| 32 | | value = 'HeavTheta(MH - P(-1,1)*P(-1,3),-2*MH*,MH)') |
| 33 | | }}} |
| 34 | | |
| 35 | | 1. HeavTheta is a special function for a IF statement. If the first argument is positive then the function is equal to the second argument otherwise the function is equal to the third argument. |
| 36 | | 2. Any parameter of the model can be used inside the 'value' expression |
| 37 | | 3. You can use any type of object define in the ALOHA syntax (see the [ALOHA paper http://arxiv.org/abs/arXiv:1108.2041] for the convention). This includes the momenta P(x,y). This first index is the lorentz index which should be contracted, while the second index refers to the particle ordering of the vertex. |
| 38 | | 4. If you need to add an additional parameter in your model, you can do it in the parameters.py file. |
| | 32 | value = '(-2*MH if MH - P(-1,1)*P(-1,3) > 0 else MH)' |
| | 33 | }}} |
| | 34 | |
| | 35 | 1. Any parameter of the model can be used inside the 'value' expression |
| | 36 | 2. You can use any type of object define in the ALOHA syntax (see the [ALOHA paper http://arxiv.org/abs/arXiv:1108.2041] for the convention). This includes the momenta P(x,y). This first index is the lorentz index which should be contracted, while the second index refers to the particle ordering of the vertex. |
| | 37 | 3. If you need to add an additional parameter in your model, you can do it in the parameters.py file. |
