论文标题
QCD轴的夸克风味现象学
Quark Flavor Phenomenology of the QCD Axion
论文作者
论文摘要
具有生成依赖性Peccei-Quinn电荷的轴轴模型会导致变化的中性电流，从而在精确的风味实验中激励QCD轴突搜索。我们严格地从当前测量值中限制了最一般的有效风味侵略耦合，并评估其发现潜力。对于两体衰变，我们使用可用的实验数据来得出所有风味过渡的$ q \ q'$衰减率的限制。使用手性扰动理论和操作员产品扩展以系统的方式计算中性渗透混合的轴突贡献。我们还详细讨论了男性衰变和三体介子衰变，这可以为某些耦合提供最佳的搜索策略。例如，$λ\ to n a $过渡的强大限制可以源自Supernova SN 1987a。在不久的将来，在正在进行的实验中为$ q \ q'q'的专门搜索可能会测试Na62或koto的Peccei-Quinn Breaking缩放量表，最高可达$ 10^{12} $ GEV，最高可达$ 10^{9} $ GEV $ GEV $ GEV在Belle II或BES III或BES III或BES III。
Axion models with generation-dependent Peccei-Quinn charges can lead to flavor-changing neutral currents, thus motivating QCD axion searches at precision flavor experiments. We rigorously derive limits on the most general effective flavor-violating couplings from current measurements and assess their discovery potential. For two-body decays we use available experimental data to derive limits on $q\to q' a$ decay rates for all flavor transitions. Axion contributions to neutral-meson mixing are calculated in a systematic way using chiral perturbation theory and operator product expansion. We also discuss in detail baryonic decays and three-body meson decays, which can lead to the best search strategies for some of the couplings. For instance, a strong limit on the $Λ\to n a$ transition can be derived from the supernova SN 1987A. In the near future, dedicated searches for $q\to q' a$ decays at ongoing experiments could potentially test Peccei-Quinn breaking scales up to $10^{12}$ GeV at NA62 or KOTO, and up to $10^{9}$ GeV at Belle II or BES III.
