Jet/ photon misidentify

Dear Safinaz,

1) PGS is not a program part of the MG5aMC suite. Our code offers an interface to that code but it is not developed and not maintained by us.
2) PGS is actually not supported anymore, the author of that code encourage to use Delphes instead which is much more accurate.

So if you think that PGS is doing some error, I would rather suggest you to not use it.

> Also when I make cut selection on the M(a[1] a[2]) mass window such that:
> select 105 < M(a[1] a[2]) < 140 to reduce the events come from ( p p > b b~ gamma gamma ), unexpectedly all (pp > h > b b~)
> events go to zero !!

Well since you do not have photon in the pp > h > b b~, all the events are probably discarded.

> I think there are here a misidentification between photons and jets .. I wonder how this can be resolved ?
> should I resolve these in MA, or can I avoid this misidentification when I generate the lhco file in MG ?

I’m not sure to understand your problem. But one think is sure this is not at the level of MG5aMC.

Cheers,

Olivier

> On Aug 4, 2016, at 14:37, S.S. <email address hidden> wrote:
>
> New question #322145 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/322145
>
>
> Dear sir,
>
> I posted before a question similar to this question (https://answers.launchpad.net/mg5amcnlo/+question/298251)
>
> Where I generated the lhco files for the following processes by PGS:
>
> pp > a a b b~
> pp > h > a a
> pp > h > b b~
>
> my previous problem was that when I import these files together in Madanalysis Reco level, the photons appear in the plots of the b-jets pairs, but I understood that that due to parton showering where it's natural to have extra photons products ..
>
> But now the problem is revised, i.e, when I plot the invariant mass of the photons, there are jets appear close to zero while the diphoton mass centred around 125 GeV ... I don't know what are these jets belong to (which have vanishing mass) ?
>
> Also when I make cut selection on the M(a[1] a[2]) mass window such that:
> select 105 < M(a[1] a[2]) < 140 to reduce the events come from ( p p > b b~ gamma gamma ), unexpectedly all (pp > h > b b~)
> events go to zero !!
>
> I think there are here a misidentification between photons and jets .. I wonder how this can be resolved ?
> should I resolve these in MA, or can I avoid this misidentification when I generate the lhco file in MG ?
>
> Thanks,
> Safinaz
>
>
>
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