Search for single production of vector-like quarks decaying into Wb in pp collisions at SQUARE ROOTs = 8 TeV with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F16%3A33162083" target="_blank" >RIV/61989592:15310/16:33162083 - isvavai.cz</a>

Výsledek na webu

<a href="http://link.springer.com/article/10.1140%2Fepjc%2Fs10052-016-4281-8" target="_blank" >http://link.springer.com/article/10.1140%2Fepjc%2Fs10052-016-4281-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-016-4281-8" target="_blank" >10.1140/epjc/s10052-016-4281-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for single production of vector-like quarks decaying into Wb in pp collisions at SQUARE ROOTs = 8 TeV with the ATLAS detector

Popis výsledku v původním jazyce

A search for singly produced vector-like Q quarks& where Q can be either a T quark with charge + 2 / 3 or a Y quark with charge - 4 / 3 & is performed in proton-proton collisions recorded with the ATLAS detector at the LHC. The dataset corresponds to an integrated luminosity of 20.3 fb- 1 and was produced with a centre-of-mass energy of s=8 TeV. This analysis targets QRIGHTWARDS ARROW Wb decays where the W boson decays leptonically. A veto on massive large-radius jets is used to reject the dominant tt- background. The reconstructed Q-candidate mass& ranging from 0.4 to 1.2 TeV& is used in the search to discriminate signal from background processes. No significant deviation from the Standard Model expectation is observed& and limits are set on the QRIGHTWARDS ARROW Wb cross-section times branching ratio. The results are also interpreted as limits on the QWb coupling and the mixing with the Standard Model sector for a singlet T quark or a Y quark from a doublet. T quarks with masses below 0.95 TeV are excluded at 95 % confidence level& assuming a unit coupling and a BR(TRIGHTWARDS ARROW Wb) = 0.5 & whereas the expected limit is 1.10 TeV.

Název v anglickém jazyce

Search for single production of vector-like quarks decaying into Wb in pp collisions at SQUARE ROOTs = 8 TeV with the ATLAS detector

Popis výsledku anglicky

A search for singly produced vector-like Q quarks& where Q can be either a T quark with charge + 2 / 3 or a Y quark with charge - 4 / 3 & is performed in proton-proton collisions recorded with the ATLAS detector at the LHC. The dataset corresponds to an integrated luminosity of 20.3 fb- 1 and was produced with a centre-of-mass energy of s=8 TeV. This analysis targets QRIGHTWARDS ARROW Wb decays where the W boson decays leptonically. A veto on massive large-radius jets is used to reject the dominant tt- background. The reconstructed Q-candidate mass& ranging from 0.4 to 1.2 TeV& is used in the search to discriminate signal from background processes. No significant deviation from the Standard Model expectation is observed& and limits are set on the QRIGHTWARDS ARROW Wb cross-section times branching ratio. The results are also interpreted as limits on the QWb coupling and the mixing with the Standard Model sector for a singlet T quark or a Y quark from a doublet. T quarks with masses below 0.95 TeV are excluded at 95 % confidence level& assuming a unit coupling and a BR(TRIGHTWARDS ARROW Wb) = 0.5 & whereas the expected limit is 1.10 TeV.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

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

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Svazek periodika

76

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

26

Strana od-do

"442-1"-"442-26"

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-84981537786