Flavor-singlet spectrum in multi-flavor QCD
Flavor-singlet spectrum in multi-flavor QCD
复制标题
多风味 QCD 中的风味单线谱
DOI：
10.1051/epjconf/201817508023
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发表时间：
2018
影响因子：
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通讯作者：
Yamazaki Takeshi
中科院分区：
文献类型：
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作者：
Aoki Yasumichi;Aoyama Tatsumi;Bennett Ed;Kurachi Masafumi;Maskawa Toshihide;Miura Kohtaroh;Nagai Kei-ichi;Ohki Hiroshi;Rinaldi Enrico;Shibata Akihiro;Yamawaki Koichi;Yamazaki Takeshi
随着轻费米子数量的增加，研究SU（3）规范理论对于理解QCD的强动力学和构建标准模型的强相互作用扩展（例如复合希格斯模型的UV完成）都是相关的。为了将这些多味强相互作用理论与QCD进行对比，我们研究了味单重态谱作为一个有趣的探针。事实上，一些复合希格斯玻色子模型要求希格斯玻色子是一个强相互作用的新扇区的光谱中最轻的味道单重标量，与其他状态有明确的层次结构。此外，在固定数量的颜色中引入许多轻味道会影响最轻味道单重赝标的动力学。我们提出了正在进行的研究，这些味道单通道使用多个插值算子的高统计合奏产生的LatKMI合作，我们比较结果与现有的数据得到的晶格强动力学合作。对于具有8种口味的理论，这两个合作已经产生了相互补充的配置，目的是使用最大可能的体积来解决无质量限制。
Studying SU(3) gauge theories with increasing number of light fermions is relevant both for understanding the strong dynamics of QCD and for constructing strongly interacting extensions of the Standard Model (e.g. UV completions of composite Higgs models). In order to contrast these many-flavors strongly interacting theories with QCD, we study the flavor-singlet spectrum as an interesting probe. In fact, some composite Higgs models require the Higgs boson to be the lightest flavor-singlet scalar in the spectrum of a strongly interacting new sector with a well defined hierarchy with the rest of the states. Moreover, introducing many light flavors at fixed number of colors can influence the dynamics of the lightest flavor-singlet pseudoscalar. We present the on-going study of these flavor-singlet channels using multiple interpolating operators on high-statistics ensembles generated by the LatKMI collaboration and we compare results with available data obtained by the Lattice Strong Dynamics collaboration. For the theory with 8 flavors, the two collaborations have generated configurations that complement each others with the aim to tackle the massless limit using the largest possible volumes.