Spin asymmetries in γ N → K̄* Θ+

Yongseok Oh, Hungchong Kim, Su Houng Lee

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The photoproduction processes of the exotic Θ+ (1540) baryon and the K̄* meson from the nucleon targets, i.e., γn → K*- Θ+ and γp → K̄*0Θ+, are investigated in a hadronic model. We consider K and K* exchanges as well as the s and u channel nucleon and Θ terms. Various spin asymmetries together with cross sections are first computed in order to study the production mechanisms and the parity of the Θ+ (1540) baryon. Within the uncertainties arising from the model-dependence of the production mechanisms and several coupling constants, we find that some target-recoil double spin asymmetries, Cxx′TR and Cxz′TR, are sensitive to the parity of Θ+. In addition, the parity asymmetry of this reaction on the neutron target, which can be obtained by analyzing K* decay distribution, is found to be useful to estimate the K* N Θ coupling.

Original languageEnglish
Pages (from-to)129-151
Number of pages23
JournalNuclear Physics A
Volume745
Issue number1-2
DOIs
Publication statusPublished - 2004 Nov 29

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parity
asymmetry
baryons
photoproduction
mesons
neutrons
cross sections
decay
estimates

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Oh, Yongseok ; Kim, Hungchong ; Lee, Su Houng. / Spin asymmetries in γ N → K̄* Θ+. In: Nuclear Physics A. 2004 ; Vol. 745, No. 1-2. pp. 129-151.
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Spin asymmetries in γ N → K̄* Θ+. / Oh, Yongseok; Kim, Hungchong; Lee, Su Houng.

In: Nuclear Physics A, Vol. 745, No. 1-2, 29.11.2004, p. 129-151.

Research output: Contribution to journalArticle

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AU - Oh, Yongseok

AU - Kim, Hungchong

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N2 - The photoproduction processes of the exotic Θ+ (1540) baryon and the K̄* meson from the nucleon targets, i.e., γn → K*- Θ+ and γp → K̄*0Θ+, are investigated in a hadronic model. We consider K and K* exchanges as well as the s and u channel nucleon and Θ terms. Various spin asymmetries together with cross sections are first computed in order to study the production mechanisms and the parity of the Θ+ (1540) baryon. Within the uncertainties arising from the model-dependence of the production mechanisms and several coupling constants, we find that some target-recoil double spin asymmetries, Cxx′TR and Cxz′TR, are sensitive to the parity of Θ+. In addition, the parity asymmetry of this reaction on the neutron target, which can be obtained by analyzing K* decay distribution, is found to be useful to estimate the K* N Θ coupling.

AB - The photoproduction processes of the exotic Θ+ (1540) baryon and the K̄* meson from the nucleon targets, i.e., γn → K*- Θ+ and γp → K̄*0Θ+, are investigated in a hadronic model. We consider K and K* exchanges as well as the s and u channel nucleon and Θ terms. Various spin asymmetries together with cross sections are first computed in order to study the production mechanisms and the parity of the Θ+ (1540) baryon. Within the uncertainties arising from the model-dependence of the production mechanisms and several coupling constants, we find that some target-recoil double spin asymmetries, Cxx′TR and Cxz′TR, are sensitive to the parity of Θ+. In addition, the parity asymmetry of this reaction on the neutron target, which can be obtained by analyzing K* decay distribution, is found to be useful to estimate the K* N Θ coupling.

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