Calibration of the light-flavour jet mistagging efficiency of the b-tagging algorithms with Z+jets events using 139 fb-1 of ATLAS proton-proton collision data at SQUARE ROOTs = 13 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476599" target="_blank" >RIV/00216208:11320/23:10476599 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=JV40j8Gk9p" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=JV40j8Gk9p</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-023-11736-z" target="_blank" >10.1140/epjc/s10052-023-11736-z</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Calibration of the light-flavour jet mistagging efficiency of the b-tagging algorithms with Z+jets events using 139 fb-1 of ATLAS proton-proton collision data at SQUARE ROOTs = 13 TeV

Popis výsledku v původním jazyce

The identification of b-jets, referred to as btagging,is an important part of many physics analyses inthe ATLAS experiment at the Large Hadron Collider and anaccurate calibration of its performance is essential for highqualityphysics results. This publication describes the calibrationof the light-flavour jet mistagging efficiency in a datasample of proton-proton collision events atSQUARE ROOTs = 13 TeVcorresponding to an integrated luminosity of 139 fb-1. Thecalibration is performed in a sample of Z bosons produced inassociationwith jets.Due to the lowmistagging efficiency forlight-flavour jets, a method which uses modified versions ofthe b-tagging algorithms referred to as flip taggers is used inthis work. A fit to the jet-flavour-sensitive secondary-vertexmass is performed to extract a scale factor from data, to correctthe light-flavour jetmistagging efficiency inMonteCarlosimulations, while simultaneously correcting the b-jet efficiency.With this procedure, uncertainties coming from themodeling of jets from heavy-flavour hadrons are considerablylower than in previous calibrations of the mistaggingscale factors, where they were dominant. The scale factorsobtained in this calibration are consistent with unity withinuncertainties.

Název v anglickém jazyce

Calibration of the light-flavour jet mistagging efficiency of the b-tagging algorithms with Z+jets events using 139 fb-1 of ATLAS proton-proton collision data at SQUARE ROOTs = 13 TeV

Popis výsledku anglicky

The identification of b-jets, referred to as btagging,is an important part of many physics analyses inthe ATLAS experiment at the Large Hadron Collider and anaccurate calibration of its performance is essential for highqualityphysics results. This publication describes the calibrationof the light-flavour jet mistagging efficiency in a datasample of proton-proton collision events atSQUARE ROOTs = 13 TeVcorresponding to an integrated luminosity of 139 fb-1. Thecalibration is performed in a sample of Z bosons produced inassociationwith jets.Due to the lowmistagging efficiency forlight-flavour jets, a method which uses modified versions ofthe b-tagging algorithms referred to as flip taggers is used inthis work. A fit to the jet-flavour-sensitive secondary-vertexmass is performed to extract a scale factor from data, to correctthe light-flavour jetmistagging efficiency inMonteCarlosimulations, while simultaneously correcting the b-jet efficiency.With this procedure, uncertainties coming from themodeling of jets from heavy-flavour hadrons are considerablylower than in previous calibrations of the mistaggingscale factors, where they were dominant. The scale factorsobtained in this calibration are consistent with unity withinuncertainties.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

1434-6052

Svazek periodika

83

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

30

Strana od-do

728

Kód UT WoS článku

001062397300002

EID výsledku v databázi Scopus

2-s2.0-85168617206