Measurements of fiducial cross-sections for tt production with one or two additional b-jets in pp collisions at s =8 TeV using the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00470645" target="_blank" >RIV/68378271:_____/16:00470645 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1140/epjc/s10052-015-3852-4" target="_blank" >http://dx.doi.org/10.1140/epjc/s10052-015-3852-4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-015-3852-4" target="_blank" >10.1140/epjc/s10052-015-3852-4</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurements of fiducial cross-sections for tt production with one or two additional b-jets in pp collisions at s =8 TeV using the ATLAS detector

Popis výsledku v původním jazyce

Fiducial cross-sections for tt production with one or two additional b-jets are reported, using an integrated luminosity of 20.3 fb1 of proton–proton collisions at a centre-of-mass energy of 8 TeV at the Large Hadron Collider, collected with the ATLAS detector. The cross-section times branching ratio for tt events with at least one additional b-jet is measured to be 950 70 (stat.)+240190 (syst.) fb in the lepton-plus-jets channel and 50 10 (stat.)+1510 (syst.) fb in the eμ channel. The cross-section times branching ratio for events with at least two additional b-jets is measured to be 19.3 3.5 (stat.) 5.7 (syst.) fb in the dilepton channel ( eμ , μμ , and ee) using a method based on tight selection criteria, and 13.5 3.3 (stat.) 3.6 (syst.) fb using a looser selection that allows the background normalisation to be extracted from data. The latter method also measures a value of 1.30 0.33 (stat.) 0.28 (syst.)% for the ratio of tt production with two additional b-jets to tt production with any two additional jets. All measurements are in good agreement with recent theory predictions.n

Název v anglickém jazyce

Measurements of fiducial cross-sections for tt production with one or two additional b-jets in pp collisions at s =8 TeV using the ATLAS detector

Popis výsledku anglicky

Fiducial cross-sections for tt production with one or two additional b-jets are reported, using an integrated luminosity of 20.3 fb1 of proton–proton collisions at a centre-of-mass energy of 8 TeV at the Large Hadron Collider, collected with the ATLAS detector. The cross-section times branching ratio for tt events with at least one additional b-jet is measured to be 950 70 (stat.)+240190 (syst.) fb in the lepton-plus-jets channel and 50 10 (stat.)+1510 (syst.) fb in the eμ channel. The cross-section times branching ratio for events with at least two additional b-jets is measured to be 19.3 3.5 (stat.) 5.7 (syst.) fb in the dilepton channel ( eμ , μμ , and ee) using a method based on tight selection criteria, and 13.5 3.3 (stat.) 3.6 (syst.) fb using a looser selection that allows the background normalisation to be extracted from data. The latter method also measures a value of 1.30 0.33 (stat.) 0.28 (syst.)% for the ratio of tt production with two additional b-jets to tt production with any two additional jets. All measurements are in good agreement with recent theory predictions.n

Druh

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

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

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

—

Svazek periodika

76

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

38

Strana od-do

—

Kód UT WoS článku

000370645300001

EID výsledku v databázi Scopus

2-s2.0-84953854901