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A hidden-charm pentaquark state in decay
En Wang, Hua-Xing Chen, Li-Sheng Geng +2
We study here the reaction in analogy to the one, and we note that in both decays there is a sharp structure (dip or peak) in the m…
QCD sum rule calculation for P-wave bottom baryons
Qiang Mao, Hua-Xing Chen, Wei Chen +3
We study the P-wave bottom baryons using the method of QCD sum rule and heavy quark effective theory. Our results suggest that Lambda_b(5912) and Lambda_b(5920) can be well describ…
Y(4260) --> gamma + X(3872) in the diquarkonium picture
H. -X. Chen, L. Maiani, A. D. Polosa +1
The observed Y(4260)\to γ+ X(3872) decay is a natural consequence of the diquark-antidiquark description of Y and X resonances. In this note we attempt an estimate of the transitio…
Looking for a hidden-charm pentaquark state with strangeness from decay into
Hua-Xing Chen, Li-Sheng Geng, Wei-Hong Liang +3
Assuming that the recently observed hidden-charm pentaquark state, , is of molecular nature as predicted in the unitary approach, we propose to study the decay of $Ξ^-_b…
Towards exotic hidden-charm pentaquarks in QCD
Hua-Xing Chen, Wei Chen, Xiang Liu +2
Inspired by and recently observed by LHCb, a QCD sum rule investigation is performed, by which they can be identified as exotic hidden-charm pentaquarks com…
F-wave heavy-light meson spectroscopy in QCD sum rules and heavy quark effective theory
Dan Zhou, Hua-Xing Chen, Li-Sheng Geng +2
We study the F-wave c_bar s heavy meson doublets (2+,3+) and (3+,4+). They have large orbital excitations L=3, and may be good challenges (tests) for theoretical studies. To study…