Inclusive photoproduction of η mesons on complex nuclei

Hedayati-Poor, M.; Sherif, H.

doi:10.1103/physrevc.58.326

Cited by 4 publications

(10 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this paper we extend a previous relativistic model for quasifree photoproduction of η mesons on complex nuclei [7,8] to the case of incoherent η-photoproduction. The main ingredients of the present treatment are as follows.…”

Section: Introductionmentioning

confidence: 89%

Relativistic calculations for incoherent photoproduction of η mesons

Blokland¹,

Sherif²

2001

Nuclear Physics A

View full text Add to dashboard Cite

We develop a relativistic model for incoherent η-photoproduction on nuclei. The elementary process is described using an effective Lagrangian containing photons, nucleons, the S 11 (1535) and D 13 (1520) nucleon resonances, and ρ, ω, and η mesons. The nucleon and η wavefunctions are obtained from relativistic wave equations. Final-state interactions of the outgoing particles are included via optical potentials. The effects of these interactions are found to be large and lead to reduced cross sections.The incoherent cross sections for isovector transitions are much larger than those for isoscalar ones. The dominant contributions are those from the S 11 and D 13 resonances. We find important interference effects between the contributions of these two resonances. We give some detailed calculations for the cross sections for incoherent η-photoproduction on 12 C. We find that the incoherent cross section for a subset of states in the excitation energy region below 17 MeV are significantly larger than those of the coherent process. These cross sections may thus be accessible experimentally.

show abstract

Section: Introductionmentioning

confidence: 89%

Relativistic calculations for incoherent photoproduction of η mesons

Blokland¹,

Sherif²

2001

Nuclear Physics A

View full text Add to dashboard Cite

show abstract

“…This meson is the only detected particle and there is no information about the final state of the nuclear system. In the present work it is assumed that the inclusive reaction is based on the exclusive reaction in which a single nucleon is ejected in the continum in the course of the production process [18,19]. The transition amplitude for the exclusive reaction through the S 11 resonance, in its full non-local form, is given by [15], As is explained in [19], the wave function of the final nucleon (ψ sf (y)) is taken to be a plane wave.…”

Section: Formalismmentioning

confidence: 99%

“…In the present work it is assumed that the inclusive reaction is based on the exclusive reaction in which a single nucleon is ejected in the continum in the course of the production process [18,19]. The transition amplitude for the exclusive reaction through the S 11 resonance, in its full non-local form, is given by [15], As is explained in [19], the wave function of the final nucleon (ψ sf (y)) is taken to be a plane wave. Calculations without inclusion of the final state interaction of η meson revealed that the u-channel contribution (second term in (1)) is less by two orders of magnitude than that of s-channel (first term in (1)).…”

Section: Formalismmentioning

confidence: 99%

“…where we use a plane wave function (see ref. [19]) for the final state of the struck nucleon; χ sf denotes its spin state. The function W (y) has the following form…”

Section: Formalismmentioning

confidence: 99%

“…The transition function for the u-channel Z u s f M B is calculated in the local approximation and is the same as eq. (3) in [19]. The corresponding function for the s-channel is calculated in non-local approach described above and is Z s…”

Section: Formalismmentioning

confidence: 99%

See 2 more Smart Citations

Inclusive photoproduction of η mesons on nuclei and the in-medium properties of theS11resonance

Hedayati-Poor¹,

Sherif

2007

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

A relativistic non-local model for the inclusive photoproduction of η mesons from complex nuclei is introduced. The model is based on the dominance of the S 11 (1535) resonance. We compare the results of our calculations with the available data on inclusive cross sections for the nuclei C, Al and Cu. Assuming the resonance propagates freely in the nuclear medium, we find that the calculated angular distribution and energy dependence of the cross sections reproduce the data in a reasonable fashion. The present non-local model allows the inclusion of density dependent mass and width in the calculations. Including these in the calculations reveals that the presently available data do not show clear preference for the inclusion of such modifications of the properties of the S 11 (1535) in the nuclear medium.

show abstract