On the smooth cross-over transition from the Delta-string to the Y-string three-quark potential

Details On the smooth cross-over transition from the Delta-string to the Y-string three-quark potential On the smooth cross-over transition from the Delta-string to the Y-string three-quark potential

2009-08-19

arxiv.org/abs/0908.2687v1

Phys.Rev.D80:054501,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 15 figures

Scientific paper

10.1103/PhysRevD.80.054501

We comment on the assertion made by Caselle et al., J. Stat. Mech. 0603, P008 (2006), that the confining (string) potential for three quarks "makes a smooth cross-over transition from the Delta-string to the Y-string configuration at interquark distances of around 0.8 fm". We study the functional dependence of the three-quark confining potentials due to a Y-string, and the Delta-string and show that they have different symmetries, which lead to different constants of the motion (i.e. they belong to different "universality classes" in the parlance of the theory of phase transitions). This means that there is no "smooth cross-over" between the two, when their string tensions are identical, except at the vanishing hyper-radius. We also comment on a certain two-body potential approximation to the Y-string potential.

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