QCD sum rules study of Q Q - over(u, ̄) over(d, ̄) mesons

Fernando S. Navarra, Marina Nielsen, Su Houng Lee

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76 Citations (Scopus)

Abstract

We use QCD sum rules to study the possible existence of Q Q - over(u, ̄) over(d, ̄) mesons, assumed to be a state with JP = 1+. For definiteness, we work with a current with an axial heavy diquark and a scalar light anti-diquark, at leading order in αs. We consider the contributions of condensates up to dimension eight. For the b-quark, we predict MTb b = (10.2 ± 0.3)   GeV, which is below the over(B, ̄) over(B, ̄)* threshold. For the c-quark, we predict MTc c = (4.0 ± 0.2)   GeV, in agreement with quark model predictions.

Original languageEnglish
Pages (from-to)166-172
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume649
Issue number2-3
DOIs
Publication statusPublished - 2007 May 31

Bibliographical note

Funding Information:
This work has been partly supported by FAPESP and CNPq-Brazil, and by the Korea Research Foundation KRF-2006-C00011.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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