MassList, WidthList and all that

MassList

MassList is a list of length 2, whose entries are

1. The BlockName MASS for masses
2. A matrix: in each row you find
   1. The pdg code of the particle (between curly brackets)
   2. The symbol for the mass.
   3. The numerival value ( Internal if the mass if given as an internal parameter, and NoValue[1] if no value is specified in the model file.

Notice that massless particles are not shown in MassList.

WidthList

Similar to MassList, except that the first element is the BlockName DECAY. Notice that stable particles (Γ0) are not shown in =WidthList.

!EParamList

EParamList is a list containing all external parameters defined in the model file. Each element of this list is a two-component list, corresponding to a LH block:

1. The first element is the LH block
2. The second element is a list containing all the parameters in this block.

Each parameter is given as a list:

1. The LH block number (between curly brackets)
2. A list of length 4 or 6 giving all the properties of the parameter.

If no InteractionOrder was specified for this parameter, then the length of the list is 4:

1. The ParameterName of the parameter.
2. the numerical value
3. True/False, specifying whether the parameter is complex ( True) or not ( False).
4. a string, giving a description of the parameter.

If an InteractionOrder was defined, then the length of the list is 6

1. The ParameterName of the parameter.
2. The name of the InteractionOrder (usually QED/QCD)
3. The value of the interaction order.
4. the numerical value
5. True/False, specifying whether the parameter is complex ( True) or not ( False).
6. a string, giving a description of the parameter.

!IParamList

IParamList is a list containing all internal parameter defined in the model file. Each parameter is represented by a four or six component list:

• Is no InteractionOrder was defined for the parameter, then the length of the list is 4:

1. The ParameterName of the parameter.
2. The name of the InteractionOrder (usually QED/QCD)
3. The value of the interaction order.
4. the relation to other parametes (external and/or internal)
5. True/False, specifying whether the parameter is complex ( True) or not ( False).
6. a string, giving a description of the parameter.

• If an InteractionOrder was defined, then the length of the list is 6:

1. The ParameterName of the parameter.
2. the relation to other parametes (external and/or internal)
3. True/False, specifying whether the parameter is complex ( True) or not ( False).
4. a string, giving a description of the parameter.

ParamList

ParamList is a list containing both the external parameters.

Each external parameter corresponds to a six or eight component list. If no interaction order was defined

1. The ParameterName of the parameter.
2. A tag Ext.
3. The numerical value
4. The LH block name.
5. True/False, specifying whether the parameter is complex ( True) or not ( False).
6. a string, giving a description of the parameter.

If an interaction order was defined

1. The ParameterName of the parameter.
2. A tag Ext.
3. The numerical value.
4. The LH block name.
5. The name of the InteractionOrder (usually QED/QCD)
6. The value of the interaction order.
7. True/False, specifying whether the parameter is complex ( True) or not ( False).
8. A string, giving a description of the parameter.

Each internal parameter corresponds to a five or seven eight component list. If no interaction order was defined

1. The ParameterName of the parameter.
2. A tag Int.
3. The relation to other parametes (external and/or internal).
4. True/False, specifying whether the parameter is complex ( True) or not ( False).
5. A string, giving a description of the parameter. If an interaction order was defined
6. The ParameterName of the parameter.
7. A tag Int.
8. The relation to other parametes (external and/or internal).
9. The name of the InteractionOrder (usually QED/QCD)
10. The value of the interaction order.
11. True/False, specifying whether the parameter is complex ( True) or not ( False).
12. A string, giving a description of the parameter.

-- Main.ClaudeDuhr - 19 Mar 2008