Mass systematics from Color Reconnection

Just a few plots and 1 table.

Got the samples on Monday. I will have more info soon.

Nathan provided top Ntuples for the new PYTHIA (V6.419).

This version has been tuned with LEP data.

Will show only results from matching events in MC, as done before.

We are running the MTM3 machinary to see what we get from an actual mass measurement

W and Top Mass shifts

M=175 GeV

V6.2 (tune A)

V6.4 ACR

V6.4 NOCR

V6.4 S0

Comparison of the PRO files with ttkt75

Comparison: old tune-new tune

Numbers in red show discrepancies at the 2 sigma level

With the tuned PYTHIA, the top mass discrepancy is larger, while ACR and NOCR look OK. We need to understand this

2002-04-21T14:25:46