论文标题
大N QCD中的手性对称性破坏和夸克双线性冷凝物
Chiral Symmetry Breaking and Quark Bilinear Condensate in Large N QCD
论文作者
论文摘要
我们讨论自发的手性对称性破坏和夸克双线性冷凝物中的$ N_C $ QCD。众所周知，Witten和Veneziano指出的是，在大的$ N_C $ QCD中暗示的$η'$ Meson的存在。首先，我们表明$η'$和Ward-takahashi身份的存在意味着来自手性对称破坏$ su（n_f）_l \ times su（n_f）su（n_f）_r \ su（n_f）su（n_f）su（n_f）_v $的nambu-goldstone玻色子的存在。其次，我们表明QCD不等式意味着夸克双线性冷凝物上的非零下限。
We discuss spontaneous chiral symmetry breaking and quark bilinear condensate in large $N_c$ QCD. It has been known that the existence of $η'$ meson is implied in large $N_c$ QCD as pointed out by Witten and Veneziano. First, we show that the existence of $η'$ and Ward-Takahashi identities imply the existence of the Nambu-Goldstone bosons from chiral symmetry breaking $SU(N_f)_L \times SU(N_f)_R \to SU(N_f)_V$. Second, we show that a QCD inequality implies a nonzero lower bound on the quark bilinear condensate.
