论文标题
隐藏手性尺度对称的多种作用：nuclei中的“ quenching” $ {g_a} $
Multifarious roles of hidden chiral-scale symmetry:"Quenching" ${g_A}$ in nuclei
论文作者
论文摘要
我讨论了在手性匹配尺度上定义的轴向电流耦合常数$ g_a $如何在核中有和没有中子的核心元素衰减的轴向电流矩阵元素对轴向电流矩阵元素的影响。在核物理学中长期存在的难题中观察到的“淬灭” $ g_a $被证明可以编码隐藏在真空中QCD中的手性尺度对称性的出现。这使人们能够探索痕量 - 反式诱导的比例对称性破坏如何进入重新归一化的$ g_a $ nuclei，适用于适用于某些参与中微子双β衰减的某些非唯一的禁止过程。手性尺度对称性在高度致密培养基中的$ g_a $中的角色与在大型紧凑型星体中的EOS中的强子Quark连续性中的角色之间达到了平行。目前缺乏核理论，对未来进步至关重要的系统性手性尺度EFT被认为是该领域的挑战。
I discuss how the axial current coupling constant $g_A$ renormalized in scale symmetric chiral EFT defined at a chiral matching scale impacts on the axial current matrix elements on beta decays in nuclei with and without neutrinos. The "quenched" $g_A$ observed in nuclear superallowed Gamow-Teller transitions, a long-standing puzzle in nuclear physics, is shown to encode the emergence of chiral-scale symmetry hidden in QCD in the vacuum. This enables one to explore how trace-anomaly-induced scale symmetry breaking enters in the renormalized $g_A$ in nuclei applicable to certain non-unique forbidden processes involved in neutrinoless double beta decays. A parallel is made between the roles of chiral-scale symmetry in quenching $g_A$ in highly dense medium and in hadron-quark continuity in the EoS of dense matter in massive compact stars. A systematic chiral-scale EFT, presently lacking in nuclear theory and potentially crucial for the future progress, is suggested as a challenge in the field.
