MadGraph5_aMC@NLO

Photon from proton

Asked by Kentarou Mawatari

Dear Olivier,

     2 = lpp2 ! beam 2 type
 ...
 True = fixed_fac_scale ! if .true. use fixed fac scale

not enough to run with photon from proton? I got

InvalidRunCard : Since 2.7.1 Photon from proton are using fixed scale value of muf [dsqrt_q2fact2] as the cut of th Improved Weizsaecker-Williams formula. Please edit it accordingly.

thanks in advance,
Kentarou

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Olivier Mattelaer
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Best Olivier Mattelaer (olivier-mattelaer) said : 		#1

Do you really want to use MZ in this case?
Just change that fix-scale and it should go trough (only by a little if you really want MZ)

Cheers,

Olivier

> On 27 Apr 2020, at 04:22, Kentarou Mawatari <email address hidden> wrote:
>
> New question #690228 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/690228
>
> Dear Olivier,
>
> 2 = lpp2 ! beam 2 type
> ...
> True = fixed_fac_scale ! if .true. use fixed fac scale
>
> not enough to run with photon from proton? I got
>
> InvalidRunCard : Since 2.7.1 Photon from proton are using fixed scale value of muf [dsqrt_q2fact2] as the cut of th Improved Weizsaecker-Williams formula. Please edit it accordingly.
>
> thanks in advance,
> Kentarou
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Revision history for this message
Kentarou Mawatari (kentarou-mawatari) said : 		#2

Thanks Olivier Mattelaer, that solved my question.

Revision history for this message
Sardar M Imran (sardarimran) said : 		#3

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