# Run_card.dat

Asked by NADY

Hi Johan,
In the file "run_car,dat" in my process
under Minimum and maximum pt's
I found that
1d5 = ptlmax ! maximum pt for the charged leptons
Here "1d5" what does it stand for?
Cheers,
Nady

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 Revision history for this message Johan Alwall (johan-alwall) said on 2011-11-09: #1

Hello Nady,

1d5 = 1e5 (1\times 10^5). This is just a large number (in GeV). It should be larger than the CM energy of the collider.

Best,
Johan

 Revision history for this message NADY (nady-bakhet) said on 2011-11-09: #2

Hi Johan
Thanks
if i want to just the |eta|<2.5 then i will change these lines in run_card.dat
2.5 = etal ! max rap for the charged leptons
0d0 = etaamin ! min rap for the photons
by
2.5 = etal ! max rap for the charged leptons
2.5 = etaamin ! min rap for the photons
True or false
Nady

 Revision history for this message NADY (nady-bakhet) said on 2011-11-09: #3

Hi Johan
Thanks
if i want to just the |eta|<2.5 then i will change these lines in run_card.dat
2.5 = etal ! max rap for the charged leptons
0d0 = etaamin ! min rap for the charged leptons
by
2.5 = etal ! max rap for the charged leptons
2.5 = etalmin ! min rap for the charged leptons
True or false
Nady

 Revision history for this message NADY (nady-bakhet) said on 2011-11-09: #4

Hi Johan
Thanks
if i want to just the |eta|<2.5 then i will change these lines in run_card.dat
2.5 = etal ! max rap for the charged leptons
0d0 = etalmin ! min rap for the charged leptons
by
2.5 = etal ! max rap for the charged leptons
2.5 = etalmin ! min rap for the charged leptons
True or false
Nady

 Revision history for this message Johan Alwall (johan-alwall) said on 2011-11-09: #5

Hello Nady,

etaX and etaXmin give the maximum and minimum absolute rapidities. So you should leave the parameters at their default values.

Johan

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