higgs decay width

Asked by Charlie on 2018-09-05

Dear MG5 Group,

I am using heft model to calculate the width of sm higgs.

but it turns out the result is not 4.07 mev, I am wondering what's the reason,

Is it the NLO effect not include?

Thanks a lot!

Best!
Xianhui

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Last query:
2018-09-05
Last reply:
2018-09-05
Charlie (xianhui) said : #1

The result is like this:

# PDG Width
DECAY 25 5.621956e-03
# BR NDA ID1 ID2 ...
   7.657121e-01 2 -5 5 # 0.00430479973487
   4.602490e-02 2 -15 15 # 0.000258749962704
   3.470500e-02 2 21 21 # 0.00019510998298
   2.306937e-02 3 -2 1 24 # 0.000129694983088
   2.306937e-02 3 -4 3 24 # 0.000129694983088
   2.283547e-02 3 -24 -1 2 # 0.000128380007579
   2.283547e-02 3 -24 -3 4 # 0.000128380007579
   7.638622e-03 3 -12 11 24 # 4.29439967846e-05
   7.638622e-03 3 -14 13 24 # 4.29439967846e-05
   7.589707e-03 3 -24 -11 12 # 4.26689988069e-05
   7.589707e-03 3 -24 -13 14 # 4.26689988069e-05
   7.549329e-03 3 -16 15 24 # 4.24419954675e-05
   7.536878e-03 3 -24 -15 16 # 4.23719964934e-05
   2.265759e-03 3 -1 1 23 # 1.27379974046e-05
   2.265759e-03 3 -3 3 23 # 1.27379974046e-05
   1.821430e-03 3 -5 5 23 # 1.02399993171e-05
   1.776873e-03 3 -2 2 23 # 9.98950182359e-06
   1.776873e-03 3 -4 4 23 # 9.98950182359e-06
   1.726125e-03 2 22 22 # 9.7041988005e-06
   1.019633e-03 3 -12 12 23 # 5.73233186215e-06
   1.019633e-03 3 -14 14 23 # 5.73233186215e-06
   1.019633e-03 3 -16 16 23 # 5.73233186215e-06
   5.073945e-04 3 -11 11 23 # 2.85254955364e-06
   5.073945e-04 3 -13 13 23 # 2.85254955364e-06
   4.989544e-04 3 -15 15 23 # 2.80509968281e-06

which the total width is not 4.07 mev

No that is a LO computation.

Cheers,

Olivier

> On 5 Sep 2018, at 21:52, Charlie <email address hidden> wrote:
>
> New question #673379 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/673379
>
> Dear MG5 Group,
>
> I am using heft model to calculate the width of sm higgs.
>
> but it turns out the result is not 4.07 mev, I am wondering what's the reason,
>
> Is it the NLO effect not include?
>
> Thanks a lot!
>
> Best!
> Xianhui
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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