A QCD sum rule approach with an explicit di-quark field

Kyung Il Kim; Daisuke Jido; Su Houng Lee

doi:10.1063/1.3647428

A QCD sum rule approach with an explicit di-quark field

Kyung Il Kim, Daisuke Jido, Su Houng Lee

Department of Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In hadron phenomenology, diquark structures can be an important degree of freedom in certain configurations. We investigate the possibility that the diquark structure can be treated as an elementary field in certain configurations. To start with, we assume that Λ is composed of a spectator strange quark and a diquark. We construct a QCD sum rule for Λ, where the input parameters are the diquark mass and its condensate, in addition to other parameters of QCD sum rules. We find good Borel curve for the Λ mass for certain combinations of the diquark mass and condensate, and that smaller diquark condensate is needed when the diquark mass is increased to maintain the good Borel curve. The same sets of diquark mass and condensate are found to work well for Λ_c and Λ_b.

Original language	English
Title of host publication	International Conference on the Structure of Baryons, BARYONS'10
Pages	447-450
Number of pages	4
DOIs	https://doi.org/10.1063/1.3647428
Publication status	Published - 2011
Event	International Conference on the Structure of Baryons, BARYONS'10 - Osaka, Japan Duration: 2010 Dec 7 → 2010 Dec 11

Publication series

Name	AIP Conference Proceedings
Volume	1388
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	International Conference on the Structure of Baryons, BARYONS'10
Country	Japan
City	Osaka
Period	10/12/7 → 10/12/11

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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AB - In hadron phenomenology, diquark structures can be an important degree of freedom in certain configurations. We investigate the possibility that the diquark structure can be treated as an elementary field in certain configurations. To start with, we assume that Λ is composed of a spectator strange quark and a diquark. We construct a QCD sum rule for Λ, where the input parameters are the diquark mass and its condensate, in addition to other parameters of QCD sum rules. We find good Borel curve for the Λ mass for certain combinations of the diquark mass and condensate, and that smaller diquark condensate is needed when the diquark mass is increased to maintain the good Borel curve. The same sets of diquark mass and condensate are found to work well for Λc and Λb.

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