Dark nuclei. II. Nuclear spectroscopy in two-color QCD
Dark nuclei. II. Nuclear spectroscopy in two-color QCD
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暗核。
DOI：
10.1103/physrevd.90.114506
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发表时间：
2014
影响因子：
5
通讯作者：
A. Pochinsky
中科院分区：
文献类型：
--
作者：
W. Detmold;M. McCullough;A. Pochinsky
我们考虑了两种夸克的双色QCD作为复合暗物质的可能理论，并利用晶格场理论方法研究了自旋J=0和J=1多重子扇区的核谱。我们发现了令人信服的证据，证明重子数为$B=2,3$的$J=1$系统（以及它们的混合介子-重子对应物）是束缚态——该理论中原子核的类似物。此外，我们估计了$J=0$和$J=1$单重子态的$\sigma$-项，这对于理论与可能介导与可见部分相互作用的标量电流的耦合是重要的。
We consider two-colour QCD with two flavours of quarks as a possible theory of composite dark matter and use lattice field theory methods to investigate nuclear spectroscopy in the spin $J=0$ and $J=1$ multi-baryon sectors. We find compelling evidence that $J=1$ systems with baryon number $B=2,3$ (and their mixed meson-baryon counterparts) are bound states - the analogues of nuclei in this theory. In addition, we estimate the $\sigma$-terms of the $J=0$ and $J=1$ single baryon states which are important for the coupling of the theory to scalar currents that may mediate interactions with the visible sector.