南安普顿大学与印度理工学院坎布尔分校的研究人员近期发表一项新理论，指出一种长期被忽视的“解耦”重中微子可能解释了为何宇宙中存在物质而非反物质 1。相关研究已发表在《物理评论快报》上，报道日期为2026年11月1日 1。该理论认为，这种寿命极长的粒子曾在宇宙大爆炸后短暂主导了能量密度 1。
这一过程改变了早期宇宙的演化条件，通过希格斯玻色子影响基本粒子与反粒子的相互作用温度，从而建立了物质-反物质的不对称性 1。研究人员 Rishav Roshan 博士表示：“这种解耦的重中微子在粒子物理学中长期被视为无关的背景细节……但它暂时接管了宇宙的能量密度，并触发了一个物质主导时期。” 1 此外，该理论预测这一机制可能在原初引力波中留下可探测的特征印记，为未来的验证提供了途径 1。
Researchers from the University of Southampton and the Indian Institute of Technology Kanpur have proposed that a long-neglected particle, known as a decoupled heavy neutrino, may explain why the universe exists in its current state 1. The study suggests that this extremely long-lived particle temporarily dominated the energy density of the cosmos shortly after the Big Bang 1. This process altered the evolution conditions of the early universe, leading to an excess of matter over antimatter 1. The findings were published in Physical Review Letters on November 1, 2026 1.
According to the theory, the decoupled heavy neutrino influenced the interaction temperature between fundamental particles and antiparticles via the Higgs boson 1. This mechanism established the necessary matter-antimatter asymmetry 1. Dr. Rishav Roshan stated, "This decoupled heavy neutrino has long been dismissed as an irrelevant background detail in particle physics... it temporarily took over the energy density of the universe and triggered a matter-dominated period" 1. The researchers also noted that this event may have left detectable signatures in primordial gravitational waves 1.
评论
还没有评论，欢迎留下第一条。