Speaker
Shota Ampuku
(Nagoya university)
Description
In 2022, the LHCb Collaboration announced the discovery of the doubly charmed tetraquark T^+{cc} in the 𝐷^0𝐷^0\pi^+ line shape. Using a model that simultaneously handles both the 𝐷𝐷^∗ molecular state and the cc\bar{u}\bar{d} compact state, we analyzed the 𝐷^0𝐷^0\pi^+ line shape, and obtained the mass and decay width of T^+{cc} as the S-matrix pole. Furthermore, to examine the internal structure of T^+{cc}, we calculated the compositeness and found that T^+{cc} has a molecule-like structure.
