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EnglishA measurement of the four-lepton invariant mass spectrum is made with the ATLAS detector, using an integrated luminosity of 36.1 fb−1 of proton-proton collisions at sqrt(s) = 13 TeV delivered by the Large Hadron Collider. The differential cross-section is measured for events containing two same-flavour opposite-sign lepton pairs. It exhibits a rich structure, with different mass regions dominated in the Standard Model by single Z boson production, Higgs boson production, and Z boson pair production, and nonnegligible interference effects at high invariant masses. The measurement is compared with state-of-the-art Standard Model calculations, which are found to be consistent with the data. These calculations are used to interpret the data in terms of gg → ZZ → 4` and Z → 4` subprocesses, and to place constraints on a possible contribution from physics beyond the Standard Model.
| Titolo: | Measurement of the four-lepton invariant mass spectrum in 13 TeV proton-proton collisions with the ATLAS detector |
| Autori: | |
| Data di pubblicazione: | 2019 |
| Rivista: | |
| Abstract: | A measurement of the four-lepton invariant mass spectrum is made with the ATLAS detector, using an integrated luminosity of 36.1 fb−1 of proton-proton collisions at sqrt(s) = 13 TeV delivered by the Large Hadron Collider. The differential cross-section is measured for events containing two same-flavour opposite-sign lepton pairs. It exhibits a rich structure, with different mass regions dominated in the Standard Model by single Z boson production, Higgs boson production, and Z boson pair production, and nonnegligible interference effects at high invariant masses. The measurement is compared with state-of-the-art Standard Model calculations, which are found to be consistent with the data. These calculations are used to interpret the data in terms of gg → ZZ → 4` and Z → 4` subprocesses, and to place constraints on a possible contribution from physics beyond the Standard Model. |
| Handle: | http://hdl.handle.net/11587/429944 |
| Appare nelle tipologie: | Articolo pubblicato su Rivista |
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