A Genetic Algorithm Analysis of N* Resonances in $p(γ,K^{+})Λ$ Reactions

Details A Genetic Algorithm Analysis of N* Resonances in $p(γ,K^{+})Λ$ Reactions A Genetic Algorithm Analysis of N* Resonances in $p(γ,K^{+})Λ$ Reactions

2003-12-23

arxiv.org/abs/nucl-th/0312103v3

Physics

Nuclear Physics

Nuclear Theory

34 pages, 11 figures; Revised version accepted for publication by Nuclear Physics A

Scientific paper

10.1016/j.nuclphysa.2004.05.007

The problem of extracting information on new and known $N^{*}$ resonances by fitting isobar models to photonuclear data is addressed. A new fitting strategy, incorporating a genetic algorithm, is outlined. As an example, the method is applied to a typical tree-level analysis of published $p(\gamma,K^{+})\Lambda$ data. It is shown that, within the limitations of this tree-level analysis, a resonance in addition to the known set is required to obtain a reasonable fit. An additional $P_{11}$ resonance, with a mass of about 1.9 GeV, gives the best agreement with the published data, but additional $S_{11}$ or $D_{13}$ resonances cannot be ruled out. Our genetic algorithm method predicts that photon beam asymmetry and double polarization $p(\gamma,K^{+})\Lambda$ measurements should provide the most sensitive information with respect to missing resonances.

Affiliated with

Also associated with

No associations

Rating

A Genetic Algorithm Analysis of N* Resonances in $p(γ,K^{+})Λ$ Reactions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Genetic Algorithm Analysis of N* Resonances in $p(γ,K^{+})Λ$ Reactions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Genetic Algorithm Analysis of N* Resonances in $p(γ,K^{+})Λ$ Reactions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-323407