Wed·Aug 10, 2011Wednesday·August 10, 2011

1. 01*

   Electroproduction of $\Lambda$(1405)

   Haiyun Lu🇺🇸 · Reinhard Schumacher🇺🇸 · Brian Raue🇺🇸 · Marianna Gabrielyan🇺🇸

   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.

   nucl-exhep-exnucl-thAIP Conf.Proc.(2012)·2 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.