English

$Z^+(4430)$ as a resonance in the $D_1(D_1^\prime)D^*$ channel

High Energy Physics - Phenomenology 2007-08-31 v1

Abstract

We study the possibility that the Z+(4430)Z^+(4430) state observed by Belle is a D1DD_1D^* (or D1DD_1'D^*) resonance in S-wave. Focusing on its decays, We find that the open-charm decay into DDπD^*D^*\pi is dominant. Furthermore, we use the re-scattering mechanism to study its hidden-charm decays and find that the re-scattering effects are significant in D1DD_1D^* channel but not in D1DD_1'D^* channel. For the JP=1J^P=1^- candidate, with chosen parameters, we can get Γ(Z+ψπ+)/Γ(Z+J/ψπ+)5.3\Gamma(Z^+\to\psi'\pi^+)/\Gamma(Z^+\to J/\psi\pi^+)\thickapprox 5.3, which tends to account for why the Z+(4430)Z^+(4430) is difficult to be found in J/ψπ+J/\psi\pi^+. However, the 00^- candidate can not be ruled out by our calculations.

Keywords

Cite

@article{arxiv.0708.4222,
  title  = {$Z^+(4430)$ as a resonance in the $D_1(D_1^\prime)D^*$ channel},
  author = {Ce Meng and Kuang-Ta Chao},
  journal= {arXiv preprint arXiv:0708.4222},
  year   = {2007}
}

Comments

5 pages, 2 figures