NLO QCD for tth process with 5flav scheme

Dear Oliver,

I have tried with the model : "loop_sm-no_b_mass"; which works fine now. But I couldn't understand why m_b=0 has solved the problem with 5flav scheme ! Can you explain this issue ?

I also tried to switch on "madspin" now but I had issues as follow (This refers to my Q2 above):

Command "launch auto " interrupted with error:
InvalidCmd : "define" command requires symbols "=" at the second position

I have refer to : https://answers.launchpad.net/mg5amcnlo/+question/661988
but unable to get the latest 2.6.2.

Thanks,
Subhasish

Hi,

I'm not working today,
so I will just give you the following link:
https://bazaar.launchpad.net/~mg5core1/mg5amcnlo/2.6.2/revision/322
where you can find a tar ball with (I hope) the full code.

Cheers,

Olivier

Thanks Oliver,

Now after generating process in the new version : https://bazaar.launchpad.net/~mg5core1/mg5amcnlo/2.6.2/revision/322

I got the following error :

INFO: generate add process p p > t t~ h, (t~ > b~ w- , w- > all all QCD=99), (t > b w+ , w+ > all all QCD=99) --no_warning=duplicate;define pert_QCD = -5 -4 -3 -2 -1 1 2 3 4 5 21;add process add process p p > t t~ h pert_QCD, (t~ > b~ w- , w- > all all QCD=99), (t > b w+ , w+ > all all QCD=99) --no_warning=duplicate;
Command "launch auto " interrupted with error:
InvalidCmd : No particle add in model
quit
INFO:

MG5_aMC>

Thanks,
Subhasish

Dear Oliver,

Please ignore my post at #3.

The problem is solved with the new version6.2.2.

Thanks,
Subhasish

Dear Oliver,

Please ignore my post at #3.

The problem is solved with the new version6.2.2.

Thanks,
Subhasish

Dear Oliver,

I am having the following issue now :

INFO: generate p p > t t~ h, (t~ > b~ w- , w- > j j QCD=99), h > b b~ QCD=99, (t > b w+ , w+ > l+ vl QCD=99) --no_warning=duplicate;define pert_QCD = -5 -4 -3 -2 -1 1 2 3 4 5 21;add process p p > t t~ h pert_QCD, (t~ > b~ w- , w- > j j QCD=99), h > b b~ QCD=99, (t > b w+ , w+ > l+ vl QCD=99) --no_warning=duplicate;
Command "launch auto " interrupted with error:
NoDiagramException : No amplitudes generated from process Process: h > b b~ WEIGHTED=4. Please enter a valid process
Please report this bug on https://bugs.launchpad.net/mg5amcnlo
More information is found in '/home/subhasish153.local/RESEARCH/EVENT_GENERATORS/MADGRAPH5/TEST_MG5_aMC_v2_6_2/pp2tth_all_qcd_5flav/run_01_tag_1_debug.log'.
Please attach this file to your report.
quit
INFO:
MG5_aMC>*************************
A coding exception was thrown and uncaught in a Task.

Full message: TypeError: NetworkError when attempting to fetch resource.
Full stack: loadFile@resource://gre/modules/services-common/blocklist-clients.js:119:30
TaskImpl_run@resource://gre/modules/Task.jsm:319:42
TaskImpl@resource://gre/modules/Task.jsm:277:3
asyncFunction@resource://gre/modules/Task.jsm:252:14
Task_spawn@resource://gre/modules/Task.jsm:166:12
loadDumpFile@resource://gre/modules/services-common/blocklist-clients.js:118:12
syncCollection@resource://gre/modules/services-common/blocklist-clients.js:212:39
TaskImpl_run@resource://gre/modules/Task.jsm:319:42

*************************

MG5_aMC>

Thanks,
Subhasish

Hi,

Not sure if this can be done or not inside that model. (this needs a specific handling or the yukawa mass for the renormalization).
Valentin will confirm if that model can do it or not.

Cheers,

Olivier

Dear Olivier,

The first part of execution is all right but when you pass it to madspin, it causes error.
I think we can think of a mechanism where the madspin should take the value from some other card (may be a parameter setting in the madspin_card itself, but not for all may be only for b- quark (like non zero mass to b-quark) or some NP parameters behave differently at decay level.).

Thanks,
Subhasish

Hi,

This already exists but we never check the impact of changing a mass of a particle when doing so.
But if you look at the madspin wiki page you will find such instructions.

Cheers,

Olivier