Rivet: Run conditions

| Rivet 3.1.9

Functions
Run conditions

## Functions
const ParticlePair & | Rivet::Analysis::beams () const
| Incoming beams for this run.
const PdgIdPair | Rivet::Analysis::beamIds () const
| Incoming beam IDs for this run.
double | Rivet::Analysis::sqrtS () const
| Centre of mass energy for this run.
bool | Rivet::Analysis::merging () const
| Check if we are running rivet-merge.

## Detailed Description