Xiang Liu

TL;DR: In this paper, the color-magnetic interaction was used to estimate the masses of the partner states of the tetraquark X(5568) and discussed their decay pattern, which provides valuable information on the future search of these states.

TL;DR: In this article, the hidden-charm and charm-strange molecular pentaquark systems composed of a heavy baryon (Sigma(c), Sigma(c)*) and a vector meson ((K) over bar*, (D) over bars), where the S-D mixing effect is considered in the calculation, were studied.

TL;DR: In this paper, the authors systematically constructed all the relevant local hidden-charm pentaquark currents, and select some of them to perform QCD sum rule analyses, and they found that the most common currents are composed of an anti-charmed meson and a charmed baryon.

TL;DR: In this paper, the mass spectrum analysis and the strong decay calculation were used to predict the existence of $1P$ and $2S$ partners of the bottom baryons, where their masses and decay behaviors were presented.

Abstract: We reexamine whether Z(+)(4430) could be a D(1)'-D* or D(1)-D* molecular state after considering both the pion and sigma meson exchange potentials and introducing the form factor to take into account the structure effect of the interaction vertex. Our numerical analysis with Matlab package MATSLISE indicates the contribution from the sigma meson exchange is small for the D(1)'-D* system and significant for the D(1)-D* system. The S-wave D(1)-(D) over bar* molecular state with only J(P)=0(-) and D(1)'-D* molecular states with J(P)=0(-),1(-),2(-) may exist with reasonable parameters. One should investigate whether the broad width of D(1)' disfavors the possible formation of molecular states in the future. The bottom analog Z(B) of Z(+)(4430) has a larger binding energy, which may be searched at Tevatron and LHC. Experimental measurement of the quantum number of Z(+)(4430) may help uncover its underlying structure.