1306.4182 (R. M. Albuquerque et al.)

QCD Sum Rule Study for a Possible Charmed Pentaquark Θc(3250)    [PDF]

R. M. Albuquerque, S. H. Lee, M. Nielsen

We use QCD sum rules to study the possible existence of a \Theta c(3250) charmed pentaquark. We consider the contributions of condensates up to dimension-10 and work at leading order in \alpha_s. We obtain m(\Theta c) = (3.21 +/- 0.13) GeV, compatible with the mass of the structure seen by BaBar Collaboration in the decay channel B- -> p- \Sigma c++ pi- pi-. The proposed state is compatible with a previous proposed pentaquark state in the anti-charmed sector.

View original: http://arxiv.org/abs/1306.4182