Search for s-channel single top-quark production in proton?proton collisions at s = 8 TeV with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F15%3A00450139" target="_blank" >RIV/68378271:_____/15:00450139 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.physletb.2014.11.042" target="_blank" >http://dx.doi.org/10.1016/j.physletb.2014.11.042</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2014.11.042" target="_blank" >10.1016/j.physletb.2014.11.042</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for s-channel single top-quark production in proton?proton collisions at s = 8 TeV with the ATLAS detector

Popis výsledku v původním jazyce

This Letter presents a search at the LHC for s -channel single top-quark production in proton?proton collisions at a centre-of-mass energy of 8 TeV. The analyzed data set was recorded by the ATLAS detector and corresponds to an integrated luminosity of 20.3 fb 1 . Selected events contain one charged lepton, large missing transverse momentum and exactly two b -tagged jets. A multivariate event classifier based on boosted decision trees is developed to discriminate s -channel single top-quark events fromthe main background contributions. The signal extraction is based on a binned maximum-likelihood fit of the output classifier distribution. The analysis leads to an upper limit on the s -channel single top-quark production cross-section of 14.6 pb at the95% confidence level. The fit gives a cross-section of ?s=5.04.3 pb , consistent with the Standard Model expectation.

Název v anglickém jazyce

Search for s-channel single top-quark production in proton?proton collisions at s = 8 TeV with the ATLAS detector

Popis výsledku anglicky

This Letter presents a search at the LHC for s -channel single top-quark production in proton?proton collisions at a centre-of-mass energy of 8 TeV. The analyzed data set was recorded by the ATLAS detector and corresponds to an integrated luminosity of 20.3 fb 1 . Selected events contain one charged lepton, large missing transverse momentum and exactly two b -tagged jets. A multivariate event classifier based on boosted decision trees is developed to discriminate s -channel single top-quark events fromthe main background contributions. The signal extraction is based on a binned maximum-likelihood fit of the output classifier distribution. The analysis leads to an upper limit on the s -channel single top-quark production cross-section of 14.6 pb at the95% confidence level. The fit gives a cross-section of ?s=5.04.3 pb , consistent with the Standard Model expectation.

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

<a href="/cs/project/LG13009" target="_blank" >LG13009: Mezinárodní experiment ATLAS-CERN</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Physics Letters. B

ISSN

0370-2693

e-ISSN

—

Svazek periodika

740

Číslo periodika v rámci svazku

Jan

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

19

Strana od-do

—

Kód UT WoS článku

000347046200017

EID výsledku v databázi Scopus

2-s2.0-84915749676