Can the $π^+χ_{c1}$ resonance structures be $D^*\bar{D}^*$ and $D_1\bar{D}$ molecules?
| dc.creator | Lee, Su Houng | |
| dc.creator | Morita, Kenji | |
| dc.creator | Nielsen, Marina | |
| dc.date | 2008-08-05 | |
| dc.date | 2008-10-22 | |
| dc.date.accessioned | 2026-07-07T12:15:10Z | |
| dc.date.available | 2026-07-07T12:15:10Z | |
| dc.description | We use QCD sum rules to study the recently observed resonance-like structures in the $π^+χ_{c1}$ mass distribution, $Z_1^+(4050)$ and $Z_2^+(4250)$, considered as $D^{*+}\bar{D}^{*0}$ and $D_1^+\bar{D}^0+ D^+\bar{D}_1^0$ molecules with the quantum number $J^P=0^+$ and $J^P=1^-$ respectively. We consider the contributions of condensates up to dimension eight and work at leading order in $α_s$. We obtain $m_{D^*D^*}=(4.15\pm0.12) \GeV$, around 100 MeV above the $D^*D^*$ threshold, and $m_{D_1D}=(4.19\pm 0.22) \GeV$, around 100 MeV below the $D_1D$ threshold. We conclude that the $D^{*+}\bar{D}^{*0}$ state is probably a virtual state that is not related with the $Z_1^+(4050)$ resonance-like structure. In the case of the $D_1D$ molecular state, considering the errors, its mass is consistent with both $Z_1^+(4050)$ and $Z_2^+(4250)$ resonance-like structures. Therefore, we conclude that no definite conclusion can be drawn for this state from the present analysis. | |
| dc.description | revised version accepted for publication in Nucl. Phys. A | |
| dc.identifier | https://arxiv.org/abs/0808.0690 | |
| dc.identifier | http://arxiv.org/abs/0808.0690 | |
| dc.identifier | Nucl.Phys.A815:29-39,2009 | |
| dc.identifier | doi:10.1016/j.nuclphysa.2008.10.012 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/211427 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Can the $π^+χ_{c1}$ resonance structures be $D^*\bar{D}^*$ and $D_1\bar{D}$ molecules? | |
| dc.type | text |