论文标题
2Favor Schwinger模型中的自动微调
Automatic Fine-Tuning in the 2-Flavor Schwinger Model
论文作者
论文摘要
我讨论了没有费米亚质量的2Fairaver Schwinger模型。我认为，在非距离算子的线性组合中，长距离理论的线性组合可以从长距离理论中消失，使其易于理解模型的某些令人困惑的特征，具有小的费米子质量。特别是，我认为，对于平均费米昂质量$ m_f $和质量差$Δm$，只要两者都很小与动力学量规玻色子质量$ m = e \ sqrt {2/π} $，在低能理论中，isospin breaking效果受到低能量理论的影响。 $ \ exp \ bigl（ - （m/m_f）^{2/3} \ bigr）$即使$Δm\ of m_f $！在低能理论中，这看起来像是指数的微调，但它是通过共形结合自动完成的。
I discuss the 2-flavor Schwinger model both without and with fermion masses. I argue that the concept of "conformal coalescence," in unparticle physics in which linear combinations of short distance operators can disappear from the long-distance theory, makes it easy to understand some puzzling features of the model with small fermion masses. In particular, I argue that for an average fermion mass $m_f$ and a mass difference $δm$, so long as both are small compared to the dynamical gauge boson mass $m=e\sqrt{2/π}$, isospin breaking effects in the low energy theory are exponentially suppressed by powers of $\exp\Bigl(-(m/m_f)^{2/3}\Bigr)$ even if $δm\approx m_f$! In the low energy theory, this looks like exponential fine-tuning, but it is done automatically by conformal coalescence.
