WNPPC2025 - 62nd Winter Nuclear & Particle Physics Conference

Quantifying Charge Flips for Same-Sign WW Production: Insights from the Z→ee Channel

Not scheduled

15m

Kinnear Centre Room (KC 303) (Banff, Alberta)

Contributed Oral Physics Beyond the Standard Model Morning 4 - Particle Physics

Speaker

Damandeep Kaur

Description

Electron charge misidentification constitutes the most significant background in the ee decay channel and the third-largest background in the all-inclusive dileptonic channel in the ATLAS measurement of electroweak production of same-sign WW boson pairs in proton-proton collisions. Electrons in the ee channel are produced with well-defined opposite charges, making it an excellent process for studying charge misidentification (e.g., charge flips). By comparing the reconstructed charges of the two electrons with their expected opposite-charge configuration, the rate of charge flips can be quantified and scale factors that compensate for the differences between the data and the simulation can be derived. In my talk, I will discuss the various sources for the electron charge misidentification. Also, I will discuss the criteria for the measurement of charge mis-identification for the combinations of identification and isolation criteria followed by the derivation of the rates and scale factors.