English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Many high-energy physics analyses require the presence of leptons from $W$,$Z$, or $H$ boson decay. For these analyses, signatures that mimic such leptonspresent a `fake lepton' background that must be estimated. Since the magnitudeof this background depends strongly upon details of the detector response, itcan be difficult to estimate with simulation. One data-driven approach is the`matrix method', in which two categories of leptons are defined (`loose' and`tight'), with the tight category being a subset of the loose category. Usingthe populations of leptons in each category in the analysis sample, and theefficiencies for both real and fake leptons in the loose category to satisfythe criteria for the tight category, the fake background yield can beestimated. This paper describes a Poisson likelihood implementation of thematrix method, which provides a more precise, reliable, and robust estimate ofthe fake background yield compared to an analytic solution. This implementationalso provides a reliable estimate of the background for cases in which theanalysis selection permits more loose leptons than tight leptons, potentiallyallowing for greater selection efficiency.

A Poisson likelihood approach to fake lepton estimation with the matrix method