SAIP2019

Fake lepton background estimation in $H \to Sh \to e^{\pm}\mu^{\mp} + $jets with ATLAS detector

Not scheduled

2h

Protea The Ranch Hotel (Polokwane)

Poster Presentation Track B - Nuclear, Particle and Radiation Physics Poster Session 1

Speaker

Mr Lehumo Mashishi (University of Witwatersrand)

Description

The estimation of fake lepton background is presented for the physics beyond the Standard Model search in the final state with a pair of different flavor opposite-sign leptons, $e\mu$, accompanied by at least two jets. The search uses the LHC full run-2 data recorded at center-of-mass-energy 13~TeV recorded with the ATLAS detector, with the corresponding luminosity of 139 fb$^{-1}$. The search extends the standard model by introducing the hypothetical scalar, $H$, and the additional Higgs-like scalar, $S$. One of the challenges in most physics analysis is to estimate background processes that can enter the signal region and be misidentified as the signal. This paper focuses on the $W$+jets background which enters the signal region. From the $W$+jets background process, there is one real lepton from $W$ and one fake which originate from the jet misidentified as a lepton. In the $H \to Sh \to e^{\pm}\mu^{\mp} + $jets analysis, the fake factor method is used for fake estimation.

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

MSc