University of Louisville
Measurement of Jet-Finding Efficiencies
Institution
University of Louisville
Faculty Advisor/ Mentor
David N. Brown
Abstract
In electron-antielectron annihilation interactions, the production of a quark-antiquark pair results in the formation of jets of matter. Using jet-finding software developed for the BaBar Experiment at the Stanford Linear Accelerator Center and a fast, standalone Monte Carlo program written at the University of Louisville, we have tested the efficiency for finding 3-jet events. We characterize the efficiency as a function of the energy of the leading jet and examine how this efficiency is affected by jet opening angle, momentum resolution, and detector acceptance. We find 3-jet efficiencies typically between 60 and 80 percent. We also find that as a function of leading jet energy, the efficiency can be characterized as a plateau for low energy and a linear drop-off at higher energy. Understanding jet-finding performance is essential to correct interpretation of measurements of Quantum Chromodynamic processes.
Measurement of Jet-Finding Efficiencies
In electron-antielectron annihilation interactions, the production of a quark-antiquark pair results in the formation of jets of matter. Using jet-finding software developed for the BaBar Experiment at the Stanford Linear Accelerator Center and a fast, standalone Monte Carlo program written at the University of Louisville, we have tested the efficiency for finding 3-jet events. We characterize the efficiency as a function of the energy of the leading jet and examine how this efficiency is affected by jet opening angle, momentum resolution, and detector acceptance. We find 3-jet efficiencies typically between 60 and 80 percent. We also find that as a function of leading jet energy, the efficiency can be characterized as a plateau for low energy and a linear drop-off at higher energy. Understanding jet-finding performance is essential to correct interpretation of measurements of Quantum Chromodynamic processes.