期刊
MODERN PHYSICS LETTERS A
卷 35, 期 18, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217732320501515
关键词
Pentaquark; hidden charm; hadrocharmonium
资金
- NSF [PHY-1724638]
- BMBF [05P2018]
New LHCb Collaboration results on pentaquarks with hidden charm(1) are discussed. These results fit nicely in the hadrocharmonium pentaquark scenario.(2,3) In the new data the old LHCb pentaquark P-c(4450) splits into two states P-c(4440) and P-c(4457). We interpret these two almost degenerated hadrocharmonium states with J(P) = 1/2(-) and J(P) = 3/2(-), as a result of hyperfine splitting between hadrocharmonium states predicted in Ref. 2. It arises due to QCD multipole interaction between color-singlet hadrocharmonium constituents. We improve the theoretical estimate of hyperfine splitting(2,3) that is compatible with the experimental data. The new P-c(4312) state finds a natural explanation as a bound state of chi(c0) and a nucleon, with I = 1/2, J(P) = 1/2(+) and binding energy 42 MeV. As a bound state of a spin-0 meson and a nucleon, hadrocharmonium pentaquark P-c(4312) does not experience hyperfine splitting. We find a series of hadrocharmonium states in the vicinity of the wide P-c(4380) pentaquark that can explain its apparently large decay width.We compare the hadrocharmonium and molecular pentaquark scenarios and discuss their relative advantages and drawbacks.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据