2hdm simulation: problem with decay chains

Asked by Sabine Kraml on 2018-02-06

Hi,

I want to simulate p p > h3, h3 > h1 z, h1 > a a (or some other h1 decay mode) in two-Higgs doublet models. On https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/Models I found that the 2hdm is available only as a MadGraph4 model, so I downloaded and installed MG_ME_V4.5.2.

Following the instructions in the README file and using 2hdm_full, I can generate p p > h3, h3 > h1 z or p p > h3 > h1 z alright. But as soon as I try to add a h1 decay, the program reports "No diagrams for this process".

What am I doing wrong?

By the way, I also tried the process generation via the web interface, where one can still chose 2HDM, but it ends in a bunch of errors.

Hope you can help,
Sabine

Question information

Language:
English Edit question
Status:
Open
For:
MadGraph5_aMC@NLO Edit question
Assignee:
No assignee Edit question
Last query:
2018-02-06
Last reply:
2018-02-06

Hi Sabine,

Actually MadGraph4 models are still compatible with (most of the functionality of) MG5aMC.
So I would not advise you to use MG_ME for such computation (and I will not provide any support for that version of the code).

Now 2HDM model also exists in UFO.
If you have the latest version of the code,
you can do
import model 2HDM
or
import model 2HDMtII_NLO
and MG5aMC will automatically download the associate model from the FeynRules server.

Cheers,

Olivier

PS: Note that we plan to drop the support of MadGraph4 model inside MG5aMC in a near future.
PPS: Note that the decay of h1 into photon might not be included by default.

> On 6 Feb 2018, at 14:52, Sabine Kraml <email address hidden> wrote:
>
> New question #664139 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/664139
>
> Hi,
>
> I want to simulate p p > h3, h3 > h1 z, h1 > a a (or some other h1 decay mode) in two-Higgs doublet models. On https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/Models I found that the 2hdm is available only as a MadGraph4 model, so I downloaded and installed MG_ME_V4.5.2.
>
> Following the instructions in the README file and using 2hdm_full, I can generate p p > h3, h3 > h1 z or p p > h3 > h1 z alright. But as soon as I try to add a h1 decay, the program reports "No diagrams for this process".
>
> What am I doing wrong?
>
> By the way, I also tried the process generation via the web interface, where one can still chose 2HDM, but it ends in a bunch of errors.
>
> Hope you can help,
> Sabine
>
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Sabine Kraml (sabine-kraml) said : #2

Hi,

I have MG5_aMC_v2_6_0 and MG5_aMC_v2_6_1. In v2_6_0, there is a 2HDM
model, but it did not work (and indeed it does not include an
effective h-gamma-gamma vertex). v2_6_1 does not have any 2HDM model
any more. That's why I resorted to MG_ME.

Will try whether the automatic model download which you mention works.
But then, why does the generation on the MG5aNLO webpage not work?

Cheers, Sabine

On Tue, Feb 6, 2018 at 3:13 PM, Olivier Mattelaer
<email address hidden> wrote:
> Your question #664139 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/664139
>
> Status: Open => Answered
>
> Olivier Mattelaer proposed the following answer:
> Hi Sabine,
>
> Actually MadGraph4 models are still compatible with (most of the functionality of) MG5aMC.
> So I would not advise you to use MG_ME for such computation (and I will not provide any support for that version of the code).
>
> Now 2HDM model also exists in UFO.
> If you have the latest version of the code,
> you can do
> import model 2HDM
> or
> import model 2HDMtII_NLO
> and MG5aMC will automatically download the associate model from the FeynRules server.
>
> Cheers,
>
> Olivier
>
>
> PS: Note that we plan to drop the support of MadGraph4 model inside MG5aMC in a near future.
> PPS: Note that the decay of h1 into photon might not be included by default.
>
>> On 6 Feb 2018, at 14:52, Sabine Kraml <email address hidden> wrote:
>>
>> New question #664139 on MadGraph5_aMC@NLO:
>> https://answers.launchpad.net/mg5amcnlo/+question/664139
>>
>> Hi,
>>
>> I want to simulate p p > h3, h3 > h1 z, h1 > a a (or some other h1 decay mode) in two-Higgs doublet models. On https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/Models I found that the 2hdm is available only as a MadGraph4 model, so I downloaded and installed MG_ME_V4.5.2.
>>
>> Following the instructions in the README file and using 2hdm_full, I can generate p p > h3, h3 > h1 z or p p > h3 > h1 z alright. But as soon as I try to add a h1 decay, the program reports "No diagrams for this process".
>>
>> What am I doing wrong?
>>
>> By the way, I also tried the process generation via the web interface, where one can still chose 2HDM, but it ends in a bunch of errors.
>>
>> Hope you can help,
>> Sabine
>>
>>
>> --
>> You received this question notification because you are an answer
>> contact for MadGraph5_aMC@NLO.
>
> --
> If this answers your question, please go to the following page to let us
> know that it is solved:
> https://answers.launchpad.net/mg5amcnlo/+question/664139/+confirm?answer_id=0
>
> If you still need help, you can reply to this email or go to the
> following page to enter your feedback:
> https://answers.launchpad.net/mg5amcnlo/+question/664139
>
> You received this question notification because you asked the question.

--
_______________________________________________________
Sabine Kraml - <email address hidden> - www.kraml.net

LPSC
53 Av des Martyrs
38026 Grenoble
France
(+33)(0)4 76 28 40 52

Hi,

The auto-download of 2HDM in 2.6.1 should in principle provides the same model as the on present in 2.6.0

Otherwise, did you put correctly the paranthesis?

>>> p p > h3, h3 > h1 z, h1 > a a
is indeed not valid. You should use:

>>> p p > h3, ( h3 > h1 z, h1 > a a)

otherwise the h1 decay is expected to come from the production p p > h3

Cheers,

Olivier

> On 6 Feb 2018, at 17:27, Sabine Kraml <email address hidden> wrote:
>
> Question #664139 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/664139
>
> Status: Answered => Open
>
> Sabine Kraml is still having a problem:
> Hi,
>
> I have MG5_aMC_v2_6_0 and MG5_aMC_v2_6_1. In v2_6_0, there is a 2HDM
> model, but it did not work (and indeed it does not include an
> effective h-gamma-gamma vertex). v2_6_1 does not have any 2HDM model
> any more. That's why I resorted to MG_ME.
>
> Will try whether the automatic model download which you mention works.
> But then, why does the generation on the MG5aNLO webpage not work?
>
> Cheers, Sabine
>
>
> On Tue, Feb 6, 2018 at 3:13 PM, Olivier Mattelaer
> <email address hidden> wrote:
>> Your question #664139 on MadGraph5_aMC@NLO changed:
>> https://answers.launchpad.net/mg5amcnlo/+question/664139
>>
>> Status: Open => Answered
>>
>> Olivier Mattelaer proposed the following answer:
>> Hi Sabine,
>>
>> Actually MadGraph4 models are still compatible with (most of the functionality of) MG5aMC.
>> So I would not advise you to use MG_ME for such computation (and I will not provide any support for that version of the code).
>>
>> Now 2HDM model also exists in UFO.
>> If you have the latest version of the code,
>> you can do
>> import model 2HDM
>> or
>> import model 2HDMtII_NLO
>> and MG5aMC will automatically download the associate model from the FeynRules server.
>>
>> Cheers,
>>
>> Olivier
>>
>>
>> PS: Note that we plan to drop the support of MadGraph4 model inside MG5aMC in a near future.
>> PPS: Note that the decay of h1 into photon might not be included by default.
>>
>>> On 6 Feb 2018, at 14:52, Sabine Kraml <email address hidden> wrote:
>>>
>>> New question #664139 on MadGraph5_aMC@NLO:
>>> https://answers.launchpad.net/mg5amcnlo/+question/664139
>>>
>>> Hi,
>>>
>>> I want to simulate p p > h3, h3 > h1 z, h1 > a a (or some other h1 decay mode) in two-Higgs doublet models. On https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/Models I found that the 2hdm is available only as a MadGraph4 model, so I downloaded and installed MG_ME_V4.5.2.
>>>
>>> Following the instructions in the README file and using 2hdm_full, I can generate p p > h3, h3 > h1 z or p p > h3 > h1 z alright. But as soon as I try to add a h1 decay, the program reports "No diagrams for this process".
>>>
>>> What am I doing wrong?
>>>
>>> By the way, I also tried the process generation via the web interface, where one can still chose 2HDM, but it ends in a bunch of errors.
>>>
>>> Hope you can help,
>>> Sabine
>>>
>>>
>>> --
>>> You received this question notification because you are an answer
>>> contact for MadGraph5_aMC@NLO.
>>
>> --
>> If this answers your question, please go to the following page to let us
>> know that it is solved:
>> https://answers.launchpad.net/mg5amcnlo/+question/664139/+confirm?answer_id=0
>>
>> If you still need help, you can reply to this email or go to the
>> following page to enter your feedback:
>> https://answers.launchpad.net/mg5amcnlo/+question/664139
>>
>> You received this question notification because you asked the question.
>
>
> --
> _______________________________________________________
> Sabine Kraml - <email address hidden> - www.kraml.net
>
> LPSC
> 53 Av des Martyrs
> 38026 Grenoble
> France
> (+33)(0)4 76 28 40 52
>
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Sabine Kraml (sabine-kraml) said : #4

Hi,

I had tried various versions of writing the process, including p p >
h3 > h1 z, (h1 > a a)
but not the syntax you suggest. Will try again. Thanks!

Have a good evening,
Sabine

On Tue, Feb 6, 2018 at 6:22 PM, Olivier Mattelaer
<email address hidden> wrote:
> Your question #664139 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/664139
>
> Status: Open => Answered
>
> Olivier Mattelaer proposed the following answer:
> Hi,
>
> The auto-download of 2HDM in 2.6.1 should in principle provides the same
> model as the on present in 2.6.0
>
> Otherwise, did you put correctly the paranthesis?
>
>>>> p p > h3, h3 > h1 z, h1 > a a
> is indeed not valid. You should use:
>
>>>> p p > h3, ( h3 > h1 z, h1 > a a)
>
> otherwise the h1 decay is expected to come from the production p p > h3
>
> Cheers,
>
> Olivier
>
>
>> On 6 Feb 2018, at 17:27, Sabine Kraml <email address hidden> wrote:
>>
>> Question #664139 on MadGraph5_aMC@NLO changed:
>> https://answers.launchpad.net/mg5amcnlo/+question/664139
>>
>> Status: Answered => Open
>>
>> Sabine Kraml is still having a problem:
>> Hi,
>>
>> I have MG5_aMC_v2_6_0 and MG5_aMC_v2_6_1. In v2_6_0, there is a 2HDM
>> model, but it did not work (and indeed it does not include an
>> effective h-gamma-gamma vertex). v2_6_1 does not have any 2HDM model
>> any more. That's why I resorted to MG_ME.
>>
>> Will try whether the automatic model download which you mention works.
>> But then, why does the generation on the MG5aNLO webpage not work?
>>
>> Cheers, Sabine
>>
>>
>> On Tue, Feb 6, 2018 at 3:13 PM, Olivier Mattelaer
>> <email address hidden> wrote:
>>> Your question #664139 on MadGraph5_aMC@NLO changed:
>>> https://answers.launchpad.net/mg5amcnlo/+question/664139
>>>
>>> Status: Open => Answered
>>>
>>> Olivier Mattelaer proposed the following answer:
>>> Hi Sabine,
>>>
>>> Actually MadGraph4 models are still compatible with (most of the functionality of) MG5aMC.
>>> So I would not advise you to use MG_ME for such computation (and I will not provide any support for that version of the code).
>>>
>>> Now 2HDM model also exists in UFO.
>>> If you have the latest version of the code,
>>> you can do
>>> import model 2HDM
>>> or
>>> import model 2HDMtII_NLO
>>> and MG5aMC will automatically download the associate model from the FeynRules server.
>>>
>>> Cheers,
>>>
>>> Olivier
>>>
>>>
>>> PS: Note that we plan to drop the support of MadGraph4 model inside MG5aMC in a near future.
>>> PPS: Note that the decay of h1 into photon might not be included by default.
>>>
>>>> On 6 Feb 2018, at 14:52, Sabine Kraml <email address hidden> wrote:
>>>>
>>>> New question #664139 on MadGraph5_aMC@NLO:
>>>> https://answers.launchpad.net/mg5amcnlo/+question/664139
>>>>
>>>> Hi,
>>>>
>>>> I want to simulate p p > h3, h3 > h1 z, h1 > a a (or some other h1 decay mode) in two-Higgs doublet models. On https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/Models I found that the 2hdm is available only as a MadGraph4 model, so I downloaded and installed MG_ME_V4.5.2.
>>>>
>>>> Following the instructions in the README file and using 2hdm_full, I can generate p p > h3, h3 > h1 z or p p > h3 > h1 z alright. But as soon as I try to add a h1 decay, the program reports "No diagrams for this process".
>>>>
>>>> What am I doing wrong?
>>>>
>>>> By the way, I also tried the process generation via the web interface, where one can still chose 2HDM, but it ends in a bunch of errors.
>>>>
>>>> Hope you can help,
>>>> Sabine
>>>>
>>>>
>>>> --
>>>> You received this question notification because you are an answer
>>>> contact for MadGraph5_aMC@NLO.
>>>
>>> --
>>> If this answers your question, please go to the following page to let us
>>> know that it is solved:
>>> https://answers.launchpad.net/mg5amcnlo/+question/664139/+confirm?answer_id=0
>>>
>>> If you still need help, you can reply to this email or go to the
>>> following page to enter your feedback:
>>> https://answers.launchpad.net/mg5amcnlo/+question/664139
>>>
>>> You received this question notification because you asked the question.
>>
>>
>> --
>> _______________________________________________________
>> Sabine Kraml - <email address hidden> - www.kraml.net
>>
>> LPSC
>> 53 Av des Martyrs
>> 38026 Grenoble
>> France
>> (+33)(0)4 76 28 40 52
>>
>> You received this question notification because you are an answer
>> contact for MadGraph5_aMC@NLO.
>
> --
> If this answers your question, please go to the following page to let us
> know that it is solved:
> https://answers.launchpad.net/mg5amcnlo/+question/664139/+confirm?answer_id=2
>
> If you still need help, you can reply to this email or go to the
> following page to enter your feedback:
> https://answers.launchpad.net/mg5amcnlo/+question/664139
>
> You received this question notification because you asked the question.

--
_______________________________________________________
Sabine Kraml - <email address hidden> - www.kraml.net

LPSC
53 Av des Martyrs
38026 Grenoble
France
(+33)(0)4 76 28 40 52

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