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- Title
Zcs, Zc and Zb states under the complex scaling method.
- Authors
Cheng, Jian-Bo; Huang, Bo-Lin; Lin, Zi-Yang; Zhu, Shi-Lin
- Abstract
We investigate the Z b , Z c and Z cs states within the chiral effective field theory framework and the S-wave single channel molecule picture. With the complex scaling method, we accurately solve the Schrödinger equation in momentum space. Our analysis reveals that the Z b (10610) , Z b (10650) , Z c (3900) and Z c (4020) states are the resonances composed of the S-wave (B B ¯ ∗ + B ∗ B ¯) / 2 , B ∗ B ¯ ∗ , (D D ¯ ∗ + D ∗ D ¯) / 2 and D ∗ D ¯ ∗ , respectively. Furthermore, although the Z cs (3985) and Z cs (4000) states exhibit a significant difference in width, these two resonances may originate from the same channel, the S-wave (D s D ¯ ∗ + D s ∗ D ¯) / 2 . Additionally, we find two resonances in the S-wave D s ∗ D ¯ ∗ channel, corresponding to the Z cs (4123) and Z cs (4220) states that await experimental confirmation.
- Subjects
MOMENTUM space; SCHRODINGER equation; SHEAR waves; SINGLE molecules; RESONANCE
- Publication
European Physical Journal C -- Particles & Fields, 2023, Vol 83, Issue 11, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-023-12199-y