Mixing angle of doubly heavy baryons in QCD

ALIYEV T., AZİZİ K., SAVCI M.

PHYSICS LETTERS B, vol.715, pp.149-151, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 715
  • Publication Date: 2012
  • Doi Number: 10.1016/j.physletb.2012.07.033
  • Journal Name: PHYSICS LETTERS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.149-151
  • Middle East Technical University Affiliated: Yes

Abstract

We calculate the mixing angles between the spin-1/2, Xi(bc)-Xi'(bc) and Omega(bc)-Omega'(bc) states of doubly heavy baryons within the QCD sum rules method. It is found that the mixing angles are large and have the values phi(Xi bc) = 16 degrees +/- 5 degrees and phi(Omega bc) = 18 degrees +/- 6 degrees, respectively. The mixing angles are slightly smaller compared to the predictions of the non-relativistic quark model, phi(Xi bc) = 25.5 degrees and phi(Omega bc) = 25.9 degrees. (c) 2012 Elsevier B.V. All rights reserved.