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Identify the new state $Y(3872)$ as the P-wave $D\bar{D}^*/\bar{D}D^*$ resonance

Identify the new state $Y(3872)$ as the P-wave $D\bar{D}^*/\bar{D}D^*$ resonance

Authors :
Lin, Zi-Yang
Wang, Jun-Zhang
Cheng, Jian-Bo
Meng, Lu
Zhu, Shi-Lin
Lin, Zi-Yang
Wang, Jun-Zhang
Cheng, Jian-Bo
Meng, Lu
Zhu, Shi-Lin
Publication Year :
2024

Abstract

The BESIII Collaboration recently observed a new charmonium-like vector state $Y(3872)$ in $e^+e^-\rightarrow D\bar{D}$, which should be the first P-wave $D\bar{D}^*/\bar{D}D^*$ molecular resonance. The experimental and theoretical identification of the P-wave dimeson state holds paramount importance in enhancing our comprehension of the non-perturbative QCD and few-body physics. Its existence is firmly established in a unified meson-exchange model which simultaneously depicts the features of the $\chi_{c1}(3872)$, $Z_c(3900)$ and $T_{cc}(3875)$. This scenario can be directly examined in the $e^+e^-\rightarrow D\bar{D}^*/\bar{D}D^*$ cross section to see whether a resonance exists at the threshold. The credibility of the investigations is also ensured by the fact that the P-wave interaction dominantly arises from the well-known long-range pion exchange. Additionally, the existence of the P-wave resonance only depends on the interaction strength and is less sensitive to the potential shapes. We extensively calculate all systems up to P-wave with various quantum numbers and predict a dense population of the $D\bar{D}^*/\bar{D}D^*$ and $DD^*$ states, where the S-wave $D\bar{D}^*/\bar{D}D^*$ state with $I^G (J^{PC})=0^- (1^{+-})$, P-wave $D\bar{D}^*/\bar{D}D^*$ state with $I^G(J^{PC})=0^+(0^{-+})$, and P-wave $DD^*$ state with $I(J^P)=0(0^-)$ are more likely to be observed in experiments.<br />Comment: 9 pages, 7 figures

Details

Database :
OAIster
Publication Type :
Electronic Resource
Accession number :
edsoai.on1429620415
Document Type :
Electronic Resource