论文标题
强大的CP违反：问题还是祝福？
Strong CP violation: problem or blessing?
论文作者
论文摘要
我们在标准模型和最小的左右对称模型中读取了强烈的CP违规问题，并试图清除似乎仍然遍及该领域的混乱。我们认为，在LR对称性的背景下，强大的CP违规行为的较小，尽管无害并基本上与SM的其余物理学脱钩，从而通过帮助缩小理论的参数空间并连接显然是无关的物理量来为祝福提供了祝福。特别是，在左右对称性是奇偶校验的背景下，它要么指出以前注意到的抑制了麻痹性CP违规行为，要么导致相对较轻的右手中微子，这可能在下一个强子对撞机上可以访问。鉴于复杂的Yukawa耦合，后者更自然，与违反Lepton风味的较小性并驾齐驱，并增强了观察中微子双β衰变的可能性。
We readdress the issue of strong CP violation both in the Standard Model and in the Minimal Left-Right Symmetric Model and try to clear the confusion that seems to still pervade the field. We argue that the smallness of strong CP violation, while harmless and basically decoupled from the rest of physics in the SM, in the context of LR symmetry provides a blessing by helping to narrow down the parameter space of the theory and connecting apparently uncorrelated physical quantities. In particular, in the context of left-right symmetry being parity, it either points to the suppression of leptonic CP violation noticed before, or it leads to relatively light right-handed neutrinos, potentially accessible at the next hadron collider. The latter, more natural in view of complex quark Yukawa couplings, goes hand in hand with the smallness of lepton flavor violation and enhances the possibility of observing neutrinoless double beta decay.
