47 citations · 103 across the 13 of their papers we have counts for
13 papers
-channel Higgs production and constraints on off-shell Higgs couplings
Li-Gang Xia
This note is to record an unsucessful idea. I tried hard to persuade myself to write this note as I have spent a significant fraction of time during this summer. For Higgs resonant…
Improved Asymptotic Formulae for Statistical Interpretation Based on Likelihood Ratio Tests
Li-Gang Xia, Yan Zhang
In this work, we attempt to refine the classic asymptotic formulae to describe the probability distribution of likelihood-ratio statistical tests. The idea is to split the probabil…
Search for Low-Mass Leptoquarks using the final states in Pb-Pb Ultra-Peripheral Collisions
Li-Gang Xia
After a review over past experiments and theoretical requirements from low-energy flavour physics, we argue that the possibility of low-mass leptoquarks (LQ) cannot be fully exclud…
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…
A theorem about two-body decay and its application for a doubly-charged boson going to
Li-Gang Xia
In a general decay chain , we prove that the angular correlation function in the decay of is irrelevant to the polarization…
Analytical Forms for Cross Sections of Di-lepton Production from Collisions around the Resonance
Xing-Yu Zhou, Ya-Di Wang, Li-Gang Xia
A detailed theoretical derivation of the cross sections of and around the resonance is reported. The resonance and interference parts…
Study of decays to the and final states
BESIII Collaboration, M. Ablikim, M. N. Achasov +407
We study the decays of the charmonium resonances and to the final states , based on a single baryon tag method usin…
A mass reconstruction technique for a heavy resonance decaying to
Li-Gang Xia
For a resonance decaying to , it is difficult to reconstruct its mass accurately because of the presence of neutrinos in the decay products of the leptons. If the reson…
Search for Flavor Changing Neutral Currents in Decay at the LHC
Xin Chen, Li-Gang Xia
The prospects of searching for the flavor changing neutral current effect in the decay of are investigated with the simulated collision data for the ATLAS…
Study of decaying to Baryon anti-Baryon Pairs
Li-Gang Xia
To study the decays of going to baryon anti-baryon pairs (), all available experiments of measuring the cross sections of at center-of-mas…