非对称四夸克态在最小路径线性势中的稳定性
Stability of asymmetric tetraquarks in the minimal-path linear potential
摘要:
介子中夸克和反夸克的线性结合势被推广到重子和多夸克组态,作为中和颜色的通量管的最小长度,以弦张力为单位。对于四夸克系统,即,两个夸克和两个反夸克,这涉及到两种可能的夸克--反夸克配对,以及连接夸克和反夸克的斯坦纳树。这个势的一个新的不等式严格地证明了在这个模型中,四夸克态在大的夸克与反夸克质量比的极限下是稳定的。
英文摘要:
The linear potential binding a quark and an antiquark in mesons is generalized to baryons and multiquark configurations as the minimal length of flux tubes neutralizing the color, in units of the string tension. For tetraquark systems, i.e., two quarks and two antiquarks, this involves the two possible quark--antiquark pairings, and the Steiner tree linking the quarks to the antiquarks. A novel inequality for this potential demonstrates rigorously that within this model the tetraquark is stable in the limit of large quark-to-antiquark mass ratio.
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