Last checks of pp 62 FS

A.Qviller

Settings 2A/B1723 and 3A/B 1723 are analysed with:

• No CC vtx. Normalisation towards total CC yield within -60+40 times a factor of 3.

• Vtx bins 5 cm, 2% accmaps• RICH cut X=+-20 Y=+-15. Back of T5 cut (Y=+-

14)• Fixed 6 sigma cut on back projected y-vertex. • Require trigger 2• Bins with less than 0.6 factor of average

acceptance are removed

Settings 2A/B1723 and 3A/B 1723 are analysed with:

• Flat RICH eff (97%) (not using parametrised eff)

• p, pbar are corrected for RICH contamination (3%)

• nkv2 file for tracking eff. Using XA.• Newest geant files with cut factor 4 for FS. • Chi square cut that removes a small

fraction of tracks on Const*(A+B/p) form

Status of analysis

• MRS analysis is within 5% with FV, considered ok.

• FS spectra in the interval ~6-8% below FV analysis dated 2007-10-29

• Seems to be species independant (k- and p have also been inspected)

Pi plus

Pi minus

Slat 24 is poor in all settings

PID seems ok (2B1723)

Inefficient (blue) area in front T5