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

UNSPECIFIED (2014) Measurements of four-lepton production at the Z resonance in pp collisions at s√=7 and 8 TeV with ATLAS. Physical review letters, 112 (23): 231806. ISSN 1079-7114

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Abstract

Measurements of four-lepton (4ℓ, ℓ=e,μ) 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 regions mℓ+ℓ−>5 GeV and 80<m4ℓ<100 GeV, the measured cross sections are 76±18(stat)±4(syst)±1.4(lumi) fb and 107±9(stat)±4(syst)±3.0(lumi) fb at s√=7 and 8 TeV, respectively. By subtracting the nonresonant 4ℓ production contributions and normalizing with Z→μ+μ− events, the branching fraction for the Z boson decay to 4ℓ is determined to be (3.20±0.25(stat)±0.13(syst))×10−6, consistent with the standard model prediction.

Item Type:

Journal Article

Journal or Publication Title:

Physical review letters

Additional Information:

Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2014 CERN, for the ATLAS Collaboration

Uncontrolled Keywords:

/dk/atira/pure/subjectarea/asjc/3100/3100

Subjects:

?? general physics and astronomyphysics and astronomy(all) ??

Departments:

Faculty of Science and Technology > Physics

ID Code:

69981

Deposited By:

ep_importer_pure

Deposited On:

11 Jul 2014 10:00

Refereed?:

Yes

Published?:

Published

Last Modified:

16 Oct 2024 23:41

URI:

https://eprints.lancs.ac.uk/id/eprint/69981