MadGraph5_aMC@NLO

  1. Bug #1493832
  2. Comment #7

Comment 7 for bug 1493832

Revision history for this message
Olivier Mattelaer (olivier-mattelaer) wrote : Re: [Bug 1493832] Re: Phase space problem

Hi Tiago,

A workaround for this bug is to generate with the following syntax:

generate p p > tp tp~ > h t h t~, (t > w+ b, w+ > l+ vl), (t~ > w- b~,\
w- > l- vl~) @1
add process p p > tp tp~ > h t z t~, (t > w+ b, w+ > l+ vl),( t~ > w- \
b~, w- > l- vl~), z > l+ l- @2
add process p p > tp tp~ > h t w- b~, (t > w+ b, w+ > l+ vl), w- > l- \
vl~ @3
add process p p > tp tp~ > z t h t~, (t > w+ b, w+ > l+ vl), (t~ > w- \
b~, w- > l- vl~), z > l+ l- @4
add process p p > tp tp~ > z t z t~, (t > w+ b, w+ > l+ vl), (t~ > w- \
b~, w- > l- vl~), z > l+ l- @5
add process p p > tp tp~ > z t w- b~, (t > w+ b, w+ > l+ vl), z > l+ l\
-, w- > l- vl~ @6
add process p p > tp tp~ > w+ b h t~, (t~ > w- b~, w- > l- vl~), w+ > \
l+ vl @7
add process p p > tp tp~ > w+ b z t~, (t~ > w- b~, w- > l- vl~), w+ > \
l+ vl, z > l+ l- @8
add process p p > tp tp~ > w+ b w- b~, w+ > l+ vl, w- > l- vl~ @9

Cheers,

Olivier

On 26 Sep 2015, at 00:37, Tiago Vale <email address hidden> wrote:

> Hello Olivier,
>
> Thank you very much for your answer and your help. I appreciate it.
>
> Good work.
> Cheers,
> Tiago
>
> On Sat, Sep 26, 2015, 12:35 AM Olivier Mattelaer <
> <email address hidden>> wrote:
>
>> Hi Tiago,
>>
>> I succeed to reproduce the problem.
>> The reason of the "no phase-space" is due that you run in multi-core.
>> Some core have already started the computation when some other are still
>> compiling the code.
>> (So far this is normal)
>> the problem is that the node started the computation crashed since the
>> color associated to one of the events can not be generated.
>> This create an error file which is wrongly interpret by the node of the
>> compilation like a no phase-space.
>>
>> So looks like they are still one case where the epsilon_ijk structure is
>> not handle in full generality.
>> I will look at that.
>>
>> Cheers,
>>
>> Olivier
>>
>> --
>> You received this bug notification because you are subscribed to the bug
>> report.
>> https://bugs.launchpad.net/bugs/1493832
>>
>> Title:
>> Phase space problem
>>
>> Status in MadGraph5_aMC@NLO:
>> New
>>
>> Bug description:
>> Greetings,
>>
>> When i try to generate this process listed above, the one with p p > tp
>> tp~ > z t z t~ > ... is said to not have enough phase space available and
>> tells me to check mass spectrum. But when I generate that process alone, no
>> such problem arises. And at the event generation, the following problem is
>> shown:
>> IOError: [Errno 2] No such file or directory:
>> '/home/tdvale/VLQ/LH_RH/MG5xProtos/TT/TT_1TeV/SubProcesses/P0_gg_ztztx_z_ll_t_wpb_wp_lvl_z_ll_tx_wmbx_wm_lvl/G1/results.dat'
>>
>> This error does not happen when the process is generated alone.
>>
>> The whole process list is the following:
>>
>> generate p p > tp tp~ > h t h t~, (t > w+ b, w+ > l+ vl), (t~ > w- b~,\
>> w- > l- vl~)
>> add process p p > tp tp~ > h t z t~, (t > w+ b, w+ > l+ vl),( t~ > w- \
>> b~, w- > l- vl~), z > l+ l-
>> add process p p > tp tp~ > h t w- b~, (t > w+ b, w+ > l+ vl), w- > l- \
>> vl~
>> add process p p > tp tp~ > z t h t~, (t > w+ b, w+ > l+ vl), (t~ > w- \
>> b~, w- > l- vl~), z > l+ l-
>> add process p p > tp tp~ > z t z t~, (t > w+ b, w+ > l+ vl), (t~ > w- \
>> b~, w- > l- vl~), z > l+ l-
>> add process p p > tp tp~ > z t w- b~, (t > w+ b, w+ > l+ vl), z > l+ l\
>> -, w- > l- vl~
>> add process p p > tp tp~ > w+ b h t~, (t~ > w- b~, w- > l- vl~), w+ >\
>> l+ vl
>> add process p p > tp tp~ > w+ b z t~, (t~ > w- b~, w- > l- vl~), w+ >\
>> l+ vl, z > l+ l-
>> add process p p > tp tp~ > w+ b w- b~, w+ > l+ vl, w- > l- vl~
>>
>> The UFO Model I am using is the one in this link:
>> http://feynrules.irmp.ucl.ac.be/wiki/VLQ
>>
>> Thank you.
>>
>> To manage notifications about this bug go to:
>> https://bugs.launchpad.net/mg5amcnlo/+bug/1493832/+subscriptions
>>
>
> --
> You received this bug notification because you are subscribed to
> MadGraph5_aMC@NLO.
> https://bugs.launchpad.net/bugs/1493832
>
> Title:
> Phase space problem
>
> Status in MadGraph5_aMC@NLO:
> New
>
> Bug description:
> Greetings,
>
> When i try to generate this process listed above, the one with p p > tp tp~ > z t z t~ > ... is said to not have enough phase space available and tells me to check mass spectrum. But when I generate that process alone, no such problem arises. And at the event generation, the following problem is shown:
> IOError: [Errno 2] No such file or directory: '/home/tdvale/VLQ/LH_RH/MG5xProtos/TT/TT_1TeV/SubProcesses/P0_gg_ztztx_z_ll_t_wpb_wp_lvl_z_ll_tx_wmbx_wm_lvl/G1/results.dat'
>
> This error does not happen when the process is generated alone.
>
> The whole process list is the following:
>
> generate p p > tp tp~ > h t h t~, (t > w+ b, w+ > l+ vl), (t~ > w- b~,\
> w- > l- vl~)
> add process p p > tp tp~ > h t z t~, (t > w+ b, w+ > l+ vl),( t~ > w- \
> b~, w- > l- vl~), z > l+ l-
> add process p p > tp tp~ > h t w- b~, (t > w+ b, w+ > l+ vl), w- > l- \
> vl~
> add process p p > tp tp~ > z t h t~, (t > w+ b, w+ > l+ vl), (t~ > w- \
> b~, w- > l- vl~), z > l+ l-
> add process p p > tp tp~ > z t z t~, (t > w+ b, w+ > l+ vl), (t~ > w- \
> b~, w- > l- vl~), z > l+ l-
> add process p p > tp tp~ > z t w- b~, (t > w+ b, w+ > l+ vl), z > l+ l\
> -, w- > l- vl~
> add process p p > tp tp~ > w+ b h t~, (t~ > w- b~, w- > l- vl~), w+ >\
> l+ vl
> add process p p > tp tp~ > w+ b z t~, (t~ > w- b~, w- > l- vl~), w+ >\
> l+ vl, z > l+ l-
> add process p p > tp tp~ > w+ b w- b~, w+ > l+ vl, w- > l- vl~
>
> The UFO Model I am using is the one in this link:
> http://feynrules.irmp.ucl.ac.be/wiki/VLQ
>
> Thank you.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/mg5amcnlo/+bug/1493832/+subscriptions