in the hybrid model of charmonium and hadronic molecule

Yamaguchi, Yasuhiro ; Takeuchi, Sachiko*; Takizawa, Makoto*; Hosaka, Atsushi

has been known as a candidate of the exotic hadron, while the nature has not been understood yet. The mass spectrum of , near the $D^0bar{D}^{ast 0}$ threshold, indicates the $D^0bar{D}^{ast 0}$ composite structure, so called a hadronic molecule. On the other hand, measurements of the production ratio prefer the compact structure. To understand the nature of , we employ the hybrid model with the charmonium and hadronic molecular components, and study a mass spectrum and decay properties. The model reasonably reproduces the spectrum, where the $cbar{c}-D^0bar{D}^{ast 0}$ coupling plays an important role. We also introduce the and molecular components and find that the finite width of and is important to explain the pole position appearing above the $D^0bar{D}^{ast 0}$ threshold.

Language	:	English
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Meeting title	:	Experimental and theoretical status of and perspectives for XYZ states
Held date	:	2021/04
Location (city)	:	online
Location (country)	:	Germany
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Keywords	:	no keyword
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Registration No. : BB20210017
JAEA Abstracts No. :
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