Measurements of four-lepton production at the Z resonance in pp collisions at s = 7 and 8 TeV with ATLAS

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F14%3A00434598" target="_blank" >RIV/68378271:_____/14:00434598 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevLett.112.231806" target="_blank" >http://dx.doi.org/10.1103/PhysRevLett.112.231806</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.112.231806" target="_blank" >10.1103/PhysRevLett.112.231806</a>

Result language
angličtina
Original language name
Measurements of four-lepton production at the Z resonance in pp collisions at s = 7 and 8 TeV with ATLAS
Original language description
Measurements of four-lepton (4?, ?=e,?) production cross sections at the Z resonance in pp collisions at the LHC with the ATLAS detector are presented. For dilepton and four-lepton invariant mass region m?+?>5 GeV and 80<m4?<100 GeV, the measured cross sections are 7618 (stat) 4 (syst) 1.4 (lumi) fb and 1079 (stat) 4 (syst) 3.0 (lumi) fb at s = 7 and 8 TeV, respectively. By subtracting the non-resonant 4? production contributions and normalizing with Z?+? events, the branching fraction for the Z boson decay to 4? is determined to be (3.200.25 (stat)0.13 (syst))106, consistent with the Standard Model prediction.
Czech name
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Czech description
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Type
J<sub>x</sub> - 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
<a href="/en/project/LG13009" target="_blank" >LG13009: International experiment ATLAS-CERN</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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