Analysis memo (JLab E05-115) 30 May 2014 Graduate school of science, Tohoku University Toshiyuki Gogami.

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Presentation transcript:

Analysis memo (JLab E05-115) 30 May 2014 Graduate school of science, Tohoku University Toshiyuki Gogami

Contents Raster correction on/off p(e,e’K + )Λ 7 Li(e,e’K + ) 7 Λ He z-dependence Initial matrices vs. optimized matrices (Λ)

Contents Raster correction on/off p(e,e’K + )Λ 7 Li(e,e’K + ) 7 Λ He z-dependence Initial matrices vs. optimized matrices (Λ)

Λ from the polyethylene target (450 mg/cm 2 ) [with initial inverse transfer matrices] X [cm] y z x y z M HYP [MeV] The mean value is shifted by ~+150 keV if the correction was not applied. Gaussian SIMULATION

7 Λ He from the 7 Li target (208 mg/cm 2 ) [with initial inverse transfer matrices] X [cm] y z x y z M HYP [MeV] The mean value is shifted by ~+20 keV if the correction was not applied. Gaussian SIMULATION

7 Λ He from the 7 Li target (208 mg/cm 2 ) [with initial inverse transfer matrices] X [cm] y z x y z M HYP [MeV] The mean value is shifted by ~+20 keV if the correction was not applied. Gaussian SIMULATION Effects of the beam raster  (mainly) missing mass shift ~150 keV for Λ ~20 keV for 7 Λ He

FWHM Λ 7 Λ He Target (mg/cm 2 )CH 2 (450) 7 Li (208) w/o raster correction + initial matrices w/ raster correction + initial matrices w/ raster correction + optimized matrices SIMULATION

FWHM Λ 7 Λ He Target (mg/cm 2 )CH 2 (450) 7 Li (208) w/o raster correction + initial matrices w/ raster correction + initial matrices w/ raster correction + optimized matrices SIMULATION A peak (Λ) which was involved for the matrix tuning became narrower (also for Σ 0 and 12 Λ B g.s.)

Contents Raster correction on/off p(e,e’K + )Λ 7 Li(e,e’K + ) 7 Λ He z-dependence Initial matrices vs. optimized matrices (Λ)

Λ from CH 2 target Initial matrices SIMULATION Optimized matrices z [cm] M HYP [MeV] z [cm]

Λ from CH 2 target Initial matrices SIMULATION Optimized matrices z-dependence was not absorbed by the inverse transfer matrices…