APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Banerjee Shankha (Harish-Chandra Research Institute)
Title: Heavy Higgs searches in a Higgs-portal B-L Model
Date (JST): Fri, Sep 04, 2015, 13:30 - 14:30
Place: Seminar Room A
Related File: 1513.pdf
Abstract: In this talk I will discuss the discovery prospects of a heavy neutral scalar arising from a U(1)_{B−L} extension of the Standard Model during the Large Hadron Collider's high luminosity runs (HL-LHC). This heavy neutral scalar mixes with the SM Higgs boson through a Higgs portal and interacts with the SM particles with an interaction strength proportional to the sine of the mixing angle. The mixing between the two Higgs bosons is constrained by direct and indirect measurements. I will mainly focus on the ZZ and WW decay modes of the heavy Higgs boson. For the ZZ case, I will discuss the cleanest 4l and 2l 2j final states and show that a heavy Higgs boson of mass smaller than 500 GeV can be discovered at the HL-LHC. For the WW decay mode, I will discuss the ljj MET signature. Here I will show novel background reduction techniques for tackling the huge background using both cut-based and multivariate analyses.