Axel König
A5101500001- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- CCD and CMOS Imaging Sensors
- Thin-Film Transistor Technologies
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Semiconductor Detectors and Materials
- Particle Accelerators and Free-Electron Lasers
- Electron and X-Ray Spectroscopy Techniques
- Semiconductor materials and devices
- Silicon and Solar Cell Technologies
- Gas Dynamics and Kinetic Theory
- Gamma-ray bursts and supernovae
- Herpesvirus Infections and Treatments
- Magnetic properties of thin films
- Environmental Monitoring and Data Management
- Geophysics and Sensor Technology
- Radiation Therapy and Dosimetry
- Geophysical and Geoelectrical Methods
Institute of High Energy Physics
2014-2022
Austrian Academy of Sciences
2014-2019
Infineon Technologies (Austria)
2014
A bstract statistical combination of several searches for the electroweak production charginos and neutralinos is presented. All use proton-proton collision data at $$ \sqrt{s}=13 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>13</mml:mn> </mml:math> TeV, recorded with CMS detector LHC in 2016 corresponding to an integrated luminosity 35.9 fb −1 . In addition previous searches, a targeted analysis requiring...
Searches for resonant and nonresonant pair-produced Higgs bosons (HH) decaying respectively into ll nu nu, through either W or Z bosons, bbbar are presented. The analyses based on a sample of proton-proton collisions at sqrt(s) = 13 TeV, collected by the CMS experiment LHC, corresponding to an integrated luminosity 35.9 inverse femtobarns. Data predictions from standard model in agreement within uncertainties. For HH hypothesis, data exclude 95% confidence level product production cross...
A search is presented for single production of a vector-like quark (T) decaying to Z boson and top quark, with the leptonically hadronically. The uses data collected by CMS experiment in proton-proton collisions at center-of-mass energy 13 TeV 2016, corresponding an integrated luminosity 35.9 fb$^{-1}$. presence forward jets particular characteristic quarks that used analysis. For first time, different T width hypotheses are studied, from negligibly small 30% new particle mass. At 95%...
Differential production cross sections of prompt J/ψ and ψ(2S) charmonium ϒ(nS) (n=1,2,3) bottomonium states are measured in proton–proton collisions at s=13TeV, with data collected by the CMS detector LHC, corresponding to an integrated luminosity 2.3 fb−1 for 2.7 other mesons. The five quarkonium reconstructed dimuon decay channel, rapidity |y|<1.2. double-differential each state as a function y transverse momentum, compared theoretical expectations. In addition, ratios presented J/ψ,...
Transverse momentum spectra of charged pions, kaons, and protons are measured in proton-proton collisions at $\sqrt{s}=13\text{ }\text{ }\mathrm{TeV}$ with the CMS detector LHC. The particles, identified via their energy loss silicon tracker, transverse range ${p}_{\mathrm{T}}\ensuremath{\approx}0.1--1.7\text{ }\mathrm{GeV}/c$ rapidities $|y|<1$. ${p}_{\mathrm{T}}$ integrated yields compared to previous results smaller $\sqrt{s}$ predictions Monte Carlo event generators. average increases...
A search for charged Higgs bosons produced via vector boson fusion and decaying into $W$ $Z$ using proton-proton collisions at $\sqrt{s}=13\text{ }\text{ }\mathrm{TeV}$ is presented. The data sample corresponds to an integrated luminosity of $15.2\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected with the CMS detector in 2015 2016. event selection requires three leptons (electrons or muons), two jets large pseudorapidity separation high dijet mass, missing transverse momentum. observation...
A measurement is presented of the cross section for electroweak production a Z boson and photon in association with two jets proton-proton collisions at sqrt(s)= 8 TeV. The bosons are identified through their decays to electron or muon pairs. based on data collected CMS detector corresponding an integrated luminosity 19.7 inverse femtobarns. contribution has significance 3.0 standard deviations, measured fiducial 1.86 +0.90/-0.75 (stat) +0.34/-0.26 (syst) +/- 0.05 (lumi) fb, while summed...
A search for new high-mass resonances in proton-proton collisions having final states with an electron or muon and missing transverse momentum is presented. The analysis uses collision data collected 2016 the CMS detector at LHC a center-of-mass energy of 13 TeV, corresponding to integrated luminosity 35.9 fb$^{-1}$. mass distribution charged lepton-neutrino system used as discriminating variable. No significant deviation from standard model prediction found. best limit, combination...
Event-by-event fluctuations in the elliptic-flow coefficient $v_2$ are studied PbPb collisions at $\sqrt{s_{_\text{NN}}} =$ 5.02 TeV using CMS detector CERN LHC. Elliptic-flow probability distributions ${p}(v_2)$ for charged particles with transverse momentum 0.3 $< p_\mathrm{T} <$ 3.0 GeV and pseudorapidity $| \eta | 1.0 determined different collision centrality classes. The moments of used to calculate $v_{2}$ coefficients based on cumulant orders 2, 4, 6, 8. A rank ordering higher-order...
A bstract search for pair production of massive vector-like T and B quarks in proton-proton collisions at $$ \sqrt{s}=13 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>13</mml:mn> </mml:math> TeV is presented. The data set was collected 2015 by the CMS experiment LHC corresponds to an integrated luminosity up 2.6 fb −1 . are assumed decay through three possible channels into a heavy boson (either W, Z or Higgs...
A search is presented for single production of heavy vector-like quarks (B) that decay to a Higgs boson and b quark, with the decaying highly boosted $\mathrm{b\overline{b}}$ pair reconstructed as collimated jet. The analysis based on data collected by CMS experiment in proton-proton collisions at $\sqrt{s} =$ 13 TeV, corresponding an integrated luminosity 35.9 fb$^{-1}$. are consistent background expectations, upper limits 95% confidence level product B quark cross section branching...
A search for dark matter is conducted in events with large missing transverse momentum and a hadronically decaying, Lorentz-boosted top quark. This study performed using proton-proton collisions at center-of-mass energy of 13 TeV, data recorded by the CMS detector 2016 LHC, corresponding to an integrated luminosity 36 fb$^{-1}$. New substructure techniques, including novel use correlation functions, are utilized identify decay products With no significant deviations observed from predictions...
A measurement is presented of the triple-differential dijet cross section at a centre-of-mass energy 8 $$\,\text {TeV}$$ using 19.7 {fb}^\text {-1}$$ data collected with CMS detector in proton-proton collisions LHC. The measured as function average transverse momentum, half rapidity separation, and boost two leading jets event. corrected for effects compared to calculations perturbative quantum chromodynamics next-to-leading order accuracy, complemented electroweak nonperturbative...
A search for long-lived particles was performed with data corresponding to an integrated luminosity of 2.6 fb−1 collected at a center-of-mass energy 13 TeV by the CMS experiment in 2015. The analysis exploits two customized topological trigger algorithms, and uses multiplicity displaced jets presence signal decay occurring distances between 1 1000 mm. results can be interpreted variety different models. For pair-produced decaying b quarks leptons equal rates lepton flavors, cross sections...
A bstract search for a new heavy particle decaying to pair of vector bosons (WW or WZ) is presented using data from the CMS detector corresponding an integrated luminosity 35.9 fb −1 collected in proton-proton collisions at centre-of-mass energy 13 TeV 2016. One required be W boson eν μ ν, while other reconstructed as single massive jet with substructure compatible that highly-energetic quark Z decay. The performed resonance mass range between 1.0 and 4.4 TeV. largest deviation...
Results are reported from a search for physics beyond the standard model in proton–proton collisions at center-of-mass energy of s=13TeV. The uses signature single lepton, large jet and bottom quark multiplicities, high sum large-radius masses, without any requirement on missing transverse momentum an event. data sample corresponds to integrated luminosity 35.9 fb−1 recorded by CMS experiment LHC. No significant excess prediction processes is observed. results interpreted terms upper limits...
A search for the production of heavy partners top quark with charge 5/3 (X[5/3]) decaying into a and W boson is performed data sample corresponding to an integrated luminosity 2.3 inverse femtobarns, collected in proton-proton collisions at center-of-mass energy 13 TeV CMS detector CERN LHC. Final states either pair same-sign leptons or single lepton, along jets, are considered. No significant excess observed above expected standard model background contribution X[5/3] right-handed...
The strip isolation of AC-coupled n-on-p silicon sensors is compromised by positive charges located in the oxide above bulk. These form an inversion layer electrically interconnecting n+-implanted strips. To achieve a proper though, p+-implantation, p-stop, usually inserted between properties this implantation like concentration or depth influence final isolation. investigate capability field effect transistor (FET) test structures have been designed, measured and simulated using Synopsys...
Most modern particle physics experiments use silicon based sensors for their tracking systems. These are able to detect particles generated in high energy collisions with spatial resolution and therefore allow the precise reconstruction of tracks. So far only a few vendors were capable producing strip quality needed experiments. Together European-based semiconductor manufacturer Infineon Technologies AG (Infineon) Institute High Energy Physics Austrian Academy Sciences (HEPHY) developed...
Front-side biasing is an alternative method to bias a silicon sensor. Instead of directly applying high voltage the backside, one can exploit conductive properties edge region detector exclusively via front-side connections. This option be beneficial for design and might help facilitate assembly process modules. The effective affected by resistance sensor current. measurements n-in-p sensors performed qualify this concept have shown that drop emerging from negligible before irradiation....