maskawa(CKM)夸克混合矩阵中的CP破坏相；ii)量子色动力学(QCD)真空角；以及III)Pontecorvo-Maki-Nakagawa-Sakata(PMNS)中微子混合矩阵中的CP破坏相。众所周知，前两个中微子太弱，不足以解释观测到的BAU，因此对后一个中微子的测量非常有意义！T2K和Nova加速器的长基线中微子实验都提供了中微子CP破坏的证据。这篇论文的主要目的是利用T2K的全部统计数据得出最终的T2K CP违例结果，此外，还有助于对T2K和NOVA数据的联合分析。

Why the universe is made up primarily by matter, and not by equal parts of matter and antimatter, is one most intriguing questions in modern science. One of the conditions required for the observed Baryon Asymmetry of the Universe (BAU) is the violation of Charge-Parity (CP) symmetry. There are very few sources of CP violation in the Standard Model (SM) of Particle Physics: i) The CP-violating phase in the Cabibbo-Kobayashi-Maskawa (CKM) quark mixing matrix, ii) the Quantum Chromodynamics (QCD) vacuum angle, and iii) the CP-violating phase in the Pontecorvo-Maki-Nakagawa-Sakata (PMNS) neutrino mixing matrix. The first two are known to be too weak to explain the observed BAU, so a measurement of the latter is of tremendous interest!Evidence for neutrino CP violation has been produced both by the T2K and NOvA accelerator-based long-baseline neutrino experiments. The main goal of this thesis is to produce the final T2K CP violation result using the full T2K statistics and, in addition, to contribute towards a joint analysis of T2K and NOvA data.