Hyper-Kamiokande (UK Strategy for Long Baseline Neutrino Oscillation Experiments)

英国处于基于加速器的中微子振荡物理的前沿，并准备在多用途、高精度的Hyper-Kamiokande实验中发挥重要作用，该实验为发现轻子部门的CP破坏提供了前所未有的潜力。人们普遍认为，轻子部门CP破坏的发现对粒子物理的进步至关重要，因为它暗示了轻子部门对宇宙中物质-反物质不对称做出重大贡献的令人兴奋的可能性。该实验还将通过显著提高中微子振荡参数的精确度和解决简并问题(例如theta23八分)，提供关于关键中微子振荡参数的迫切需要的信息。超级神冈是成功的T2K实验的升级，或称第二阶段，英国在这项实验中发挥了主导作用，并在最近对电子中微子出现的观测中发挥了主要作用。莱特牧师。061802(2014年))。升级的多兆瓦波束，25倍大的远探测器和升级的近探测器套件，以及潜在的2公里探测器，是新实验的特点。FAR探测器Hyper-Kamiokande(HK)是新一代多用途地下水切伦科夫探测器，它将提供对观测CP破坏至关重要的超灵敏度，并极大地扩大对质子衰变的搜索，使人们能够详细研究大气中微子(允许测量中微子质量等级)，以及研究来自天文来源的中微子。对太阳中微子的精确测量、对太阳耀斑的观测、中微子地球物理也包括在实验的广泛物理组合中。超神冈实验是日本粒子物理和天体物理计划的核心。这是一项强有力的国际承诺，英国正在引领欧盟的努力。如此高精度的实验将需要在许多领域进行创新。英国的努力目标是利用现有专业知识并确保在实验中发挥突出作用的战略领域，以确保充分开发实验的物理潜力。

The UK is at the forefront of accelerator-based neutrino oscillation physics and is poised to play a prominent role in the multi-purpose, precision Hyper-Kamiokande experiment that offers unprecedented potential for the discovery of CP violation in the leptonic sector. It is universally agreed that the discovery of CP violation in the leptonic sector is critical to progress in particle physics, as it implies the exciting possibility that the lepton sector significantly contributes to the matter-antimatter asymmetry in the Universe. The experiment will also provide much needed information on key neutrino oscillation parameters by significantly increasing their precision and addressing degeneracies (e.g. the theta23 octant). Hyper-Kamioka is the upgrade, or phase II, of the successful T2K experiment in which the UK has a leading role and was a major player in the recent observation of the electron neutrino appearance (Phys. Rev. Lett. 112, 061802 (2014)). An upgraded multi-MW beam, a 25 times larger far-detector and an upgraded suite of near detectors, with a potential 2km detector, characterize the new experiment. The far detector, Hyper-Kamiokande (HK), is a next generation, multi-purpose, underground Water Cherenkov detector that will provide hyper-sensitivity that is crucial for the observation of CP-violation as well as greatly extending the search for proton decays, allowing a detailed study of atmospheric neutrinos (permitting the measurement of the neutrino mass hierarchy), and studies of neutrinos from astronomical origins. Precision measurements of solar neutrinos, observation of solar flares, neutrino geophysics are also included in the vast physics portfolio of the experiment.The Hyper-Kamiokande experiment is central to the particle physics and astrophysics programme in Japan,. There is a strong international commitment and the UK is leading the EU effort.Such a high precision experiment will require innovation in many areas. The UK effort is targeting strategic areas that exploit current expertise and ensure prominent roles within the experiment guaranteeing full exploitation of the physics potential of the experiment.