Probing the Neutrino-Mass Scale with the KATRIN Experiment

IF 9.1 2区物理与天体物理 Q1 PHYSICS, NUCLEAR

Annual Review of Nuclear and Particle Science Pub Date : 2022-07-09 DOI:10.1146/annurev-nucl-101920-113013

Alexey Lokhov, Susanne Mertens, Diana S. Parno, Magnus Schlösser, Kathrin Valerius

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引用次数: 1

Abstract

The absolute mass scale of neutrinos is an intriguing open question in contemporary physics. The as-yet-unknown mass of the lightest and, at the same time, most abundant massive elementary particle species bears fundamental relevance to theoretical particle physics, astrophysics, and cosmology. The most model-independent experimental approach consists of precision measurements of the kinematics of weak decays, notably tritium β decay. With the KATRIN experiment, this direct neutrino-mass measurement has entered the sub-eV domain, recently pushing the upper limit on the electron-based neutrino mass down to 0.8 eV (90% CL) on the basis of first-year data out of ongoing, multiyear operations. Here, we review the experimental apparatus of KATRIN, the progress of data taking, and initial results. While KATRIN is heading toward the target sensitivity of 0.2 eV, other scientific goals are pursued. We discuss the search for light sterile neutrinos and an outlook on future keV-scale sterile-neutrino searches as well as further physics opportunities beyond the Standard Model.

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用KATRIN实验探测中微子质量尺度

中微子的绝对质量尺度是当代物理学中一个有趣的开放性问题。迄今为止，最轻、同时也是最丰富的大质量基本粒子的质量是未知的，这与理论粒子物理学、天体物理学和宇宙学有着根本的联系。最独立于模型的实验方法包括对弱衰变，特别是氚β衰变的运动学的精确测量。通过KATRIN实验，这种直接的中微子质量测量已经进入了亚eV领域，最近将电子基中微子质量的上限降低到0.8 eV (90% CL)，这是基于正在进行的多年操作的第一年数据。本文综述了KATRIN的实验装置、数据采集进展和初步结果。当KATRIN朝着0.2 eV的目标灵敏度前进时，其他的科学目标也在追求中。我们讨论了对光惰性中微子的搜索，并展望了未来的k -尺度惰性中微子搜索以及超越标准模型的进一步物理机会。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Annual Review of Nuclear and Particle Science 物理-物理：核物理

CiteScore

21.50

自引率

0.80%

发文量

期刊介绍： The Annual Review of Nuclear and Particle Science is a publication that has been available since 1952. It focuses on various aspects of nuclear and particle science, including both theoretical and experimental developments. The journal covers topics such as nuclear structure, heavy ion interactions, oscillations observed in solar and atmospheric neutrinos, the physics of heavy quarks, the impact of particle and nuclear physics on astroparticle physics, and recent advancements in accelerator design and instrumentation. One significant recent change in the journal is the conversion of its current volume from gated to open access. This conversion was made possible through Annual Reviews' Subscribe to Open program. As a result, all articles published in the current volume are now freely available to the public under a CC BY license. This change allows for greater accessibility and dissemination of research in the field of nuclear and particle science.