LogLikelihood
LogLikelihood defines the objective terms evaluated for each sampled point.
It appears under the Sampling block and is shared by samplers that need a likelihood or score value.
Minimal form
Sampling:
LogLikelihood:
- name: L_total
expression: "-0.5 * chi2"
Each entry contains:
name: stable name for the likelihood term.expression: symbolic expression evaluated after scan variables and workflow outputs are available.
Multiple terms
Use multiple entries when you want to keep contributions inspectable:
Sampling:
LogLikelihood:
- name: L_higgs
expression: "-0.5 * chi2_higgs"
- name: L_flavor
expression: "-0.5 * chi2_flavor"
- name: L_total
expression: "L_higgs + L_flavor"
Keep the final combined term explicitly named when downstream analysis expects a single likelihood column.
Expression inputs
Likelihood expressions can use:
- scan variables from
Sampling.Variables - calculator or opera outputs mapped into the sample record
- derived symbolic quantities documented in Symbolic Expressions