Speaker
Description
Being able to accurately identify the Higgs boson that decays into heavy quarks is crucial for improving the measurement of the yukawa coupling to bottom quarks, and it could also lead to evidence of the yukawa coupling to c-quarks at the HL-LHC. When a high-energy Higgs boson decays, it produces two collimated jets (sub-jets) that can be reconstructed within a single largeR jet with a radius of 1.0.
To study these decays, new variables related to flavor tagging can be exploited, such as secondary vertices, as well as variables related to the parton shower, such as color variables belonging to the Lundplane. In particular, these color variables can be used to discriminate the decay of a color singlet (like the Higgs boson) into a flavor-antiflavor quarks pair from the decay of a SU(3) colored state (like the gluon) into the same final state.
The results of this tagger are presented for the first time in the rejection of Hbb/cc versus QCD.
