RARiS 研究会「実験、反応・構造計算、格子QCD で解き明かすハドロン分光 2024」

D¯Ξcc pentaquark as a partner of Tcc

Nov 21, 2024, 2:55 PM

20m

　三神峯ホール (東北大学先端量子ビーム科学研究センター)

Session1@Mikamine

Speaker

Yasuhiro Yamaguchi (Nagoya University)

Description

Recent accelerator experiments have reported unexpected states known as exotic hadrons, whose properties cannot be explained by the conventional picture. In the heavy quark sector, XYZ, Tcc and Pc have been reported since the discovery of X(3872). In this talk, we study $\overline{D}{\mathrm{\Xi }}_{cc}$ pentaquark as a partner of $T_{cc}$ recently observed by the LHCb experiment. $T_{cc}$ tetraquark is a candidate of the $D{D}^{\ast }$ molecule. By replacing a $D$ meson with a doubly charm baryon ${\mathrm{\Xi }}_{cc}$, being the superflavor partner of $D$, the existence of $\overline{D}{\mathrm{\Xi }}_{cc}$ molecule is expected. We also discuss the role of interactions in the formation of these bound states.