2008/03/31 by Xiang Liu, Yan-Rui Liu, Wei-Zhen Deng +1 · 1 citation
Physics and Astronomy · #Advanced Chemical Physics Studies #Atomic and Subatomic Physics Research #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevd.77.094015
published as Phys.Rev.D77:094015,2008 · 13 pages, 7 tables, 7 figures
openalex publication_date 2008/05/20 · arxiv created 2008/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We reexamine whether Z+(4430) could be a D1^\ensuremath'\ensuremath-D* or D1\ensuremath-D* molecular state after considering both the pion and \ensuremathσ 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 D1^\ensuremath'\ensuremath-D* system and significant for the D1\ensuremath-D* system. The S-wave D1\ensuremath-D* molecular state with only JP=0^\ensuremath- and D1^\ensuremath'\ensuremath-D* molecular states with JP=0^\ensuremath-,1^\ensuremath-,2^\ensuremath- may exist with reasonable parameters. One should investigate whether the broad width of D1^\ensuremath' disfavors the possible formation of molecular states in the future. The bottom analog ZB 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.