Exotic B_c-like molecules in QCD Sum Rules

Abstract

We use the QCD sum rules to study possible $B_c$-like molecular states. We consider isoscalar $J^P=0^{+}$ and $J^P=1^{+}{D}^{(\ast )}{B}^{(\ast )}$ molecular currents. We consider the contributions of condensates up to dimension eight and we work at leading order in ${\alpha }_s$ . We obtain for these states masses around 7 GeV.

Comments: 7 pages, 6 figures. Accepted for publication in Physics Letters B. arXiv admin note: text overlap with arXiv:1110.2113