用有效弦论研究重子通量管结的涨落
Fluctuations of the baryonic flux-tube junction from effective string theory
摘要：
在猝灭QCD中，夸克-反夸克对在真空中的动态产生被忽略，由三个静态夸克组成的受限重子系统在大的夸克间分离下表现出弦状行为，形成的通量管的特征是所谓的Y形。我们研究的三个通量管的交界处的波动，假设的动态是由一个有效的玻色弦模型。我们表明，接头的有效宽度的渐近行为的增长与源之间的距离，与系数取决于连接字符串的数量，上的时空的尺寸和上的字符串的张力。
英文摘要：
In quenched QCD, where the dynamic creation of quark-antiquark pairs out of the vacuum is neglected, a confined baryonic system composed of three static quarks exhibits string-like behaviour at large interquark separation, with the formation of flux tubes characterized by the geometry of the so-called Y ansatz. We study the fluctuations of the junction of the three flux tubes, assuming the dynamics to be governed by an effective bosonic string model. We show that the asymptotic behaviour of the effective width of the junction grows logarithmically with the distance between the sources, with the coefficient depending on the number of joining strings, on the dimension of spacetime and on the string tension.
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