Neventspp
Neventspp is a variable used in particle physics to denote the effective number of proton-proton (pp) collision events in a data sample or Monte Carlo simulation. In high-energy collider analyses, pp collisions produce vast numbers of events, and Neventspp summarizes the size or normalization of the sample for a given process. It may refer to the raw count of generated events (Ngenerated) or to the sum of event weights used to scale the sample to a target luminosity and theoretical cross section.
In Monte Carlo generation workflows, a process is simulated with Ngenerated events, each assigned a weight
Neventspp is used to compute expected yields, to normalize histograms, and to compare simulation to data. It
See also: cross section, integrated luminosity, event weight, Monte Carlo simulation, data normalization.