2021/10/06 by Atri Dey, Dey, Atri, Tousik Samui +1
Physics and Astronomy · Computer Science · #Particle physics theoretical and experimental studies #High-Energy Particle Collisions Research #Computational Physics and Python Applications
paper · pdf · doi:10.48550/arxiv.2110.02773
Study of polarization of heavy particles is an important branch of research in today's collider studies. The massive W boson has two types of polarization states, which usually are studied via the angular distribution of its decay products. We have studied polarization of hadronic and boosted W boson using jet substructure technique at 14 TeV LHC. Two different methods, viz. N-subjettiness and Soft Drop, were used to find the subjets, which are approximately considered to be the two hadronic decay products of W, inside boosted W jets. These subjets were then used to find the distribution of pθ and zj to prepare the templates of longitudinally and transversely polarized W. We then used these templates to find the fractions of different W polarization in a mixed sample to a relatively good accuracy.