Search for leptonic charge asymmetry in tt(bar)W production in final states with three leptons at CMS = 13 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476249" target="_blank" >RIV/00216208:11320/23:10476249 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=X022TubSb-" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=X022TubSb-</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP07(2023)033" target="_blank" >10.1007/JHEP07(2023)033</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for leptonic charge asymmetry in tt(bar)W production in final states with three leptons at CMS = 13 TeV

Popis výsledku v původním jazyce

A search for the leptonic charge asymmetry (A&apos;c) of top-quark-antiquark pairproduction in association with a W boson (t-tW) is presented. The search is performed usingfinal states with exactly three charged light leptons (electrons or muons) and is based on ps =13TeV proton-proton collision data collected with the ATLAS detector at the Large HadronCollider at CERN during the years 2015-2018, corresponding to an integrated luminosityof 139 fb-1. A profile-likelihood fit to the event yields in multiple regions correspondingto positive and negative differences between the pseudorapidities of the charged leptonsfrom top-quark and top-antiquark decays is used to extract the charge asymmetry. Atreconstruction level, the asymmetry is found to be -0.12 +- 0.14 (stat.) +-0.05 (syst.).An unfolding procedure is applied to convert the result at reconstruction level into acharge-asymmetry value in a fiducial volume at particle level with the result of -0.11 +-0.17 (stat.) +-0.05 (syst.). The Standard Model expectations for these two observables arecalculated using Monte Carlo simulations with next-to-leading-order plus parton showerprecision in quantum chromodynamics and including next-to-leading-order electroweakcorrections. They are -0.084 +0.005-0.003 (scale) +-0.006 (MC stat.) and -0.063 +0.007-0.004 (scale)+-0.004 (MC stat.) respectively, and in agreement with the measurements.

Název v anglickém jazyce

Search for leptonic charge asymmetry in tt(bar)W production in final states with three leptons at CMS = 13 TeV

Popis výsledku anglicky

A search for the leptonic charge asymmetry (A&apos;c) of top-quark-antiquark pairproduction in association with a W boson (t-tW) is presented. The search is performed usingfinal states with exactly three charged light leptons (electrons or muons) and is based on ps =13TeV proton-proton collision data collected with the ATLAS detector at the Large HadronCollider at CERN during the years 2015-2018, corresponding to an integrated luminosityof 139 fb-1. A profile-likelihood fit to the event yields in multiple regions correspondingto positive and negative differences between the pseudorapidities of the charged leptonsfrom top-quark and top-antiquark decays is used to extract the charge asymmetry. Atreconstruction level, the asymmetry is found to be -0.12 +- 0.14 (stat.) +-0.05 (syst.).An unfolding procedure is applied to convert the result at reconstruction level into acharge-asymmetry value in a fiducial volume at particle level with the result of -0.11 +-0.17 (stat.) +-0.05 (syst.). The Standard Model expectations for these two observables arecalculated using Monte Carlo simulations with next-to-leading-order plus parton showerprecision in quantum chromodynamics and including next-to-leading-order electroweakcorrections. They are -0.084 +0.005-0.003 (scale) +-0.006 (MC stat.) and -0.063 +0.007-0.004 (scale)+-0.004 (MC stat.) respectively, and in agreement with the measurements.

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

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Svazek periodika

2023

Číslo periodika v rámci svazku

07

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

54

Strana od-do

033

Kód UT WoS článku

001062554100001

EID výsledku v databázi Scopus

2-s2.0-85164102382