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arXiv 0901.4508hep-thhep-lathep-ph
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从超对称性看介子与重子Regge斜率的简并

Degeneracy Between the Regge Slope of Mesons and Baryons from Supersymmetry

Adi Armoni, Agostino Patella

摘要:

我们考虑了QCD中介子和重子的Regge斜率之间的简并度。我们认为,在“orientifold大N近似”的渐近质量介子和重子成为超对称的合作伙伴,因此退化。为此,我们将QCD推广到双指数反对称表象中夸克的SU(N)理论。我们证明了在这个框架中,介子由定向玻色子QCD弦表示,重子由非定向费米子QCD弦表示。在大N时,由于与超级杨-米尔斯的等价性,玻色子弦和费米子弦的张力重合。我们把介子和重子描述为有向和无向玻色子和费米子QCD弦,与对偶0'弦论中开弦的谱完全一致。

英文摘要:

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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