Measurement of the tt¯production cross-section using eμ events with b-tagged jets in ppcollisions at √s = 13 TeV with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00484449" target="_blank" >RIV/68378271:_____/16:00484449 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.physletb.2016.08.019" target="_blank" >http://dx.doi.org/10.1016/j.physletb.2016.08.019</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2016.08.019" target="_blank" >10.1016/j.physletb.2016.08.019</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of the tt¯production cross-section using eμ events with b-tagged jets in ppcollisions at √s = 13 TeV with the ATLAS detector

Popis výsledku v původním jazyce

This paper describes a measurement of the inclusive top quark pair production cross-section ( σtt¯ ) with a data sample of 3.2fb−1 of proton–proton collisions at a centre-of-mass energy of $sqrt s%=13TeV , collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron–muon pair in the final state. Jets containing b -quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b -tagged jets are counted and used to determine simultaneously σtt¯ and the efficiency to reconstruct and b -tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be: σtt¯=818±8(stat)±27(syst)±19(lumi)±12(beam) pb, where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4%.nnn

Název v anglickém jazyce

Measurement of the tt¯production cross-section using eμ events with b-tagged jets in ppcollisions at √s = 13 TeV with the ATLAS detector

Popis výsledku anglicky

This paper describes a measurement of the inclusive top quark pair production cross-section ( σtt¯ ) with a data sample of 3.2fb−1 of proton–proton collisions at a centre-of-mass energy of $sqrt s%=13TeV , collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron–muon pair in the final state. Jets containing b -quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b -tagged jets are counted and used to determine simultaneously σtt¯ and the efficiency to reconstruct and b -tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be: σtt¯=818±8(stat)±27(syst)±19(lumi)±12(beam) pb, where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4%.nnn

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Physics Letters. B

ISSN

0370-2693

e-ISSN

—

Svazek periodika

761

Číslo periodika v rámci svazku

Oct

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

22

Strana od-do

136-157

Kód UT WoS článku

000384469900023

EID výsledku v databázi Scopus

2-s2.0-84983541807