Measurement of γp→K + Λ and γp→K + Σ 0 at photon energies up to 1.47 GeV

Bockhorst, M.; Burbach, G.; Burgwinkel, R.; Empt, J.; Guse, B.; Haas, K. M.; Hannappel, J.; Héinloth, K.; Hey, Tony; Hoffmann-Rothe, P.; Honscheid, K.; Jahnen, T.; Jakob, H.‐P.; Jöpen, N.; Jüngst, H.; Kirch, U.; Klein, Frank; Kostrewa, D.; Lindemann, Lars; Link, J. M.; Manns, J.; Menze, D.; Merkel, H.; Merkel, Rudolf; Neuerburg, W.; Paul, E.; Plötzke, R.; Schenk, U.; Schmidt, Sebastian; Scholmann, J.; Schütz, P.; Schultz‐Coulon, H.‐C.; Schweitzer, Marc Alexander; Schwille, W. J.; Tran, M. Q.; Umlauf, G.; Vogl, W.; Wedemeyer, R.; Wehnes, F.; Wißkirchen, J.; Wolf, A.

doi:10.1007/bf01577542

Cited by 51 publications

(40 citation statements)

References 19 publications

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“…Recently, there have been considerable interests to study the meson photoproductions off nucleons. The data from ELSA in the kaon [1] and η [2] productions, from MAMI [3] and BATES [4] in the η production have been published. Further experiments have also been planned at the Continuous Electron Beam Accelerator Facility (CEBAF) [5] and other electron accelerator facilities, which will provide a complete set of data in π, K, and η photoproductions with much better energy and angular resolutions.…”

Section: Introductionmentioning

confidence: 99%

Unified approach to pseudoscalar meson photoproductions off nucleons in the quark model

1997

Phys. Rev. C

118

217

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A unified approach to the pseudoscalar meson (, , and K) photoproductions off nucleons are presented.It begins with the low energy QCD Lagrangian, and the resonances in the s and u channels are treated in the framework of the quark model. The duality hypothesis is imposed to limit the number of the t-channel exchanges. The CGLN amplitudes for each reaction are evaluated, which include both proton and neutron targets. The important role of the S-wave resonances in the second resonance region is discussed, and is particularly important for the K, , and Ј photoproductions. ͓S0556-2813͑97͒01908-0͔ PACS number͑s͒: 13.75.Gx, 13.40.Hq, 13.60.Le, 12.39.Ba ␣ NN in the production or ␣ KN⌳ and ␣ KN⌺ for kaon productions.The paper is organized as follows. In Sec. II, the theoretical framework is established in meson photoproductions starting from the low energy QCD Lagrangian. The formalism in the chiral quark model is presented for the s-and u-channel resonances in Sec. III. We shall show how the CGLN amplitudes for the s-and u-channel resonances are derived in the quark model. Although our approach starts with the low energy QCD Lagrangian, it could also be ex-

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Section: Introductionmentioning

confidence: 99%

Unified approach to pseudoscalar meson photoproductions off nucleons in the quark model

1997

Phys. Rev. C

118

217

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“…This extension is clearly parameter free. Experimental data exist for the reactions γp → K + Λ and γp → K + Σ [15]. An analysis of these experimental data would help constrain the known low energy effective constants, and would determine the values of previously unknown constants.…”

Section: Discussionmentioning

confidence: 99%

“…The field Λ * describes the state Λ(1405) introduced as an elementary field with Λ * KN coupling constant g 2 Λ * =0. 15. As in Ref.…”

Section: Effective Chiral Lagrangianmentioning

confidence: 94%

Chiral dynamics of low-energy kaon-baryon interactions with explicit resonance

Krippa

Londergan

1998

Phys. Rev. C

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The processes involving low energy KN and Y π interactions (where Y = Σ or Λ) are studied in the framework of heavy baryon chiral perturbation theory with the Λ(1405) resonance appearing as an independent field. The leading and next-to-leading terms in the chiral expansion are taken into account. We show that an approach which explicitly includes the Λ(1405) resonance as an elementary quantum field gives reasonable descriptions of both the threshold branching ratios and the energy dependence of total cross sections.

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“…[14] and the data in Ref. [17], i.e., we use 251 the experimental data: 197 differential cross section, 21 total cross section, 30 Λ-polarization asymmetry, 3 target-polarization asymmetry, and 1 radiative kaon capture ratio data. Our fitting procedure is fulfilled by using a CERN library package MINUIT [64].…”

Section: A General Schemementioning

confidence: 99%

An isobaric model for kaon photoproduction

et al. 2001

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The kaon photoproduction is analyzed up to E Lab γ =2.0 GeV by using an isobaric model based on effective Lagrangians and by taking a cross symmetry into account. Both pseudovector and pseudoscalar couplings for kaonbaryon-baryon (baryon spin=1/2) interactions are considered with form factors. A vector meson(K * (890)), an axial vector meson(K 1 (1270)), nucleon resonances(J ≤ 5/2), and hyperon resonances(J ≤ 3/2) are treated as participating particles. By determining unknown coupling constants through a systematic fitting of the differential cross section, the total cross section, the single polarization observable, and the radiative kaon capture branching ratio to their experimental data, we find out a simple model which reproduces all the experimental data well.

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Measurement of γp→K + Λ and γp→K + Σ 0 at photon energies up to 1.47 GeV

Cited by 51 publications

References 19 publications

Unified approach to pseudoscalar meson photoproductions off nucleons in the quark model

Unified approach to pseudoscalar meson photoproductions off nucleons in the quark model

Chiral dynamics of low-energy kaon-baryon interactions with explicit resonance

An isobaric model for kaon photoproduction

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