Regular Article - Theoretical Physics
Could Z c (4025) be a J P =1+ molecular state?
Department of Physics, School of Biomedical Engineering, Third Military Medical University, Chongqing, 400038, China
2 College of Science, National University of Defense Technology, Hunan, 410073, China
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Revised: 12 November 2013
Published online: 3 December 2013
We investigate whether the newly observed narrow resonance Z c (4025) can be described as a molecular state with quantum numbers J P =1+. Using QCD sum rules, we consider contributions up to dimension six in the operator product expansion and work at leading order of α s . The mass obtained for this state is (4.05±0.28) GeV. It is concluded that the molecular state is a possible candidate for Z c (4025).
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013