QCD sum rules for the anticharmed pentaquark

Yasemin Sarac, Hungchong Kim, Su Houng Lee

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We present a QCD sum rule analysis for the anticharmed pentaquark state with and without strangeness. While the sum rules for most of the currents are either nonconvergent or dominated by the DN continuum, the one for the nonstrange pentaquark current composed of two diquarks and an antiquark is convergent and has a structure consistent with a positive-parity pentaquark state after subtracting out the DN continuum contribution. Arguments are presented on the similarity between the result of the present analysis and that based on the constituent quark models, which predict a more stable pentaquark state when the antiquark is heavy.

Original languageEnglish
Article number014009
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume73
Issue number1
DOIs
Publication statusPublished - 2006 Jan 1

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sum rules
quantum chromodynamics
continuums
strangeness
quark models
parity

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

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QCD sum rules for the anticharmed pentaquark. / Sarac, Yasemin; Kim, Hungchong; Lee, Su Houng.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 73, No. 1, 014009, 01.01.2006.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Kim, Hungchong

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N2 - We present a QCD sum rule analysis for the anticharmed pentaquark state with and without strangeness. While the sum rules for most of the currents are either nonconvergent or dominated by the DN continuum, the one for the nonstrange pentaquark current composed of two diquarks and an antiquark is convergent and has a structure consistent with a positive-parity pentaquark state after subtracting out the DN continuum contribution. Arguments are presented on the similarity between the result of the present analysis and that based on the constituent quark models, which predict a more stable pentaquark state when the antiquark is heavy.

AB - We present a QCD sum rule analysis for the anticharmed pentaquark state with and without strangeness. While the sum rules for most of the currents are either nonconvergent or dominated by the DN continuum, the one for the nonstrange pentaquark current composed of two diquarks and an antiquark is convergent and has a structure consistent with a positive-parity pentaquark state after subtracting out the DN continuum contribution. Arguments are presented on the similarity between the result of the present analysis and that based on the constituent quark models, which predict a more stable pentaquark state when the antiquark is heavy.

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