Probing the Neutrino-Mass Scale with the KATRIN Experiment

被引：3
作者：
Lokhov, Alexey [1 ,2 ]
Mertens, Susanne [3 ,4 ]
Parno, Diana S. [5 ]
Schloesser, Magnus [6 ]
Valerius, Kathrin [6 ]
机构：
[1] Karlsruhe Inst Technol, Inst Expt Particle Phys, Karlsruhe, Germany
[2] Westfalische Wilhelms Univ Munster, Inst Kernphys, Munster, Germany
[3] Tech Univ Munich, Phys Dept, Garching, Germany
[4] Max Planck Inst Phys & Astrophys, Munich, Germany
[5] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA
[6] Karlsruhe Inst Technol, Inst Astroparticle Phys, Karlsruhe, Germany
来源：
ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE | 2022年 / 72卷
基金：
欧洲研究理事会;
关键词：
neutrino mass; direct kinematic method; tritium beta decay; ELECTRON-CAPTURE; HIGH-RESOLUTION; TRITIUM; HO-163; DECAY;
D O I：
10.1146/annurev-nucl-101920-113013
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
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 beta 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.
引用
收藏
页码：259 / 282
页数：24
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