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Domain wall moduli in softly-broken SQCD at θˉ=π

机译:在θˉ=π的软破碎SQCD中的畴壁模量

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We analyze the moduli space dynamics of domain walls in S U ( N ) QCD at θ ˉ = π , by softly breaking N = 1 SQCD with sfermion mixing. In the supersymmetric limit, BPS domain walls between neighboring vacua are known to possess nontranslational flavor moduli that form a C P N ? 1 sigma model. For the simplest case with gauge group S U ( 2 ) and N f = 2 , we show that this sigma model also exhibits a Hopf term descending from the bulk Wess-Zumino term with a quantized coefficient. On soft-breaking of supersymmetry via sfermion mixing that preserves the flavor symmetry, these walls and their moduli-space dynamics survives when θ ˉ = π so that there are two degenerate vacua.
机译:我们通过用Sfermion混合软破坏N = 1 SQCD来分析S U(N)QCD在θˉ=π时畴壁的模空间动力学。在超对称极限中,已知相邻真空之间的BPS结构域壁具有形成C P N?的非翻译风味模量。 1 sigma模型。对于带有规格组S U(2)和N f = 2的最简单情况,我们表明,该sigma模型还显示了一个霍夫夫项,该霍夫项从具有量化系数的整体Wess-Zumino项降级。在通过保留气味对称性的二茂铁混合法使超对称性软破裂时,当θˉ=π时,这些壁及其模空间动力学得以幸存,因此存在两个简并的真空度。

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