@article{OPUS4-15022,
  title     = {Two-particle Bose-Einstein correlations in pp collisions at \(\sqrt {s}\) = 0.9 and 7 TeV measured with the ATLAS detector},
  series = {European Physical Journal C: Particles and Fields},
  volume    = {75},
  journal   = {European Physical Journal C: Particles and Fields},
  number    = {10},
  organization    = {ATLAS Collaboration},
  doi       = {10.1140/epjc/s10052-015-3644-x},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-150222},
  pages     = {466},
  year      = {2015},
  abstract  = {The paper presents studies of Bose-Einstein Correlations (BEC) for pairs of like-sign charged particles measured in the kinematic range p\(_{T}\) > 100 MeV and |η| <  2.5 in proton collisions at centre-of-mass energies of 0.9 and 7 TeV with the ATLAS detector at the CERN Large Hadron Collider. The integrated luminosities are approximately 7 μb\(^{-1}\), 190 μb\(^{-1}\) and 12.4 nb\(^{-1}\) for 0.9 TeV, 7 TeV minimum-bias and 7 TeV high-multiplicity data samples, respectively. The multiplicity dependence of the BEC parameters characterizing the correlation strength and the correlation source size are investigated for charged-particle multiplicities of up to 240. A saturation effect in the multiplicity dependence of the correlation source size parameter is observed using the high-multiplicity 7 TeV data sample. The dependence of the BEC parameters on the average transverse momentum of the particle pair is also investigated.},
  language  = {en}
}
@article{OPUS4-15007,
  title     = {Search for a new resonance decaying to a W or Z boson and a Higgs boson in the ℓℓ/ℓν/νν+b\(\overline{b}\) final states with the ATLAS detector},
  series = {European Physical Journal C: Particles and Fields},
  volume    = {75},
  journal   = {European Physical Journal C: Particles and Fields},
  number    = {6},
  organization    = {ATLAS Collaboration},
  doi       = {10.1140/epjc/s10052-015-3474-x},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-150075},
  pages     = {263},
  year      = {2015},
  abstract  = {A search for a new resonance decaying to a W or Z boson and a Higgs boson in the ℓℓ/ℓν/νν+b\(\overline{b}\) final states is performed using 20.3 fb\(^{-1}\) of pp collision data recorded at \(\sqrt {s}\) = 8 TeV with the ATLAS detector at the Large Hadron Collider. The search is conducted by examining the WH / ZH invariant mass distribution for a localized excess. No significant deviation from the Standard Model background prediction is observed. The results are interpreted in terms of constraints on the Minimal Walking Technicolor model and on a simplified approach based on a phenomenological Lagrangian of Heavy Vector Triplets.},
  language  = {en}
}
@article{OPUS4-14337,
  title     = {Measurement of the branching ratio Γ(Λ\(^0_b\)→ψ(2S)Λ\(^0\))/Γ(Λ\(^0_b\)→J/ψΛ\(^0\)) with the ATLAS detector},
  series = {Physics Letters B},
  volume    = {751},
  journal   = {Physics Letters B},
  organization    = {ATLAS Collaboration},
  doi       = {10.1016/j.physletb.2015.10.009},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-143375},
  pages     = {63-80},
  year      = {2015},
  abstract  = {An observation of the View the Λ\(^0_b\)→ψ(2S)Λ\(^0\) decay and a comparison of its branching fraction with that of the Λ\(^0_b\)→J/ψΛ\(^0\) decay has been made with the ATLAS detector in proton-proton collisions at \(\sqrt {s}\)=8 TeV at the LHC using an integrated luminosity of 20.6 fb\(^{-1}\). The J/ψJ/ψ and ψ(2S) mesons are reconstructed in their decays to a muon pair, while the Λ\(^0\)→pπ\(^-\) decay is exploited for the Λ\(^0\) baryon reconstruction. The Λ\(^0_b\) baryons are reconstructed with transverse momentum p\(_T\)>10 GeV pT>10 GeV and pseudorapidity |η|<2.1. The measured branching ratio of the Λ\(^0_b\)→ψ(2S)Λ\(^0\) and Λ\(^0_b\)→J/ψΛ\(^0\) decays is Γ(Λ\(^0_b\)→ψ(2S)Λ\(^0\))/Γ(Λ\(^0_b\)→J/ψΛ\(^0\))=0.501±0.033(stat)±0.019(syst), lower than the expectation from the covariant quark model.},
  language  = {en}
}
@article{RadchukRajivPotokinaetal.2019,
  author    = {Radchuk, Volodymyr and Rajiv, Sharma and Potokina, Elena and Radchuk, Ruslana and Weier, Diana and Munz, Eberhard and Schreiber, Miriam and Mascher, Martin and Stein, Nils and Wicker, Thomas and Kilian, Benjamin and Borisjuk, Ljudmilla},
  title     = {The highly divergent \(Jekyll\) genes, required for sexual reproduction, are lineage specific for the related grass tribes Triticeae and Bromeae},
  series = {Plant Journal},
  volume    = {98},
  journal   = {Plant Journal},
  number    = {6},
  doi       = {10.1111/tpj.14363},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-224769},
  pages     = {961-974},
  year      = {2019},
  abstract  = {Phylogenetically related groups of species contain lineage-specific genes that exhibit no sequence similarity to any genes outside the lineage. We describe here that the Jekyll gene, required for sexual reproduction, exists in two much diverged allelic variants, Jek1 and Jek3. Despite low similarity, the Jek1 and Jek3 proteins share identical signal peptides, conserved cysteine positions and direct repeats. The Jek1/Jek3 sequences are located at the same chromosomal locus and inherited in a monogenic Mendelian fashion. Jek3 has a similar expression as Jek1 and complements the Jek1 function in Jek1-deficient plants. Jek1 and Jek3 allelic variants were almost equally distributed in a collection of 485 wild and domesticated barley accessions. All domesticated barleys harboring the Jek1 allele belong to single haplotype J1-H1 indicating a genetic bottleneck during domestication. Domesticated barleys harboring the Jek3 allele consisted of three haplotypes. Jekyll-like sequences were found only in species of the closely related tribes Bromeae and Triticeae but not in other Poaceae. Non-invasive magnetic resonance imaging revealed intrinsic grain structure in Triticeae and Bromeae, associated with the Jekyll function. The emergence of Jekyll suggests its role in the separation of the Bromeae and Triticeae lineages within the Poaceae and identifies the Jekyll genes as lineage-specific.},
  language  = {en}
}
@article{OPUS4-14423,
  title     = {Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector},
  series = {Physics Letters B},
  volume    = {749},
  journal   = {Physics Letters B},
  organization    = {ATLAS Collaboration},
  doi       = {10.1016/j.physletb.2015.07.079},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-144231},
  pages     = {519-541},
  year      = {2015},
  abstract  = {A search for the associated production of the Higgs boson with a top quark pair is performed in multilepton final states using 20.3 fb\(^{-1}\) of proton-proton collision data recorded by the ATLAS experiment at \(\sqrt {s}\)=8 TeV at the Large Hadron Collider. Five final states, targeting the decays H→WW\(^{*}\), ττ, and ZZ\(^{*}\), are examined for the presence of the Standard Model (SM) Higgs boson: two same-charge light leptons (e or μ) without a hadronically decaying τ lepton; three light leptons; two same-charge light leptons with a hadronically decaying τ lepton; four light leptons; and one light lepton and two hadronically decaying τ leptons. No significant excess of events is observed above the background expectation. The best fit for the t\(\overline{t}\)H production cross section, assuming a Higgs boson mass of 125 GeV, is 2.1\(^{+1.4}_{-1.2}\) times the SM expectation, and the observed (expected) upper limit at the 95\% confidence level is 4.7 (2.4) times the SM rate. The p-value for compatibility with the background-only hypothesis is 1.8σ; the expectation in the presence of a Standard Model signal is 0.9σ.},
  language  = {en}
}
@article{OPUS4-14424,
  title     = {Measurement of exclusive γγ→ℓ\(^{+}\)ℓ\(^{-}\) production in proton-proton collisions at \(\sqrt {s}\)=7 TeV with the ATLAS detector},
  series = {Physics Letters B},
  volume    = {749},
  journal   = {Physics Letters B},
  organization    = {ATLAS Collaboration},
  doi       = {10.1016/j.physletb.2015.07.069},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-144247},
  pages     = {242-261},
  year      = {2015},
  abstract  = {This Letter reports a measurement of the exclusive γγ→ℓ\(^{+}\)ℓ\(^{-}\) (ℓ=e, μℓ=e, μ) cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV by the ATLAS experiment at the LHC, based on an integrated luminosity of 4.6 fb\(^{-1}\). For the electron or muon pairs satisfying exclusive selection criteria, a fit to the dilepton acoplanarity distribution is used to extract the fiducial cross-sections. The cross-section in the electron channel is determined to be \(^{excl.}_{γγ→e^{+}e^{-}}\)=0.428 ± 0.035 (stat.) ± 0.018 (syst.) pb for a phase-space region with invariant mass of the electron pairs greater than 24 GeV, in which both electrons have transverse momentum p\(_{T}\)>12 GeV and pseudorapidity |η|<2.4. For muon pairs with invariant mass greater than 20 GeV, muon transverse momentum p\(_{T}\)>10 GeV and pseudorapidity |η|<2.4, the cross-section is determined to be \(^{excl.}_{γγ→μ^{+}μ^{-}}\) =0.628 ± 0.032 (stat.) ± 0.021 (syst.) pb. When proton absorptive effects due to the finite size of the proton are taken into account in the theory calculation, the measured cross-sections are found to be consistent with the theory prediction.},
  language  = {en}
}
@article{OPUS4-14422,
  title     = {Measurement of colour flow with the jet pull angle in t\(\overline{t}\) events using the ATLAS detector at \(\sqrt {s}\)=8 TeV},
  series = {Physics Letters B},
  volume    = {750},
  journal   = {Physics Letters B},
  organization    = {ATLAS Collaboration},
  doi       = {10.1016/j.physletb.2015.09.051},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-144229},
  pages     = {475-493},
  year      = {2015},
  abstract  = {The distribution and orientation of energy inside jets is predicted to be an experimental handle on colour connections between the hard-scatter quarks and gluons initiating the jets. This Letter presents a measurement of the distribution of one such variable, the jet pull angle. The pull angle is measured for jets produced in t\(\overline{t}\) events with one W boson decaying leptonically and the other decaying to jets using 20.3 fb\(^{-1}\) of data recorded with the ATLAS detector at a centre-of-mass energy of \(\sqrt {s}\)=8 TeV at the LHC. The jet pull angle distribution is corrected for detector resolution and acceptance effects and is compared to various models.},
  language  = {en}
}
@article{OPUS4-22073,
  title     = {Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb\(^{-1}\) of root s=13 TeV \({pp}\) collision data with the ATLAS detector},
  series = {Journal of High Energy Physics},
  volume    = {108},
  journal   = {Journal of High Energy Physics},
  number    = {6},
  organization    = {The ATLAS collaboration},
  doi       = {10.1007/JHEP06(2018)108},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-220733},
  pages     = {1-95},
  year      = {2018},
  abstract  = {The results of a search for the direct pair production of top squarks, the supersymmetric partner of the top quark, in final states with one isolated electron or muon, several energetic jets, and missing transverse momentum are reported. The analysis also targets spin-0 mediator models, where the mediator decays into a pair of dark-matter particles and is produced in association with a pair of top quarks. The search uses data from proton-proton collisions delivered by the Large Hadron Collider in 2015 and 2016 at a centre-of-mass energy of root s = 13TeV and recorded by the ATLAS detector, corresponding to an integrated luminosity of 36 fb(-1). A wide range of signal scenarios with different mass-splittings between the top squark, the lightest neutralino and possible intermediate supersymmetric particles are considered, including cases where the W bosons or the top quarks produced in the decay chain are off-shell. No significant excess over the Standard Model prediction is observed. The null results are used to set exclusion limits at 95\% confidence level in several supersymmetry benchmark models. For pair-produced top-squarks decaying into top quarks, top-squark masses up to 940 GeV are excluded. Stringent exclusion limits are also derived for all other considered top-squark decay scenarios. For the spin-0 mediator models, upper limits are set on the visible cross-section.},
  language  = {en}
}
@phdthesis{Wiest2022,
  author    = {Wiest, Wolfram},
  title     = {Entwicklung einer Apparatur zur In-situ-Erm{\"u}dungspr{\"u}fung von Zahnimplantaten mittels Synchrotron Micro-CT},
  doi       = {10.25972/OPUS-25770},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-257702},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2022},
  abstract  = {Die vorliegende Arbeit besch{\"a}ftigt sich mit der volumenbildgebenden Untersuchung von mechanischen Erm{\"u}dungsprozessen in Titan-Zahnimplantaten. Im Vordergrund steht die Entwicklung einer neuen Messmethode der In-situ-Mikrotomografie am Synchrotron. Zahnimplantate werden beim Gebrauch mechanisch wiederholt belastet (Wechsellast). Nach vielen zyklischen Belastungen k{\"o}nnen aufgrund von mikroplastische Verformungen Erm{\"u}dungssch{\"a}den auftreten. Diese k{\"o}nnen im Extremfall zum Versagen und Verlust eines Implantats f{\"u}hren. Die Computertomographie ist eine sehr geeignete zerst{\"o}rungsfrei Pr{\"u}fmethode, um Zahnimplantate zu untersuchen. Diese Arbeit erweitert die bisherige CT-Methode insofern, dass In-situ-Beobachtungen bei mechanischer Belastung m{\"o}glich sind. Die in dieser Arbeit untersuchten Zahnimplantate weisen an der Implantat-Abutment-Grenzfl{\"a}che bei eintretender Erm{\"u}dung einen Mikrospalt auf. Dieser wird als Indikator f{\"u}r einsetzende Fatigue- Prozesse benutzt. Der in der Synchrotron CT verf{\"u}gbare Inlinephasenkontrast erm{\"o}glicht eine verbesserte Bestimmung der Mikrospaltgr{\"o}ße. Da die schnellen Bewegungen der Erm{\"u}dungspr{\"u}fung mittels Standard-CT-Verfahren schwer zu erfassen sind, war die stroboskopische Aufnahmemethode das zielf{\"u}hrende Messverfahren, um in-situ-Pr{\"u}fung zu erm{\"o}glichen. Die 4 kommerziellen Zahnimplantattypen werden neben der In-situ-Fatigue Pr{\"u}fung auch mittels klassischer Erm{\"u}dungspr{\"u}fung untersucht und mit der Neuen Messmethode verglichen. Die hier entwickelte In-situ-Fatigue-Pr{\"u}fstation kann Proben bis zu 345 N tomographisch untersuchen. Neben den experimentellen Untersuchungen wird eine statische FEM-Betrachtung durchgef{\"u}hrt und mit experimentellen Messdaten verglichen. Zuletzt wird mit der entwickelten Messtation Knochenrisse in der Implantat Umgebung untersucht.},
  subject      = {Mikrocomputertomographie},
  language  = {de}
}
@article{OPUS4-22074,
  title     = {Search for supersymmetry in final states with missing transverse momentum and multiple b-jets in proton-proton collisions at root s=13 TeV with the ATLAS detector},
  series = {Journal of High Energy Physics},
  volume    = {107},
  journal   = {Journal of High Energy Physics},
  number    = {6},
  organization    = {The ATLAS collaboration},
  doi       = {10.1007/JHEP06(2018)107},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-220748},
  pages     = {1-55},
  year      = {2018},
  abstract  = {A search for supersymmetry involving the pair production of gluinos decaying via third-generation squarks into the lightest neutralino ((chi) over tilde (0)(1)) is reported. It uses LHC proton-proton collision data at a centre-of-mass energy root s = 13TeV with an integrated luminosity of 36.1 fb(-1) collected with the ATLAS detector in 2015 and 2016. The search is performed in events containing large missing transverse momentum and several energetic jets, at least three of which must be identified as originating from b-quarks. To increase the sensitivity, the sample is divided into subsamples based on the presence or absence of electrons or muons. No excess is found above the predicted background. For (chi) over tilde (0)(1) masses below approximately 300 GeV, gluino masses of less than 1.97 (1.92) TeV are excluded at 95\% confidence level in simplified models involving the pair production of gluinos that decay via top (bottom) squarks. An interpretation of the limits in terms of the branching ratios of the gluinos into third-generation squarks is also provided. These results improve upon the exclusion limits obtained with the 3.2 fb(-1) of data collected in 2015.},
  language  = {en}
}