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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BF - Elementary particle theory and high energy physics

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Name of the periodical

European Physical Journal C

ISSN

1434-6044

e-ISSN

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Volume of the periodical

76

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

38

Pages from-to

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UT code for WoS article

000370645300001

EID of the result in the Scopus database

2-s2.0-84953854901