Systematic study of dense $\bar{K}$ nuclei with a revised $\bar{K}N$ potential

Due to the strongly attractive $\bar{K}N$ interaction, a $K^-$ meson can be deeply bound in nuclei. So far, we have investigated $\bar{K}$ nuclei with a phenomenological $\bar{K}N$ interaction. According to my study with the method of antisymmetrized molecular dynamics, we have found that a $K^-$ meson can be bound by about 100 MeV below nucleus-K threshold in various light nuclei and makes nuclei drastically shrunk. $\bar{K}$ nuclei are very dense (over 4 times normal density) and have so interesting structures that we have never seen in usual nuclei. Recently, a few experimental groups have discovered $\bar{K}$ nuclei; $ppnK^-$ and $pnnK^-$ by Iwasaki $et$ $al$ and $ppK^-$ by Nagae $et$ $al$. According to these results, $\bar{K}$ nuclei are more deeply bound than our prediction. Taking them into account, $\bar{K}N$ potential should be somewhat enhanced than original one in case of my calculation. In addition, Nucleon-Nucleon $LS$ interaction is found to give large contribution by the study of $pnnK^-$ which seems to have $(0s)^2(0p)$ nucleon configuration. Taking these points into consideration, we have confirmed that binding energies of various $\bar{K}$ nuclei increase to about 200 MeV measured from nucleus-K threshold. We expect that their structures should change more drastically. Moreover, we have interests in double $\bar{K}$ nuclei, which have two $K^-$ mesons. They are expected to be so deeply bound. I will report on these issues. If possible, I'd like to mention other types of interaction and analysis from the viewpoint of quarks.