A QCD sum rule study of Theta(+) in nuclear matter

dc.contributorUniversidade de São Paulo (USP)
dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniv Mackenzie
dc.date.accessioned2014-05-20T14:07:30Z
dc.date.available2014-05-20T14:07:30Z
dc.date.created2014-05-20T14:07:30Z
dc.date.issued2005-01-27
dc.identifierPhysics Letters B. Amsterdam: Elsevier B.V., v. 606, n. 3-4, p. 335-341, 2005.
dc.identifier0370-2693
dc.identifierhttp://hdl.handle.net/11449/23698
dc.identifier10.1016/j.physletb.2004.12.016
dc.identifierWOS:000226696600015
dc.description.abstractWe consider a [ud](2)(s) over bar current, in the finite-density QCD sum rule approach, to investigate the scalar and vector self-energies of the recently observed pentaquark state Theta(+)(1540), propagating in nuclear matter. We find that, opposite to what was obtained for the nucleon, the vector self-energy is negative, and the scalar self-energy is positive. There is a substantial cancellation between them resulting in an attractive net self-energy of the same order as in the nucleon case. (C) 2004 Elsevier B.V. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationPhysics Letters B
dc.relation4.254
dc.relation2,336
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.titleA QCD sum rule study of Theta(+) in nuclear matter
dc.typeArtículos de revistas


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