Measurement of the top-quark pole mass in dileptonic (t)over-bar+1-jet events at √s=13 TeV with the ATLAS experiment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10512390" target="_blank" >RIV/00216208:11320/25:10512390 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=ZsBwwcfUG4" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=ZsBwwcfUG4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP12(2025)023" target="_blank" >10.1007/JHEP12(2025)023</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of the top-quark pole mass in dileptonic (t)over-bar+1-jet events at √s=13 TeV with the ATLAS experiment

Popis výsledku v původním jazyce

A measurement of the top-quark pole mass m(t)(pole) t is presented in t (t) over bar events with an additional jet, t (t) over bar+ 1-jet, produced in pp collisions at root s = 13TeV. The data sample, recorded with the ATLAS experiment during Run 2 of the LHC, corresponds to an integrated luminosity of 140 fb(-1). Events with one electron and one muon of opposite electric charge in the final state are selected to measure the t (t) over bar+ 1-jet differential cross-section as a function of the inverse of the invariant mass of the t (t) over bar + 1-jet system. Iterative Bayesian Unfolding is used to correct the data to enable comparison with fixed-order calculations at next-to-leading-order accuracy in the strong coupling. The process pp. t (t) over barj (2. 3), where top quarks are taken as stable particles, and the process pp. b (b) over barl+nu l- (nu) over barj (2. 7), which includes top-quark decays to the dilepton final state and off-shell effects, are considered. The top-quark mass is extracted using chi(2) fit of the unfolded normalized differential cross-section distribution. The results obtained with the 2. 3 and 2. 7 calculations are compatible within theoretical uncertainties, providing an important consistency check. The more precise determination is obtained for the 2. 3 measurement: m(t)(pole) = 170.7 +/- 0.3 (stat.)+/- 1.4 (syst.)+/- 0.3 (scale)+/- 0.2 (PDF circle plus alpha(S)) GeV, which is in good agreement with other top-quark mass results.

Název v anglickém jazyce

Measurement of the top-quark pole mass in dileptonic (t)over-bar+1-jet events at √s=13 TeV with the ATLAS experiment

Popis výsledku anglicky

A measurement of the top-quark pole mass m(t)(pole) t is presented in t (t) over bar events with an additional jet, t (t) over bar+ 1-jet, produced in pp collisions at root s = 13TeV. The data sample, recorded with the ATLAS experiment during Run 2 of the LHC, corresponds to an integrated luminosity of 140 fb(-1). Events with one electron and one muon of opposite electric charge in the final state are selected to measure the t (t) over bar+ 1-jet differential cross-section as a function of the inverse of the invariant mass of the t (t) over bar + 1-jet system. Iterative Bayesian Unfolding is used to correct the data to enable comparison with fixed-order calculations at next-to-leading-order accuracy in the strong coupling. The process pp. t (t) over barj (2. 3), where top quarks are taken as stable particles, and the process pp. b (b) over barl+nu l- (nu) over barj (2. 7), which includes top-quark decays to the dilepton final state and off-shell effects, are considered. The top-quark mass is extracted using chi(2) fit of the unfolded normalized differential cross-section distribution. The results obtained with the 2. 3 and 2. 7 calculations are compatible within theoretical uncertainties, providing an important consistency check. The more precise determination is obtained for the 2. 3 measurement: m(t)(pole) = 170.7 +/- 0.3 (stat.)+/- 1.4 (syst.)+/- 0.3 (scale)+/- 0.2 (PDF circle plus alpha(S)) GeV, which is in good agreement with other top-quark mass results.

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

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Svazek periodika

2025

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

51

Strana od-do

023

Kód UT WoS článku

001641314200001

EID výsledku v databázi Scopus

2-s2.0-105028127250