Meson Strings and Flavor Branes

Details Meson Strings and Flavor Branes Meson Strings and Flavor Branes

2006-02-22

arxiv.org/abs/hep-ph/0602203v2

Prog.Theor.Phys. 115 (2006) 1111-1127

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 6 figures, LaTeX;in ver3 note and references are added and English is improved

Scientific paper

10.1143/PTP.115.1111

In a QCD-like string model based on D6 flavor branes in the presence of D4 color branes wrapping one of the compactified dimension on an $S^1$, the shape of meson strings in the five dimensional curved space as well as the potential between quark and anti-quark are investigated. The flavor branes on which both ends of a meson string live are assumed to be separated in this five dimensional space, depending on the values of the constituent quark masses. It is shown in this picture that the meson string with different flavors on both ends changes its shape at a critical distance. There is, however, no critical distance for the meson with the same flavors. At this critical distance the potential between quark and anti-quark with different flavors gives a point of reflection and changes its shape around this point. Accordingly, the attractive force between quark and anti-quark seems to become stronger when the distance of flavor branes connecting meson strings becomes larger. This indicates quark systems with different flavors can form high-density states.

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