Axion quality from superconformal dynamics
Axion quality from superconformal dynamics
复制标题
超共形动力学的轴子质量
DOI：
10.1016/j.physletb.2021.136239
复制
发表时间：
2021
影响因子：
4.4
通讯作者：
Motoo Suzuki
中科院分区：
文献类型：
--
作者：
Y. Nakai;Motoo Suzuki
我们讨论了超共形动力学诱导整体U（1）PQ对称性的出现以通过轴子解决强CP问题的可能性。自发破缺U（1）PQ对称性的场耦合到普通色SU（3）C下带电的新夸克和新SU（N）规范群。该理论流到IR不动点，其中U（1）PQ破缺场保持大的反常维数，导致抑制U（1）PQ破坏的高维算子。U（1）PQ的自发破缺使新夸克具有质量。U（1）PQ对称性在SU（3）C下是反常的，但在SU（N）下不是，因此轴子只与色SU（3）C耦合，并产生通常的轴子势。我们还评论了在新的超对称QCD中U（1）PQ破缺场被实现为介子超场的模型。
We discuss a possibility that a superconformal dynamics induces the emergence of a global U (1) PQ symmetry to solve the strong CP problem through the axion. Fields spontaneously breaking the U (1) PQ symmetry couple to new quarks charged under the ordinary color S U (3) C and a new S U (N) gauge group. The theory flows into an IR fixed point where the U (1) PQ breaking fields hold a large anomalous dimension leading to the suppression of U (1) PQ-violating higher dimensional operators. The spontaneous breaking of the U (1) PQ makes the new quarks massive. The U (1) PQ symmetry is anomalous under the S U (3) C but not under the S U (N) so that the axion couples to only the color S U (3) C and the usual axion potential is generated. We also comment on a model that the U (1) PQ breaking fields are realized as meson superfields in a new supersymmetric QCD.