4 papers
F2F, a model-independent method to determine the mass and width of a particle in the presence of interference
Li-Gang Xia
It is generally believed that any particle to be discovered will have a TeV-order mass. Given its great mass, it must have a large decay width. Therefore, the interference effect w…
Understanding the boosted decision tree methods with the weak-learner approximation
Li-Gang Xia
Two popular boosted decsion tree (BDT) methods, Adaptive BDT (AdaBDT) and Gradient BDT (GradBDT) are studied in the classification problem of separating signal from background assu…
QBDT, a new boosting decision tree method with systematic uncertainties into training for High Energy Physics
Li-Gang Xia
A new boosting decision tree (BDT) method, QBDT, is proposed for the classification problem in the field of high energy physics (HEP). In many HEP researches, great efforts are mad…
Study of constraint and impact of a nuisance parameter in maximum likelihood method
Li-Gang Xia
Maximum likelihood method is widely used for parameter estimation in high energy physics. To consider various systematic uncertainties, tens of or even hundreds of nuisance paramet…