Changes between Version 1 and Version 2 of FAQMatching2
 Timestamp:
 04/06/12 16:33:02 (7 years ago)
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FAQMatching2
v1 v2 2 2 3 3 Yes, you can, the shape of distributions are kept. However the normalization change. 4 In the case you use scalefact and alpsfact in the run_card, this change of scales can be compensated by using the parameters %$PARP(64)$% and %$PARP(72)$%.4 In the case you use scalefact and alpsfact in the run_card, this change of scales can be compensated by using the parameters $PARP(64)$ and $PARP(72)$. 5 5 Let's see this in more details: 6 6 … … 13 13 For Pythia, the parameters are: 14 14 15 * For spacelike showers: PARP(64) is factor of %$K_{T}^{2}$%(note squared, so alpsfact=2 corresponds to PARP(64)=4)16 * For timelike showers: %$\Lambda_{QCD}$%is given in PARP(72), so this value should be multiplied by 0.5 when alpsfact is 2, and by 2 when alpsfact is 0.5. The default value is 0.25 !GeV.15 * For spacelike showers: PARP(64) is factor of $K_{T}^{2}$ (note squared, so alpsfact=2 corresponds to PARP(64)=4) 16 * For timelike showers: $\Lambda_{QCD}$ is given in PARP(72), so this value should be multiplied by 0.5 when alpsfact is 2, and by 2 when alpsfact is 0.5. The default value is 0.25 !GeV. 17 17 18 18  Main.SimonDeVisscher  02 Mar 2009 … … 22 22 23 23 24