A QCD sum rule study of Θ+ in nuclear matter

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dc.contributor.authorNavarra F.S.
dc.contributor.authorNielsen M.
dc.contributor.authorTsushima K.
dc.date.accessioned2024-03-13T01:44:10Z
dc.date.available2024-03-13T01:44:10Z
dc.date.issued2005
dc.description.abstractWe consider a [ud]2s̄ current, in the finite-density QCD sum rule approach, to investigate the scalar and vector self-energies of the recently observed pentaquark state Θ+(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. © 2004 Elsevier B.V. All rights reserved.
dc.description.firstpage335
dc.description.issuenumber3-4
dc.description.lastpage341
dc.description.volume606
dc.identifier.doi10.1016/j.physletb.2004.12.016
dc.identifier.issn0370-2693
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/37882
dc.relation.ispartofPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
dc.rightsAcesso Restrito
dc.titleA QCD sum rule study of Θ+ in nuclear matter
dc.typeArtigo
local.scopus.citations13
local.scopus.eid2-s2.0-12344255775
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=12344255775&origin=inward
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