Degeneracy Between the Regge Slope of Mesons and Baryons from Supersymmetry

Details Degeneracy Between the Regge Slope of Mesons and Baryons from Supersymmetry Degeneracy Between the Regge Slope of Mesons and Baryons from Supersymmetry

2009-01-28

arxiv.org/abs/0901.4508v2

JHEP 0907:073,2009

Physics

High Energy Physics

High Energy Physics - Theory

v2: extended version. Appendices and references added

Scientific paper

10.1088/1126-6708/2009/07/073

We consider the degeneracy between the Regge slope of mesons and baryons in QCD. We argue that within the "orientifold large-N approximation" asymptotically massive mesons and baryons become supersymmetric partners and hence degenerate. To this end, we generalize QCD by a SU(N) theory with a quark in the two-index antisymmetric representation. We show that in this framework the meson is represented by an oriented bosonic QCD-string and the baryon is represented by an un-oriented fermionic QCD-string. At large-N, due to an equivalence with super Yang-Mills, the tensions of the bosonic and the fermionic strings coincide. Our description of mesons and baryons as oriented and un-oriented bosonic and fermionic QCD-strings is in full agreement with the spectra of open strings in the dual type 0' string theory.

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