Quasifree η photoproduction from nuclei and medium modifications of resonances

B. I S Van der Ventel, Laith Aburaddad, G. C. Hillhouse

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This paper establishes the case that the process of quasifree η photoproduction from nuclei is an important tool to study medium modifications and changes to the elementary process γN → ηN in the nuclear medium. We investigate the sensitivity of the differential cross section, recoil nucleon polarization, and the photon asymmetry to changes in the elementary amplitude, medium modifications of the resonance (S11, D13) masses, as well as nuclear target effects. All calculations are performed within a relativistic plane-wave impulse approximation formalism resulting in analytical expressions for all observables. Our results indicate that polarization observables are largely insensitive to nuclear target effects. Depending on the type of coupling, the spin observables do display a sensitivity to the magnitude of the ηNN coupling constant. The polarization observables are identified to be the prime candidates to investigate the background processes and their medium modifications in the elementary process such as the D13 resonance. Moreover, as a consequence of the large dominance in the differential cross section of the S11 resonance, the quasifree differential cross section provides an exceptional instrument to study medium modifications to the S11 resonance in such a manner that helps to distinguish between various models that attempt to understand the S11 resonance and its distinctive position as the lowest lying negative parity state in the baryon spectrum.

Original languageEnglish
Pages (from-to)246011-2460111
Number of pages2214101
JournalPhysical Review C - Nuclear Physics
Volume68
Issue number2
Publication statusPublished - Aug 2003
Externally publishedYes

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photoproduction
nuclei
cross sections
polarization
sensitivity
impulses
baryons
parity
plane waves
asymmetry
formalism
photons
approximation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Quasifree η photoproduction from nuclei and medium modifications of resonances. / Van der Ventel, B. I S; Aburaddad, Laith; Hillhouse, G. C.

In: Physical Review C - Nuclear Physics, Vol. 68, No. 2, 08.2003, p. 246011-2460111.

Research output: Contribution to journalArticle

Van der Ventel, B. I S ; Aburaddad, Laith ; Hillhouse, G. C. / Quasifree η photoproduction from nuclei and medium modifications of resonances. In: Physical Review C - Nuclear Physics. 2003 ; Vol. 68, No. 2. pp. 246011-2460111.
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