Abstract
We investigate properties of the new scalar resonances and , which were recently reported by the LHCb collaboration. These states were observed as resonant structures in and invariant mass distributions in B + meson decays. We argue that and may be modeled as molecules and of conventional vector mesons, respectively. The mass m and current coupling f of the molecule are calculated using a two-point sum rule method. The sum rule analysis is performed by taking into account vacuum condensates up to dimension 8. The obtained result for the mass, m = (2917 ± 135) MeV, permits us to consider the molecule as one of the possible models of the resonance . Because the second structure is isospin partner of the doubly charged state, it should have a mass close to m.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
