Understanding neutrino interactions and oscillations with off-axis neutrino beams

了解中微子与离轴中微子束的相互作用和振荡

• 批准号: MR/S034102/1
• 负责人: Mark Scott
• 金额: $ 155.88万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=MR%2FS034102%2F1
• 关键词: Understanding; neutrino; interactions; oscillations; off

Explaining the observed excess of matter compared to antimatter in the early universe is one of the biggest questions in physics. Neutrino oscillations can violate the CP symmetry, potentially by an amount large enough to produce this excess. Understanding neutrino oscillations is an essential step to understanding the universe we see today.Hyper-Kamiokande will use a 200-kiloton water Cherenkov detector to measure neutrino oscillations with unprecedented statistical precision. The challenge now is to reduce the systematic uncertainties of Hyper-Kamiokande to ensure the success of its oscillation measurements. Addressing this challenge is the focus of my fellowship.The dominant systematics in long-baseline oscillation experiments are due to the difficulty in relating what is observed in the detector to the neutrino energy. The E61 experiment has been designed to measure neutrino interactions over a range of angles off the J-PARC neutrino beam axis. The peak energy of the neutrino beam decreases as the off-axis angle increases, allowing E61 to directly relate neutrino energy to what is seen in the detector. This link enables E61 to produce a data-driven mapping between neutrino energy and the signatures observed in the detector, significantly reducing the systematic uncertainty associated with this.The E61 method requires a detailed understanding of the E61 detector, in particular the detector fiducial volume. To achieve this I will produce an optical calibration system for the E61 detector that will both map the detector volume and measure the detector response to a known signal. The system will deploy calibration sources and high-resolution cameras within the detector to build a 3D model of the full apparatus, producing an in-situ measurement of both the detector response and geometry, rather than relying on ex-situ measurements of one to calculate the other. This will be developed using a staged approach, with a prototype system installed in the E61 test beam experiment. The prototype will provide essential feedback for the full calibration system, whiile the test beam will provide valuable physics data for the calibration of water Cherenkov detectors.The research that this fellowship enables will address the key challenges in neutrino oscillation physics in two new ways: the use of off-axis beams to understand neutrino interactions and a novel calibration system to understand water Cherenkov detectors. Together these will produce the world's most sensitive search for CP violation in neutrino oscillations.

与早期宇宙中的反物质相比，解释观测到的物质过剩是物理学中最大的问题之一。中微子振荡可能会破坏CP对称性，可能会产生足够大的量来产生过剩。了解中微子振荡是理解我们今天看到的宇宙的关键一步。超神冈德号将使用200千吨重的水切伦科夫探测器以前所未有的统计精度测量中微子振荡。现在的挑战是减少超级神冈的系统不确定性，以确保其振荡测量的成功。解决这一挑战是我的研究重点。在长基线振荡实验中占主导地位的系统学是由于很难将探测器中观察到的东西与中微子能量联系起来。E61实验旨在测量偏离J-Parc中微子束轴一定角度范围内的中微子相互作用。中微子束的峰值能量随着离轴角度的增加而减少，这使得E61可以直接将中微子能量与探测器中所看到的联系起来。这一链接使E61能够在中微子能量和探测器中观察到的信号之间产生数据驱动的映射，大大减少了与此相关的系统不确定性。E61方法需要详细了解E61探测器，特别是探测器的基准体积。为了实现这一点，我将为E61探测器制造一个光学校准系统，该系统将绘制探测器体积图并测量探测器对已知信号的响应。该系统将在探测器内部署校准源和高分辨率摄像机，以建立整个仪器的3D模型，产生探测器响应和几何形状的现场测量，而不是依赖其中一个的非现场测量来计算另一个。这将采用分阶段的方法进行开发，并在E61测试束实验中安装一个原型系统。该原型机将为整个校准系统提供必要的反馈，而测试束将为水切伦科夫探测器的校准提供有价值的物理数据。该研究将以两种新的方式解决中微子振荡物理中的关键挑战：使用离轴光束来理解中微子相互作用，以及一种新的校准系统来理解水切伦科夫探测器。这些加在一起，将产生世界上最灵敏的中微子振荡中CP破坏的搜索。

项目成果

Supernova Model Discrimination with Hyper-Kamiokande

使用 Hyper-Kamiokande 进行超新星模型判别

• DOI: 10.3847/1538-4357/abf7c4
• 发表时间: 2021
• 期刊: The Astrophysical Journal
• 作者: Abe K

Pre-supernova Alert System for Super-Kamiokande

超级神冈的超新星爆发前警报系统

• DOI: 10.3847/1538-4357/ac7f9c
• 发表时间: 2022
• 期刊: The Astrophysical Journal
• 作者: 越阪部晃永;山﨑慈恵;Bhagyshree J;田中祐梨子;小川公美;Zdravko L;Frederic B;角谷徹仁;L. N. Machado 他 Super-Kamiokande collaboration
• 通讯作者: L. N. Machado 他 Super-Kamiokande collaboration

First gadolinium loading to Super-Kamiokande

• DOI: 10.1016/j.nima.2021.166248
• 发表时间: 2021-09
• 期刊: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 作者: K. Abe;C. Bronner;Y. Hayato;K. Hiraide;M. Ikeda;S. Imaizumi;J. Kameda;Y. Kanemura;Y. Kataoka;S. Miki;M. Miura;S. Moriyama;Y. Nagao;M. Nakahata;S. Nakayama;T. Okada;K. Okamoto;A. Orii;G. Pronost;H. Sekiya;M. Shiozawa;Y. Sonoda;Y. Suzuki;A. Takeda;Y. Takemoto;A. Takenaka;H. Tanaka;S. Watanabe;T. Yano;S. Han;T. Kajita;K. Okumura;T. Tashiro;J. Xia;G. Megias;D. Bravo-Berguño;L. Labarga;L. Marti;B. Zaldivar;B. Pointon;F. Blaszczyk;E. Kearns;J. Raaf;J. Stone;L. Wan;T. Wester;J. Bian;N. J. Griskevich;W. Kropp;S. Locke;S. Mine;M. Smy;H. Sobel;V. Takhistov;J. Hill;J. Kim;I. Lim;R. Park;B. Bodur;K. Scholberg;C. Walter;L. Bernard;A. Coffani;O. Drapier;S. Hedri;A. Giampaolo;M. Gonin;T. Mueller;P. Paganini;B. Quilain;T. Ishizuka;T. Nakamura;J. Jang;J. Learned;L. Anthony;D. Martin;M. Scott;A. Sztuc;Y. Uchida;S. Cao;V. Berardi;M. Catanesi;E. Radicioni;N. Calabria;L. Machado;G. De Rosa;G. Collazuol;F. Iacob;M. Lamoureux;M. Mattiazzi;N. Ospina;L. Ludovici;Y. Maekawa;Y. Nishimura;M. Friend;T. Hasegawa;T. Ishida;T. Kobayashi;M. Jakkapu;T. Matsubara;T. Nakadaira;K. Nakamura;Y. Oyama;K. Sakashita;T. Sekiguchi;T. Tsukamoto;T. Boschi;J. Gao;F. Di Lodovico;J. Migenda;M. Taani;S. Zsoldos;Y. Kotsar;Y. Nakano;H. Ozaki;T. Shiozawa;A. Suzuki;Y. Takeuchi;S. Yamamoto;A. Ali;Y. Ashida;J. Feng;S. Hirota;T. Kikawa;M. Mori;T. Nakaya;R. Wendell;K. Yasutome;P. Fernandez;N. McCauley;P. Mehta;K. Tsui;Y. Fukuda;Y. Itow;H. Menjo;T. Niwa;K. Sato;M. Tsukada;J. Lagoda;S. Lakshmi;P. Mijakowski;J. Zalipska;J. Jiang;C. Jung;C. Vilela;M. Wilking;C. Yanagisawa;K. Hagiwara;M. Harada;T. Horai;H. Ishino;S. Ito;F. Kitagawa;Y. Koshio;W. Ma;N. Piplani;S. Sakai;G. Barr;D. Barrow;L. Cook;A. Goldsack;S. Samani;D. Wark;F. Nova;J.Y. Yang;S. J. Jenkins;M. Malek;J. McElwee;O. Stone;M. Thiesse;L. Thompson;H. Okazawa;S. Kim;J.W. Seo;I. Yu;A. Ichikawa;K. Nishijima;M. Koshiba;K. Iwamoto;Y. Nakajima;N. Ogawa;M. Yokoyama;K. Martens;M. Vagins;M. Kuze;S. Izumiyama;T. Yoshida;M. Inomoto;M. Ishitsuka;H. Ito;T. Kinoshita;R. Matsumoto;K. Ohta;M. Shinoki;T. Suganuma;J.F. Martin;H. Tanaka;T. Towstego;R. Akutsu;M. Hartz;A. Konaka;P. de Perio;N. Prouse;S. Chen;B.D. Xu;M. Posiadala-Zezula;D. Hadley;M. O'Flaherty;B. Richards;B. Jamieson;J. Walker;A. Minamino;G. Pintaudi;S. Sano;R. Sasaki

Scintillator ageing of the T2K near detectors from 2010 to 2021

2010 年至 2021 年 T2K 近探测器闪烁体老化

• DOI: 10.1088/1748-0221/17/10/p10028
• 发表时间: 2022
• 期刊: Journal of Instrumentation
• 影响因子: 1.3
• 作者: K.Abe;T.Ishida;Y.Oyama et al.
• 通讯作者: Y.Oyama et al.

Search for proton decay via p ? µ + K 0 in 0.37 megaton-years exposure of Super-Kamiokande

通过 p 寻找质子衰变？

• DOI: 10.1103/physrevd.106.072003
• 发表时间: 2022
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Matsumoto R