December 1, 2018
Lawrence Berkeley National Lab
US/Pacific timezone

Search For a Light Pseudoscalar Higgs Boson with Boosted Topologies at CMS

Dec 1, 2018, 12:50 PM
Building 50 Auditorium (Lawrence Berkeley National Lab)

Building 50 Auditorium

Lawrence Berkeley National Lab


Mengyao Shi


A search is performed for a light pseudoscalar Higgs boson (a) motivated by the theoretical framework of two higgs doublet plus singlet models (2HDM+S). This search uses 2016 LHC data collected at 13 TeV by the CMS experiment, and analyses the decay channel H->a a->mu mu tau tau, with H being either the 125 GeV state or heavier Higgs boson. Final state tau leptons feature a boosted and collimated topology due to the difference between the H and a masses. Thus, a novel algorithm for this special final state is designed to increase the identification efficiency. Expected limits are derived in the context of four types of 2HDM+S models for H(125), and are complementary to current CMS results with resolved final state particles. Model-independent expected limits for heavier H masses are also presented.

Session Thesis Presentations (30+10 min)

Primary authors

Mengyao Shi Prof. Maxwell Chertok (University of California, Davis) Dr John Gunion (University of California, Davis) Mr Redwan Habibullah (Florida State University) Mr Evan Hargett (Florida State University) Ms Grace Haza (University of California, Davis) Dr Anirban Saha (Florida State University) Dr Devin Taylor (University of California, Davis) Mr Kyle Tos (University of California, Davis) Dr Rachel Yohay (Florida State University) Dr Fengwangdong Zhang (University of California, Davis)

Presentation materials