Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-08-05
Nucl.Phys.A815:29-39,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
revised version accepted for publication in Nucl. Phys. A
Scientific paper
10.1016/j.nuclphysa.2008.10.012
We use QCD sum rules to study the recently observed resonance-like structures in the $\pi^+\chi_{c1}$ 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 $\alpha_s$. 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.
Lee Su Houng
Morita Kenji
Nielsen Marina
No associations
LandOfFree
Can the $π^+χ_{c1}$ resonance structures be $D^*\bar{D}^*$ and $D_1\bar{D}$ molecules? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Can the $π^+χ_{c1}$ resonance structures be $D^*\bar{D}^*$ and $D_1\bar{D}$ molecules?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Can the $π^+χ_{c1}$ resonance structures be $D^*\bar{D}^*$ and $D_1\bar{D}$ molecules? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-550653