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

Fernando S. Navarra; Marina Nielsen; Su Houng Lee

doi:10.1016/j.physletb.2007.04.010

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

Fernando S. Navarra, Marina Nielsen, Su Houng Lee

Department of Physics

Research output: Contribution to journal › Article › peer-review

132 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 J^P = 1⁺. For definiteness, we work with a current with an axial heavy diquark and a scalar light anti-diquark, at leading order in α_s. We consider the contributions of condensates up to dimension eight. For the b-quark, we predict M_{Tb b} = (10.2 ± 0.3) GeV, which is below the over(B, ̄) over(B, ̄)^* threshold. For the c-quark, we predict M_{Tc c} = (4.0 ± 0.2) GeV, in agreement with quark model predictions.

Original language	English
Pages (from-to)	166-172
Number of pages	7
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	649
Issue number	2-3
DOIs	https://doi.org/10.1016/j.physletb.2007.04.010
Publication status	Published - 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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10.1016/j.physletb.2007.04.010

Cite this

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title = "QCD sum rules study of Q Q - over(u,{\= }) over(d,{\= }) mesons",

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.",

author = "Navarra, {Fernando S.} and Marina Nielsen and Lee, {Su Houng}",

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

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doi = "10.1016/j.physletb.2007.04.010",

language = "English",

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T1 - QCD sum rules study of Q Q - over(u, ̄) over(d, ̄) mesons

AU - Navarra, Fernando S.

AU - Nielsen, Marina

AU - Lee, Su Houng

N1 - Funding Information: This work has been partly supported by FAPESP and CNPq-Brazil, and by the Korea Research Foundation KRF-2006-C00011.

PY - 2007/5/31

Y1 - 2007/5/31

N2 - 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.

AB - 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.

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VL - 649

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EP - 172

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 2-3

ER -

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

Abstract

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