Lowest vector tetraquark states: Y(4260/4220) or Z_c(4100)

2018/09/30 by Zhi-Gang Wang · 1 citation
Physics and Astronomy · #hep-ph

paper · pdf · doi:10.1140/epjc/s10052-018-6417-5

published as Eur. Phys. J. C78 (2018) 933 · 13 pages, 4 figures. arXiv admin note: text overlap with arXiv:1803.05749

arxiv created 2018/10/29 · arxiv updated 2018/11/16

Abstract

In this article, we take the Y(4260/4220) as the vector tetraquark state with J^PC=1^--, and construct the Cγ₅⊗\stackrel↔∂_μ⊗ γ₅C type diquark-antidiquark current to study its mass and pole residue with the QCD sum rules in details by taking into account the vacuum condensates up to dimension 10 in a consistent way. The predicted mass M_Y=4.24±0.10 \rmGeV is in excellent agreement with experimental data and supports assigning the Y(4260/4220) to be the Cγ₅⊗\stackrel↔∂_μ⊗ γ₅C type vector tetraquark state, and disfavors assigning the Z_c(4100) to be the Cγ₅⊗\stackrel↔∂_μ⊗ γ₅C type vector tetraquark state. It is the first time that the QCD sum rules have reproduced the mass of the Y(4260/4220) as a vector tetraquark state.

Citations

• Vector tetraquark state candidates: Y(4260/4220), Y(4360/4320), Y(4390) and Y(4660/4630)

Cited by

• Analysis of the vector tetraquark states with P-waves between the diquarks and antidiquarks via the QCD sum rules