Measurement of top-quark pair production in association with charm quarks in proton-proton collisions at SQUARE ROOT𝑠 = 13 TeV with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10511255" target="_blank" >RIV/00216208:11320/25:10511255 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=-nv3Csk0os" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=-nv3Csk0os</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2024.139177" target="_blank" >10.1016/j.physletb.2024.139177</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of top-quark pair production in association with charm quarks in proton-proton collisions at SQUARE ROOT𝑠 = 13 TeV with the ATLAS detector

Popis výsledku v původním jazyce

Inclusive cross-sections for top-quark pair production in association with charm quarks are measured with proton--proton collision data at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 140 fb-1,collected with the ATLAS experiment at the LHC between 2015 and 2018. The measurements are performed byrequiring one or two charged leptons (electrons and muons), two 𝑏-tagged jets, and at least one additional jetin the final state. A custom flavor-tagging algorithm is employed for the simultaneous identficationof 𝑏-jetsand 𝑐-jets. In a fiducial phase space that replicates the acceptance of the ATLAS detector, the cross-sections for𝑡̄𝑡 + &gt;=2𝑐 and 𝑡̄𝑡 + 1𝑐 production are measured to be 1.28+0.27-0.24 pb and 6.4+1.0-0.9 pb, respectively. The measurementsare primarily limited by uncertainties in the modeling of inclusive 𝑡̄𝑡 and 𝑡̄𝑡 + 𝑏̄𝑏production, in the calibrationof the flavor-tagging algorithm, and by data statistics. Cross-section predictions from various 𝑡̄𝑡 simulations arelargely consistent with the measured cross-section values, though all underpredict the observed values by 0.5to 2.0 standard deviations. In a phase-space volume without requirements on the 𝑡̄𝑡 decay products and the jetmultiplicity, the cross-section ratios of 𝑡̄𝑡 + &gt;=2𝑐 and 𝑡̄𝑡 + 1𝑐 to total 𝑡̄𝑡 + jets production are determined to be(1.23 +- 0.25)% and (8.8 +- 1.3)%.

Název v anglickém jazyce

Measurement of top-quark pair production in association with charm quarks in proton-proton collisions at SQUARE ROOT𝑠 = 13 TeV with the ATLAS detector

Popis výsledku anglicky

Inclusive cross-sections for top-quark pair production in association with charm quarks are measured with proton--proton collision data at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 140 fb-1,collected with the ATLAS experiment at the LHC between 2015 and 2018. The measurements are performed byrequiring one or two charged leptons (electrons and muons), two 𝑏-tagged jets, and at least one additional jetin the final state. A custom flavor-tagging algorithm is employed for the simultaneous identficationof 𝑏-jetsand 𝑐-jets. In a fiducial phase space that replicates the acceptance of the ATLAS detector, the cross-sections for𝑡̄𝑡 + &gt;=2𝑐 and 𝑡̄𝑡 + 1𝑐 production are measured to be 1.28+0.27-0.24 pb and 6.4+1.0-0.9 pb, respectively. The measurementsare primarily limited by uncertainties in the modeling of inclusive 𝑡̄𝑡 and 𝑡̄𝑡 + 𝑏̄𝑏production, in the calibrationof the flavor-tagging algorithm, and by data statistics. Cross-section predictions from various 𝑡̄𝑡 simulations arelargely consistent with the measured cross-section values, though all underpredict the observed values by 0.5to 2.0 standard deviations. In a phase-space volume without requirements on the 𝑡̄𝑡 decay products and the jetmultiplicity, the cross-section ratios of 𝑡̄𝑡 + &gt;=2𝑐 and 𝑡̄𝑡 + 1𝑐 to total 𝑡̄𝑡 + jets production are determined to be(1.23 +- 0.25)% and (8.8 +- 1.3)%.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/EH22_008%2F0004632" target="_blank" >EH22_008/0004632: Výzkum základních stavebních kamenů hmoty s využitím špičkových technologií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

860

Číslo periodika v rámci svazku

2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

28

Strana od-do

139177

Kód UT WoS článku

001389545800001

EID výsledku v databázi Scopus

2-s2.0-85211336127