/ Phenomenology-HEP hep-ph/0412127

Triquark correlations and pentaquarks in a QCD sum rule approach

Lee, Hee-Jung (Valencia U.) ; Kochelev, N.I. (Dubna, JINR) ; Vento, V. (Valencia U.)

Published in: Phys.Lett.
Year: 2005
Vol.: B610
Page No: 50-60
Pages: 12

Abstract: The role of quark correlations in the description of hadron dynamics in many domains of physics, from low energy dynamics to very hot(dense) systems, is being appreciated. Strong correlations of two quarks (diquark) have been widely investigated in this respect. Recently, we have proposed a dynamical scheme to describe the $\Theta^+$ pentaquark in which also three quark correlations (triquark) were instrumental in producing a low mass exotic state. We perform a study, within the QCD sum rule approach including OPE and direct instanton contributions, of triquark correlations and obtain two quasi-bound light $ud\bar{s}$ color quark clusters of 800 MeV and 930 MeV respectively.

Keyword(s): Quarks ; Instanton ; Hadrons ; Pentaquark

Web-Page: http://dx.doi.org/10.1016/j.physletb.2005.01.081

Total numbers of views: 887
Numbers of unique views: 431
 Record created 2010-10-28, last modified 2014-01-30

External link:
Download fulltext
Rate this document:

Rate this document:
(Not yet reviewed)