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

Search for light pseudoscalar with overlapping di-tau decays using machine learning at the CMS detector

Dec 1, 2018, 3:10 PM
Building 50 Auditorium (Lawrence Berkeley National Lab)

Building 50 Auditorium

Lawrence Berkeley National Lab


Grace Haza (University of California Davis (US))


Recent LHC searches have probed decays of the H(125) involving new light pseudoscalar bosons (a). For example, a current CMS search probes H->aa->mu mu tau tau for m(a) < 21 GeV. Because of the large mass difference between the H and the light pseudoscalar, the two taus are boosted and collimated. To improve signal acceptance for future studies, we explore the use of machine learning techniques to distinguish between overlapping di-tau decays and light QCD jets. We first investigate kinematic characteristics of hadronic tau decays compared to light QCD jets.

Session Lightning Round (5+3 min)

Primary author

Grace Haza (University of California Davis (US))

Presentation materials