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@PHDTHESIS{Kondrashova:296934,
author = {Kondrashova, Nataliia},
othercontributors = {Glazov, Alexandre and Haller, Johannes},
title = {{M}easurements of {Z} boson plus jet production cross
section using $\sqrt{s}=8$ {T}e{V} data and studies of jet
quark-gluon decomposition},
issn = {1435-8085},
school = {Universität Hamburg},
type = {Dr.},
address = {Hamburg},
publisher = {Verlag Deutsches Elektronen-Synchrotron},
reportid = {PUBDB-2016-01688, DESY-THESIS-2016-009},
series = {DESY-THESIS},
pages = {129},
year = {2016},
note = {Universität Hamburg, Diss., 2016},
abstract = {A measurement of the differential cross-section of $pp
\rightarrow Z/\gamma^{*}(\rightarrow e^{+}e^{-})$~+~jet
production and a study of the jet quark-gluon decomposition
are presented. The data of 21.3 $\mathrm{fb^{-1}}$ collected
with the ATLAS detector at the Large Hadron Collider in 2012
at the centre-of-mass energy $\sqrt{s} = 8$~TeV are used.The
double-differential $pp \rightarrow Z/\gamma^{*}(\rightarrow
e^{+}e^{-})$~+~jet cross-section is measured as a function
of the absolute rapidity and the transverse momentum of
jets. The jet quark-gluon decomposition study is performed
in bins of the transverse momentum and the absolute rapidity
of the highest-$p_{T}$ jet. The possibility to distinguish
between quark-initiated and gluon-initiated jets is
especially important for beyond Standard Mode searches,
where a lot of signal processes have quarks in the final
states, while background processes in Quantum Chromodynamic
have mostly gluons. The performance of the discrimination
between these two types of jets using different jet
properties is studied using data-driven techniques with
purified quark-like and gluon-like jet samples. The $pp
\rightarrow Z/\gamma^{*}(\rightarrow e^{+}e^{-})$~+~jet
production provides an important test of perturbative
Quantum Chromodynamics and is an important background for
many Standard Model processes and beyond Standard Model
searches. In addition, the measurement of the $pp
\rightarrow Z/\gamma^{*}(\rightarrow e^{+}e^{-})$~+~jet
cross section as a function of the absolute rapidity and the
transverse momentum of inclusive jets provides constraints
on the uncertainties on the parton distribution functions.
The rapidity of jets provides the information on the
fraction of the initial proton’s momentum carried by the
interacting partons, which provides the sensitivity to the
parton distribution functions, while the transverse momentum
of jets allows to probe different transfer momentum
scales.The measured cross-section is compared to the
predictions from Monte Carlo generators based on leading
order matrix elements and supplemented by parton showers,
where the predictions are normalised to the inclusive $pp
\rightarrow Z/\gamma^{*}\rightarrow e^{+}e^{-}$
cross-section calculated at the next-to-next-to-leading
order. The predictions are in a good agreement with the
measured cross-section within the uncertainty on the
measurement, except particular absolute rapidity and
transverse momentum regions.},
cin = {ATLAS},
cid = {I:(DE-H253)ATLAS-20120731},
pnm = {611 - Fundamental Particles and Forces (POF3-611)},
pid = {G:(DE-HGF)POF3-611},
experiment = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
typ = {PUB:(DE-HGF)29 / PUB:(DE-HGF)11},
doi = {10.3204/DESY-THESIS-2016-009},
url = {https://bib-pubdb1.desy.de/record/296934},
}