The PARP(77) parameter controls the probability for fast moving strings to reconnect. Higher values correspond to less probability for reconnection. The documentation can be found here.

The data seems to slightly favor the tuning with the parameter increased, corresponding to lower probability to have color reconnection for fast moving strings.

The naming scheme used for the different tunes is:

77 Tune
0.900 AB
1.016 BB
1.100 CB

The different tunes have been compared to CMS data for different pseudorapidities:

d01-x01-y01.png d01-x01-y02.png d01-x01-y03.png d01-x01-y04.png d01-x01-y05.png

-- RasmusSlothHansen - 11-Jul-2011

Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng d01-x01-y01.png r1 manage 24.2 K 2011-07-11 - 17:19 RasmusSlothHansen eta < 0.5 tuning PARP(77)
PNGpng d01-x01-y02.png r1 manage 28.0 K 2011-07-11 - 17:19 RasmusSlothHansen eta < 1.0 tuning PARP(77)
PNGpng d01-x01-y03.png r1 manage 30.6 K 2011-07-11 - 17:19 RasmusSlothHansen eta < 1.5 tuning PARP(77)
PNGpng d01-x01-y04.png r1 manage 33.8 K 2011-07-11 - 17:20 RasmusSlothHansen eta < 2.0 tuning PARP(77)
PNGpng d01-x01-y05.png r1 manage 35.0 K 2011-07-11 - 17:20 RasmusSlothHansen eta < 2.4 tuning PARP(77)
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Topic revision: r1 - 2011-07-11 - RasmusSlothHansen
 
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