Reconstruction and identification of pairs of collimated τ-leptons decaying hadronically using √s=13 TeV pp collision data with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00644822" target="_blank" >RIV/68378271:_____/25:00644822 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/25:10511445 RIV/61989592:15310/25:73633868

Výsledek na webu

<a href="https://hdl.handle.net/11104/0374690" target="_blank" >https://hdl.handle.net/11104/0374690</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-025-14075-3" target="_blank" >10.1140/epjc/s10052-025-14075-3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Reconstruction and identification of pairs of collimated τ-leptons decaying hadronically using √s=13 TeV pp collision data with the ATLAS detector

Popis výsledku v původním jazyce

This paper describes an algorithm for reconstructing and identifying a highly collimated hadronically decaying ττ-lepton pair with low transverse momentum. When two τ-leptons are highly collimated, their visible decay products might overlap, degrading the reconstruction performance for each of the τ-leptons. A dedicated treatment attempting to tag the τ-lepton pair as a single object is required. The reconstruction algorithm is based on a large radius jet and its associated two leading subjets, and the identification uses a boosted decision tree to discriminate between signatures from τ+τ− systems and those arising from QCD jets. The efficiency of the identification algorithm is measured in Zγ events using proton–proton collision data at √s=13 TeV collected by the ATLAS experiment at the Large Hadron Collider between 2015 and 2018, corresponding to an integrated luminosity of 139 fb−1. The resulting data-to-simulation scale factors are close to unity with uncertainties ranging from 26 to 37%.

Název v anglickém jazyce

Reconstruction and identification of pairs of collimated τ-leptons decaying hadronically using √s=13 TeV pp collision data with the ATLAS detector

Popis výsledku anglicky

This paper describes an algorithm for reconstructing and identifying a highly collimated hadronically decaying ττ-lepton pair with low transverse momentum. When two τ-leptons are highly collimated, their visible decay products might overlap, degrading the reconstruction performance for each of the τ-leptons. A dedicated treatment attempting to tag the τ-lepton pair as a single object is required. The reconstruction algorithm is based on a large radius jet and its associated two leading subjets, and the identification uses a boosted decision tree to discriminate between signatures from τ+τ− systems and those arising from QCD jets. The efficiency of the identification algorithm is measured in Zγ events using proton–proton collision data at √s=13 TeV collected by the ATLAS experiment at the Large Hadron Collider between 2015 and 2018, corresponding to an integrated luminosity of 139 fb−1. The resulting data-to-simulation scale factors are close to unity with uncertainties ranging from 26 to 37%.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

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

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

European Physical Journal C

ISSN

1434-6044

e-ISSN

1434-6052

Svazek periodika

85

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

35

Strana od-do

561

Kód UT WoS článku

001498813600001

EID výsledku v databázi Scopus

2-s2.0-105006642367