Code review comment for lp:~maddevelopers/mg5amcnlo/3.0.1

marco zaro (marco-zaro) wrote :

Hi Again,
actually, doing p p > e+ ve [LOonly] works ok, at LO, NLO, aMC@LO, aMC@NLO
So it may be something relate to the phase-space of 2->1?
the reason why p p > w+ [LOonly] returns zero is because the function passcuts always returns False, exiting here
c Make sure have reasonable 4-momenta
      if (p(0,1) .le. 0d0) then
         passcuts=.false.
         return
      endif

with P(0,1) = -99

So clearly something goes wrong in the phase space generation. Rikkert, anything that could be related to the granny stuff?

also note that
p p > w+ [QED] has one test failing (soft test for photon emission off the W), where a lot of NaN’s appear
p p > e+ ve [QCD] seems ok though

Cheers,

Marco

> On 9 Nov 2018, at 21:42, marco zaro <email address hidden> wrote:
>
> Hi Olivier,
> it is strange, it seems that the LOonly mode is broken (it always returns zero)
> I will have a look on monday, and let you know.
>
> cheers,
>
> Marco
>
>> On 9 Nov 2018, at 21:10, Olivier Mattelaer <email address hidden> wrote:
>>
>> Hi Marco,
>>
>> The following test is also not passing (going trough ok with 2.6.4):
>> test_madspin_LOonly
>>
>> Even though this is a madspin designed tests, it actually crash within the LOonly module.
>> If you just do
>> geneate p p > w+ [LOonly]
>> It will lead to a crash.
>>
>> I have fixed all the other tests (but a couple of IOtests and i still have to run the short paralel test).
>>
>> Since this is a beta version, we can also decide to not fix this in this version.
>> --
>> https://code.launchpad.net/~maddevelopers/mg5amcnlo/3.0.1/+merge/356133
>> You are requested to review the proposed merge of lp:~maddevelopers/mg5amcnlo/3.0.1 into lp:~maddevelopers/mg5amcnlo/FKS_EW_granny.
>
>
> --
> https://code.launchpad.net/~maddevelopers/mg5amcnlo/3.0.1/+merge/356133
> You are requested to review the proposed merge of lp:~maddevelopers/mg5amcnlo/3.0.1 into lp:~maddevelopers/mg5amcnlo/FKS_EW_granny.

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