### Abstract

We compute the recoil polarization of the lambda hyperon and the photon asymmetry for the quasifree photoproduction of kaons in a relativistic mean-field approximation to the Walecka model. Our motivation for studying polarization observables is threefold. First, polarization observables are more effective discriminators of subtle dynamics than the unpolarized cross section. Second, earlier nonrelativistic calculations suggest that polarization observables are relatively insensitive to distortions effects. Finally, this insensitivity entails an enormous simplification in the theoretical treatment. Indeed, by introducing the notion of a "bound-nucleon propagator" we exploit Feynman's trace techniques to develop closed-form, analytic expressions for all photoproduction observables. Moreover, our results indicate that polarization observables are also insensitive to relativistic effects and to the nuclear target. Yet, they are sensitive to the model parameters, making them ideal tools for the study of modifications to the elementary amplitude - such as in the production, propagation, and decay of nucleon resonances - in the nuclear medium.

Original language | English |
---|---|

Pages (from-to) | 146041-146047 |

Number of pages | 7 |

Journal | Physical Review C - Nuclear Physics |

Volume | 61 |

Issue number | 1 |

Publication status | Published - Jan 2000 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Physics and Astronomy(all)
- Nuclear and High Energy Physics

### Cite this

*Physical Review C - Nuclear Physics*,

*61*(1), 146041-146047.

**Quasifree kaon photoproduction from nuclei in a relativistic approach.** / Aburaddad, Laith; Piekarewicz, J.

Research output: Contribution to journal › Article

*Physical Review C - Nuclear Physics*, vol. 61, no. 1, pp. 146041-146047.

}

TY - JOUR

T1 - Quasifree kaon photoproduction from nuclei in a relativistic approach

AU - Aburaddad, Laith

AU - Piekarewicz, J.

PY - 2000/1

Y1 - 2000/1

N2 - We compute the recoil polarization of the lambda hyperon and the photon asymmetry for the quasifree photoproduction of kaons in a relativistic mean-field approximation to the Walecka model. Our motivation for studying polarization observables is threefold. First, polarization observables are more effective discriminators of subtle dynamics than the unpolarized cross section. Second, earlier nonrelativistic calculations suggest that polarization observables are relatively insensitive to distortions effects. Finally, this insensitivity entails an enormous simplification in the theoretical treatment. Indeed, by introducing the notion of a "bound-nucleon propagator" we exploit Feynman's trace techniques to develop closed-form, analytic expressions for all photoproduction observables. Moreover, our results indicate that polarization observables are also insensitive to relativistic effects and to the nuclear target. Yet, they are sensitive to the model parameters, making them ideal tools for the study of modifications to the elementary amplitude - such as in the production, propagation, and decay of nucleon resonances - in the nuclear medium.

AB - We compute the recoil polarization of the lambda hyperon and the photon asymmetry for the quasifree photoproduction of kaons in a relativistic mean-field approximation to the Walecka model. Our motivation for studying polarization observables is threefold. First, polarization observables are more effective discriminators of subtle dynamics than the unpolarized cross section. Second, earlier nonrelativistic calculations suggest that polarization observables are relatively insensitive to distortions effects. Finally, this insensitivity entails an enormous simplification in the theoretical treatment. Indeed, by introducing the notion of a "bound-nucleon propagator" we exploit Feynman's trace techniques to develop closed-form, analytic expressions for all photoproduction observables. Moreover, our results indicate that polarization observables are also insensitive to relativistic effects and to the nuclear target. Yet, they are sensitive to the model parameters, making them ideal tools for the study of modifications to the elementary amplitude - such as in the production, propagation, and decay of nucleon resonances - in the nuclear medium.

UR - http://www.scopus.com/inward/record.url?scp=0033633179&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033633179&partnerID=8YFLogxK

M3 - Article

VL - 61

SP - 146041

EP - 146047

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 1

ER -