Production of hyperons by virtual photons

Azemoon, T.; Dammann, I.; Driver, Christine; Lüke, D.; Specht, G.; Héinloth, K.; Ackermann, H.; Ganssauge, E.; Janata, F.; Schmidt, D.

doi:10.1016/0550-3213(75)90481-2

Cited by 43 publications

(19 citation statements)

References 10 publications

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“…The reason for restricting the photoproduction data sets only to these energies is that in the higher-energy region (W > 2.4 GeV) more resonances with masses larger than 2 GeV and with the spin higher than 5/2 should be included [24]. The electroproduction data which we have used are the data for unseparated cross section σ U [11,[25][26][27][28][29], data for transversal σ T and longitudinal σ L cross sections [11,30,31], data for σ LT ′ [32], and differential cross section σ K [12]. Altogether we used 3554 data points in the fitting procedure (3383 and 171 for photoproduction and electroproduction, respectively).…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Photo- and electroproduction of K+Λ with a unitarity-restored isobar model

Skoupil

Bydžovský

2018

Phys. Rev. C

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Exploiting the isobar model, kaon photo-and electroproduction on the proton in the resonance region comes under scrutiny. An upgrade of our previous model, comprising higher-spin nucleon and hyperon exchanges in the consistent formalism, was accomplished by implementing energydependent widths of nucleon resonances, which leads to a different choice of hadron form factor with much softer values of cutoff parameter for the resonant part. For a reliable description of electroproduction, the necessity of including longitudinal couplings of nucleon resonances to virtual photons was revealed. We present a new model whose free parameters were adjusted to photo-and electroproduction data and which provides a reliable overall description of experimental data in all kinematic regions. The majority of nucleon resonances chosen in this analysis coincide with those selected in our previous analysis and also in the Bayesian analysis with the Regge-plus-resonance model as the states contributing to this process with the highest probability.

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Section: Discussion Of Resultsmentioning

confidence: 99%

Photo- and electroproduction of K+Λ with a unitarity-restored isobar model

Skoupil

Bydžovský

2018

Phys. Rev. C

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“…A better agreement with these new data could certainly be achieved by changing the values of the K and K * form factor mass scales but this would destroy the nice agreement with the other kaon electroproduction data [14][15][16][17][18][19][20], for which W > 2.1 GeV and which were presented in Ref. [7].…”

Section: Fig 1 Qmentioning

confidence: 88%

Exclusive electromagnetic production of strangeness on the nucleon: Regge analysis of recent data

2003

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In view of the numerous experimental results recently released, we provide in this letter an update on the performance of our simple Regge model for strangeness electroproduction on the nucleon. Without refitting any parameters, a decent description of all measured observables and channels is achieved. We also give predictions for spin transfer observables, recently measured at Jefferson Lab which have high sensitivity to discriminate between different theoretical approaches.

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“…In contrast to pion production the pole term contributes to the transverse amplitudes in this case [110]. [81,82,79,74,80,85,86,87,88,89,90] and [91,92,93,94,95,96,97,98,99,100,101]. The open symbols denote exclusive π + and the filled symbols K + electroproduction data.…”

Section: Review Of Pseudoscalar Mesons Data and Interpretation 41 Thmentioning

confidence: 99%