Scalar<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>κ</mml:mi></mml:mrow></mml:math>meson in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>K</mml:mi><mml:mrow><mml:mo>*</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>photoproduction

Oh, Yongseok; Kim, Hungchong

doi:10.1103/physrevc.74.015208

Cited by 58 publications

(96 citation statements)

References 41 publications

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“…5 (bottom), which involves an anomalous PVV coupling. This tree level term is insufficient to reproduce the cross section, a fact that motivated the search of other mechanisms, such as the exchange of a scalar κ meson in [18], or an s-channel Δ resonance contribution in [19]. Our results are shown in Fig.…”

Section: The γPsupporting

confidence: 52%

“…Given the discrepancies between the two data sets, we cannot refine further our model. In any case, our results clearly show that the unitarized loop contributions, omitted in previous works [18,19], are an essential ingredient of the model and must be taken into account before invoking the need for other mechanisms.…”

Section: The γPmentioning

confidence: 71%

“…We report here on a theoretical approach [11] that, thanks to the incorporation of vector mesons, gives an explanation to the features observed by the CBELSA/TAPS collaboration in the γp → K 0 Σ + cross section [12,13] , namely a peak around √ s = 1900 MeV followed by a fast downfall around √ s = 2000 MeV, which are not reproduced by resonant-type analyses [14,15]. We also study the γp → K * 0 Σ + reaction, measured by CLAS at Jefferson Lab [16] and CBELSA/TAPS at ELSA [17], finding that the use of a properly unitarized vector meson-baryon amplitude accounts for a sizable amount of the cross section, without the need for the exchange of a κ scalar meson [18] or s-channel Δ contributions [19]. …”

Section: Introductionmentioning

confidence: 99%

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Vector meson-baryon dynamics in photoproduction reactions around 2 GeV

Ramos

Oset

2014

EPJ Web of Conferences

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Abstract. We investigate the role of vector mesons and coupled-channel unitarization on photoproduction reactions off the proton at energies around 2 GeV. We explain the sudden drop on the γp → K 0 Σ + cross section, observed recently by the CBELSA/TAPS collaboration, by a delicate interference between amplitudes having K * Λ and K * Σ intermediate states modulated by the presence of a nearby N * resonance produced by our model, a feature that we have employed to predict its properties. We also show the importance of coupled-channel unitarization in the γp → K * 0 Σ + reaction, measured recently by CBELSA/TAPS and CLAS with conflicting results.

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Section: The γPsupporting

confidence: 52%

Section: The γPmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

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Vector meson-baryon dynamics in photoproduction reactions around 2 GeV

Ramos

Oset

2014

EPJ Web of Conferences

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“…We expect that the upgrades of the experimental facilities can offer a chance to study various physical quantities of K * photoproduction in detail so that one can have enough data for unraveling the excited spectra of the non-strange baryon resonances. Theoretically, K * photoproduction was studied in a quark model [16] and in the effective Lagrangian approach [17,18]. In particular, Refs.…”

Section: Introductionmentioning

confidence: 99%

Contribution of higher nucleon resonances toK*Λphotoproduction

Kim

Nam

et al. 2011

Phys. Rev. D

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We investigate K * Λ(1116) photoproduction off the proton and neutron targets in the effective Lagrangian method in the tree-level Born approximation. In addition to the K, K * , and κ exchanges which are the main contributions to the reaction, we consider the contributions from the higher nucleon resonances D13(2080) and the D15(2200). We find that the D13(2080) plays a crucial role in explaining the enhancement of the near-threshold production rate, which results in a good agreement with the experimental data for the proton targets, while the contribution of the D15(2200) is rather small. A similar conclusion is drawn for K * photoproduction off the neutron targets. In addition to the energy and angular dependence of the cross sections, we present the predictions on the photon-beam asymmetry.

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“…In addition, these reactions have their own interesting physics regarding the structure of hadrons. For example, photoproduction of K * and K * can be used to obtain information on the properties of strange scalar κ mesons [8,9].…”

Section: Introductionmentioning

confidence: 99%