Langrangian for H-tD

Asked by Basit Ali on 2020-06-27

Hello, what shoould be the form of Lagrangian for H-tD couplings where H+ is charged Higgs and d,T are down and anti Top quarks.
The general formula for couplings is as follows
gH-qiqj = g|Vqiqj| [ mqi * cotb*(1+G5) + mqj*tb*(1-G5)] / 2*Sqrt2*Mw
 where Mqi and Mqj are corresponding quarks masses , Vqiqj is ckm matrix element and tb is ratio of vacuum expectation value.

kindly plz guide me I am really facing problem in writing up this.

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Alexander Belyaev (alexander.belyaev) said :
#1

Please
do this in analogy to the Standard Model which was implemented
in LanHEP.

See LanHEP files mdl/stand.mdl
or
CalcHEP installation folder model_arc/sm.inc

Regards,
Alexander

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