INVESTIGADORES
MONTICELLI Fernando Gabriel
artículos
Título:
Measurement of ZZ production in pp collisions at √s = 7 TeV and limits on anomalous ZZZ and ZZgamma couplings with the ATLAS detector
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
JOURNAL OF HIGH ENERGY PHYSICS
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2013 vol. 2013 p. 1 - 43
ISSN:
1126-6708
Resumen:
A
measurement of the ZZ production cross section in proton-proton
collisions at sqrt(s) = 7 TeV using data recorded by the ATLAS
experiment at the Large Hadron Collider is presented. In a data sample
corresponding to an integrated luminosity of 4.6 fb-1 collected in 2011,
events are selected that are consistent either with two Z bosons
decaying to electrons or muons or with one Z boson decaying to electrons
or muons and a second Z boson decaying to neutrinos. The ZZ*->llll
and ZZ->llnunu cross sections are measured in restricted phase-space
regions. These results are then used to derive the total cross section
for ZZ events produced with both Z bosons in the mass range 66 to 116
GeV, sigmaZZtot = 6.7 +-0.7 +0.4-0.3 +-0.3 pb, which is consistent with
the Standard Model prediction of 5.89+0.22-0.18 pb calculated at
next-to-leading order in QCD. The normalized differential cross sections
in bins of various kinematic variables are presented. Finally, the
differential event yield as a function of the transverse momentum of the
leading Z boson is used to set limits on anomalous neutral triple gauge
boson couplings in ZZ production.A measurement of the ZZ production
cross section in proton-proton collisions at TeV using data recorded by
the ATLAS experiment at the Large Hadron Collider is presented. In a
data sample corresponding to an integrated luminosity of 4.6 fb(−1)
collected in 2011, events are selected that are consistent either with
two Z bosons decaying to electrons or muons or with one Z boson decaying
to electrons or muons and a second Z boson decaying to neutrinos. The
ZZ ((*)) → ℓ (+) ℓ (−) ℓ (′+) ℓ (′−) and cross sections are measured in
restricted phase-space regions. These results are then used to derive
the total cross section for ZZ events produced with both Z bosons in the
mass range 66 to 116 GeV, pb, which is consistent with the Standard
Model prediction of pb calculated at next-to-leading order in QCD. The
normalized differential cross sections in bins of various kinematic
variables are presented. Finally, the differential event yield as a
function of the transverse momentum of the leading Z boson is used to
set limits on anomalous neutral triple gauge boson couplings in ZZ
production.