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

Abstract

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

8 pages, 7 figures, 1 table

References in corpus (6)

• New Charmonium States in QCD Sum Rules: a Concise Review
• Stable multiquark states with heavy quarks in a diquark model
• Mass-splittings of doubly heavy baryons in QCD
• New structure around 3250 MeV in the baryonic B decay and the $D_0^{\ast }(2400)N$ molecular hadron
• Study of the baryonic B decay B- -> SigmaC++ p- pi- pi-
• Study of $X_c(3250)$ as a $D_0^{\ast }(2400)N$ molecular state

Cited by in corpus (7)

• Possible pentaquark candidates: new excited ${\Omega }_c$ states
• The singly-charmed pentaquark molecular states via the QCD sum rules
• Unraveling the pattern of the $XYZ$ mesons
• A study of the $KN$-$K^{\ast }N$ coupled systems
• Multiquark contributions to charm baryon spectroscopy
• Hadronic resonances enhanced by thresholds
• On the Origin of the $XYZ$ Mesons