中微子星团中的超流态性

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 : 2024-06-06 DOI:10.1088/1361-6471/ad4d08

Maxim Dvornikov

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引用次数: 0

摘要

我们研究了中微子簇内中微子超流体凝聚态的形成。中微子之间的吸引力相互作用是由比中微子更轻的标量玻色子介导的。我们考虑了由具有相反方向自旋的粒子组成的中微子束缚态的出现。我们推导出了这种系统的间隙方程。基于对中微子在星团中分布的数值模拟，我们找到了该系统不同参数下的相变温度和星团内部的相干长度。推导出了导致中微子超流的尤卡瓦相互作用参数的约束条件。我们得出，宇宙中微子背景能够对具有现实特征的中微子簇内部的超流体凝聚态做出贡献。提出了基于质子Čerenkov辐射的早期宇宙中微子簇冷却机制。

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Superfluidity in neutrino clusters

We study the formation of a superfluid condensate of neutrinos inside a neutrino cluster. The attractive interaction between neutrinos is mediated by a scalar boson which is lighter than a neutrino. We consider the appearance of neutrino bound states consisting of particles with oppositely directed spins. The gap equation for such a system is derived. Based on numerical simulations of the neutrino distribution in a cluster, we find the phase transition temperature and the coherence length inside such a cluster for various parameters of the system. The constraints on the parameters of the Yukawa interaction, resulting in the neutrino superfluidity, are derived. We obtain that the cosmic neutrino background can contribute to the superfluid condensate inside a neutrino cluster having realistic characteristics. The mechanism of the neutrino cluster cooling in the early universe, based on the plasmons Čerenkov radiation, is proposed.

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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.