| Mass constrained fitting is a technique that improves jet energy resolution. The fit is performed by assigning a well-known mass to a decaying particle and minimizing a chi2 consisting of the constituent particle's measured parameters. This technique is utilized in an abstract frame work which applies multiple constraints to arbitrary multi- generational particle topologies. The software is constructed with the ability to both fit designated particles and automate the analysis of all particle parameters post-fit, including Monte Carlo information. The energy reconstruction is tested for single and multiple constraints in the decays of J/? → mu +mu-- , pi0 → gammagamma, eta → pi +pi-- gamma, and eta → pi +pi-- pi0. |
