Neutron–antineutron oscillation accompanied by CP-violation in magnetic fields

IF 3.4 3区物理与天体物理 Q2 PHYSICS, NUCLEAR

Journal of Physics G: Nuclear and Particle Physics Pub Date : 2024-08-21 DOI:10.1088/1361-6471/ad66ef

Yongliang Hao, Kamphamba Sokalao Nyirenda, Zhenwei Chen

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引用次数: 0

Abstract

In this work, we explore the possibility of the n–

n¯

oscillation accompanied by CP-violation in the presence of magnetic fields. The n–

n¯

oscillation, which violates the baryon number (

) by two units (

∣ΔB∣=2

), can originate from the mixing between the neutron (n) and the neutral elementary particle (η) and may give rise to non-trivial physical consequences that can be testable in future experiments. We show that the probability of the n–

n¯

oscillation can be greatly enhanced by properly adjusting the magnetic field. In particular, the peak values of the oscillation probability in the presence of resonance magnetic fields can be 8–10 orders of magnitude higher than that in the absence of magnetic fields. We point out that there might not be sizable CP-violating effects in the n–

n¯

oscillation unless the mass of η is close to the mass of the neutron. We also analyze the interplay among various parameters associated with both

-violation and CP-violation and attempt to disentangle the effects of such parameters. The n–

n¯

oscillation process accompanied by CP-violation may open a promising avenue for exploring new physics beyond the Standard Model (SM).

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磁场中伴随 CP 破坏的中子-泛中子振荡

在这项工作中，我们探讨了在磁场存在的情况下，n-n¯振荡伴随着CP违反的可能性。n-n'振荡违反了重子数（B）的两个单位（∣ΔB∣=2），它可能源于中子（n）和中性基本粒子（η）之间的混合，并可能引起非微妙的物理后果，这些后果可以在未来的实验中得到检验。我们的研究表明，通过适当调整磁场，n-n¯振荡的概率可以大大提高。特别是，在存在共振磁场的情况下，振荡概率的峰值可以比没有磁场时高 8-10 个数量级。我们指出，除非η的质量接近中子的质量，否则n-n¯振荡中可能不会有相当大的违反CP效应。我们还分析了与 B-violation 和 CP-violation 相关的各种参数之间的相互作用，并试图厘清这些参数的影响。伴随着 CP-violation 的 n-n¯ 振荡过程可能为探索标准模型（SM）之外的新物理开辟了一条大有可为的途径。

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

Journal of Physics G: Nuclear and Particle Physics 物理-物理：核物理

CiteScore

7.60

自引率

5.70%

发文量

105

审稿时长

1 months

期刊介绍： Journal of Physics G: Nuclear and Particle Physics (JPhysG) publishes articles on theoretical and experimental topics in all areas of nuclear and particle physics, including nuclear and particle astrophysics. The journal welcomes submissions from any interface area between these fields. All aspects of fundamental nuclear physics research, including: nuclear forces and few-body systems; nuclear structure and nuclear reactions; rare decays and fundamental symmetries; hadronic physics, lattice QCD; heavy-ion physics; hot and dense matter, QCD phase diagram. All aspects of elementary particle physics research, including: high-energy particle physics; neutrino physics; phenomenology and theory; beyond standard model physics; electroweak interactions; fundamental symmetries. All aspects of nuclear and particle astrophysics including: nuclear physics of stars and stellar explosions; nucleosynthesis; nuclear equation of state; astrophysical neutrino physics; cosmic rays; dark matter. JPhysG publishes a variety of article types for the community. As well as high-quality research papers, this includes our prestigious topical review series, focus issues, and the rapid publication of letters.