@misc{10481/70089,
year = {2021},
month = {7},
url = {http://hdl.handle.net/10481/70089},
abstract = {Measurements of four-lepton differential and integrated fiducial cross-sections in events with two same-flavour, opposite-charge electron or muon pairs are presented. The data correspond to 139 fb(-1) of root s = 13 TeV proton-proton collisions, collected by the ATLAS detector during Run 2 of the Large Hadron Collider (2015-2018). The final state has contributions from a number of interesting Standard Model processes that dominate in different four-lepton invariant mass regions, including single Z boson production, Higgs boson production and on-shell ZZ production, with a complex mix of interference terms, and possible contributions from physics beyond the Standard Model. The differential cross-sections include the four-lepton invariant mass inclusively, in slices of other kinematic variables, and in different lepton flavour categories. Also measured are dilepton invariant masses, transverse momenta, and angular correlation variables, in four regions of four-lepton invariant mass, each dominated by different processes. The measurements are corrected for detector effects and are compared with state-of-the-art Standard Model calculations, which are found to be consistent with the data. The Z -> 4l branching fraction is extracted, giving a value of (4.41 +/- 0.30) x 10(-6). Constraints on effective field theory parameters and a model based on a spontaneously broken B - L gauge symmetry are also evaluated. Further reinterpretations can be performed with the provided information.},
organization = {ANPCyT, Argentina},
organization = {YerPhI, Armenia},
organization = {ARC, Australia},
organization = {BMWFW and FWF, Austria},
organization = {ANAS, Azerbaijan},
organization = {SSTC, Belarus},
organization = {CNPq and
FAPESP, Brazil},
organization = {NSERC, NRC and CFI, Canada},
organization = {CERN},
organization = {ANID, Chile},
organization = {CAS, MOST
and NSFC, China},
organization = {COLCIENCIAS, Colombia},
organization = {MSMT CR, MPO CR and VSC CR, Czech
Republic},
organization = {DNRF and DNSRC, Denmark},
organization = {IN2P3-CNRS and CEA-DRF/IRFU, France;},
organization = {SRNSFG, Georgia},
organization = {BMBF, HGF and MPG, Germany},
organization = {GSRT, Greece},
organization = {RGC and Hong
Kong SAR, China},
organization = {ISF and Benoziyo Center, Israel},
organization = {INFN, Italy},
organization = {MEXT and JSPS, Japan},
organization = {CNRST, Morocco},
organization = {NWO, Netherlands},
organization = {RCN, Norway},
organization = {MNiSW and NCN, Poland},
organization = {FCT,
Portugal},
organization = {MNE/IFA, Romania},
organization = {JINR},
organization = {MES of Russia and NRC KI, Russian Federation},
organization = {MESTD, Serbia},
organization = {MSSR, Slovakia},
organization = {ARRS and MIZŠ, Slovenia},
organization = {DST/NRF, South Africa},
organization = {MICINN, Spain},
organization = {SRC and Wallenberg Foundation, Sweden},
organization = {SERI, SNSF and Cantons of
Bern and Geneva, Switzerland},
organization = {MOST, Taiwan},
organization = {TAEK, Turkey},
organization = {STFC, United Kingdom},
organization = {DOE and NSF, United States of America},
organization = {BCKDF},
organization = {CANARIE, Compute Canada, CRC and IVADO, Canada},
organization = {Beijing Municipal Science & Technology Commission, China},
organization = {COST, ERC, ERDF, Horizon
2020 and Marie Skłodowska-Curie Actions, European Union},
organization = {Investissements d’Avenir
Labex, Investissements d’Avenir Idex and ANR, France},
organization = {DFG and AvH Foundation, Germany},
organization = {Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek
NSRF, Greece},
organization = {BSF-NSF and GIF, Israel},
organization = {La Caixa Banking Foundation, CERCA Programme
Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat
Valenciana, Spain},
organization = {Göran Gustafssons Stiftelse, Sweden},
organization = {The Royal Society and Leverhulme
Trust, United Kingdom.},
publisher = {Springer},
keywords = {Hadron-Hadron scattering (experiments)},
keywords = {Lepton production},
keywords = {Proton-proton scattering},
keywords = {Beyond Standard Model},
keywords = {Branching fraction},
title = {Measurements of differential cross-sections in four-lepton events in 13 TeV proton-proton collisions with the ATLAS detector},
doi = {10.1007/JHEP07(2021)005},
author = {Aad, G. and Aguilar Saavedra, Juan Antonio and Atlas Collaboration},
}