New Experimental Results on Exotic XYZ States
Tóm tắt
We review the experimental progress on the study of the quarkoniumlike states, also known as XYZ states. We give a general review and then focus on the new experimental results on the
$$X(3872)$$
, the
$$Y(4260)$$
, and
$$Y(4660)$$
, and the charged charmoniumlike
$$Z_{c}$$
and
$$Z_{cs}$$
states. The observations suggest that we did observe hadronic molecules and we also observed hadronic states with some other quark configurations.
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