近日，比利时安特卫普大学的N. van Remortel与比利时布鲁塞尔自由大学的M. Colomer Molla等人合作并取得一项新进展。经过不懈努力，他们提出在中短基线反应堆实验中寻找重中性轻子的前景。相关研究成果已于2024年7月12日在国际知名学术期刊《高能物理杂志》上发表。

本文以SoLid、JUNO和TAO实验为例，讨论了在中短基线反应堆中微子实验中，寻找MeV质量范围内的重中微子的机会。这些实验可以给出目前在2 - 9MeV质量范围内，轻电子中微子和重电子中微子混合的最强上限。

据悉，原则上，质量在MeV范围内的重中微子，可以同时解释轻中微子的质量和宇宙中重子物质的起源。对它们性质的最大限制来自于，它们对早期宇宙中轻元素形成的潜在影响。由于这些约束依赖于对宇宙历史的假设，因此在实验室进行独立研究是非常可取的。

附：英文原文

Title: Prospects for heavy neutral lepton searches at short and medium baseline reactor experiments

Author: van Remortel, N., Colomer Molla, M., Clerbaux, B., De Roeck, A., Drewes, M., Keloth, R., Sfar, H., Vercaemer, S., Verstraeten, M.

Issue&Volume: 2024-07-12

Abstract: Heavy neutrinos with masses in the MeV range can in principle simultaneously explain the light neutrino masses and the origin of baryonic matter in the universe. The strongest constraints on their properties come from their potential impact on the formation of light elements in the early universe. Since these constraints rely on assumptions about the cosmic history, independent checks in the laboratory are highly desirable. In this paper, we discuss the opportunity to search for heavy neutrinos within the MeV mass range in short and medium baseline reactor neutrino experiments, using the SoLid, JUNO and TAO experiments as examples. These experiments can give the currently strongest upper bound on the mixing between the light electron neutrinos and the heavy neutrino in the 2–9 MeV mass range.

DOI: 10.1007/JHEP07(2024)128

Source: https://link.springer.com/article/10.1007/JHEP07(2024)128