Electroproduction of $Λ$(1405)

Details Electroproduction of $Λ$(1405) Electroproduction of $Λ$(1405)

2011-08-08

arxiv.org/abs/1108.1809v2

Physics

Nuclear Physics

Nuclear Experiment

4 pages, 6 figures, Contribution to the Proceedings of "NSTAR2011 - The 8th International Workshop on the Physics of Excited N

Scientific paper

The electroproduction of $K^+ \Lambda$ (1405) was studied by analyzing the E1F data set collected in Hall B at Jefferson Lab. The analysis utilized the decay channel $\Sigma^+ \pi^-$ of the $\Lambda$ (1405) and $p \pi^0$ of the $\Sigma^+$. Simulations of background, $\Lambda$ (1405) and $\Lambda$ (1520) production according to PDG values were performed by using standard CLAS analysis tools adapted for the E1F run. Fits of the acceptance-corrected simulations were made to the acceptance-corrected data to determine contributions from signal and background processes. The line shape of $\Lambda$ (1405) varies with the four momentum transfer, $Q^2$, and does not match the line shape based on PDG resonance parameters. It corresponds approximately to predictions of a recent two-pole meson-baryon picture of this state.

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