Fluctuations of the baryonic flux-tube junction from effective string theory

Details Fluctuations of the baryonic flux-tube junction from effective string theory Fluctuations of the baryonic flux-tube junction from effective string theory

2008-10-09

arxiv.org/abs/0810.1649v2

Phys.Rev.D79:025022,2009

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, 2 figures, RevTeX4 style, revision: style changed, references added, more explanations added, typos corrected

Scientific paper

10.1103/PhysRevD.79.025022

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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