Are Y(4260) and {\rm Z$_2^{+}$(4250)} ${\rm D_1D}$ or ${\rm D_0D^{*}}$ Hadronic Molecules?
| dc.creator | Ding, Gui-Jun | |
| dc.date | 2008-09-28 | |
| dc.date | 2008-11-28 | |
| dc.date.accessioned | 2026-07-07T12:30:22Z | |
| dc.date.available | 2026-07-07T12:30:22Z | |
| dc.description | In this work, we have investigated whether Y(4260) and ${\rm Z^{+}_2(4250)}$ could be ${\rm D_1D}$ or ${\rm D_0D^{*}}$ molecules in the framework of meson exchange model. The off-diagonal interaction induced by $π$ exchange plays a dominant role. The $σ$ exchange has been taken into account, which leads to diagonal interaction. The contribution of $σ$ exchange is not favorable to the formation of molecular state ${\rm with I^{G}(J^{PC})=0^{-}(1^{--})}$, however, it is beneficial to the binding of molecule ${\rm with I^{G}(J^{P})=1^{-}(1^{-})}$. Light vector meson exchange leads to diagonal interaction as well. For ${\rm Z^{+}_2(4250)}$, the contribution from $ρ$ and $ω$ exchange almost cancels each other. For the currently allowed values of the effective coupling constants and a reasonable cutoff $Λ$ in the range 1-2 GeV, We find that Y(4260) could be accommodated as a ${\rm D_1D}$ and ${\rm D_0D^{*}}$ molecule, whereas the interpretation of ${\rm Z^{+}_2(4250)}$ as a ${\rm D_1D}$ or ${\rm D_0D^{*}}$ molecule is disfavored. The bottom analog of Y(4260) and ${\rm Z^{+}_2(4250)}$ may exist, and the most promising channels to discovery them are $π^{+}π^{-}Υ$ and $π^{+}χ_{b1}$ respectively. | |
| dc.description | 21 pages, 3 figures and 7 tables | |
| dc.identifier | https://arxiv.org/abs/0809.4818 | |
| dc.identifier | http://arxiv.org/abs/0809.4818 | |
| dc.identifier | Phys.Rev.D79:014001,2009 | |
| dc.identifier | doi:10.1103/PhysRevD.79.014001 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/216111 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Are Y(4260) and {\rm Z$_2^{+}$(4250)} ${\rm D_1D}$ or ${\rm D_0D^{*}}$ Hadronic Molecules? | |
| dc.type | text |