K.J. Flöthner
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View article: Measurement of the hard exclusive <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"> <mml:msup> <mml:mi>π</mml:mi> <mml:mn>0</mml:mn> </mml:msup> </mml:math> muoproduction cross section at COMPASS
Measurement of the hard exclusive muoproduction cross section at COMPASS Open
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View article: Embedding the Timepix4 in Micro-Pattern Gaseous Detectors
Embedding the Timepix4 in Micro-Pattern Gaseous Detectors Open
The combination of Micro-Pattern Gaseous Detectors (MPGDs) and pixel charge readout enables specific experimental opportunities. Using the Timepix4 for the readout is advantageous because of its size (around 7cm
View article: Drift time calibration of the ultra-low material budget GEM-based TPC for MIXE
Drift time calibration of the ultra-low material budget GEM-based TPC for MIXE Open
Muon-Induced X-ray Emission (MIXE) is a non-destructive analytical technique that leverages negative muons to probe elemental and isotopic compositions by detecting characteristic muonic X-rays emitted during atomic cascades and gamma rays…
View article: Spectroscopy of Strange Mesons and First Observation of a Strange Crypto-Exotic State with $J^P=0^-$
Spectroscopy of Strange Mesons and First Observation of a Strange Crypto-Exotic State with $J^P=0^-$ Open
We measured the strange-meson spectrum in the scattering reaction $K^{-}+p \rightarrow K^{-}π^{-}π^{-}+p$ with the COMPASS spectrometer at CERN. Using the world's largest sample of this reaction, we performed a comprehensive partial-wave a…
View article: Integration of the FastIC front-end electronics into the Picosec MicroMegas detector
Integration of the FastIC front-end electronics into the Picosec MicroMegas detector Open
Thanks to the BE-CEM-EPR electronics services, in particular Pascal Vulliez, for the design and manufacturing of the SLVS-to-CMOS multi-channel readout adapter. Further, the authors would like to acknowledge the support by the RD51 collabo…
View article: The ultra-low material budget GEM-based TPC for tracking with VMM3a readout
The ultra-low material budget GEM-based TPC for tracking with VMM3a readout Open
The Gaseous Electron Multiplier-based Time Projection Chamber (GEM-TPC) in TWIN configuration for particle tracking has been consolidated after extensive investigations in different facilities to study its tracking performance. The most at…
View article: Towards MPGDs with embedded pixel ASICs
Towards MPGDs with embedded pixel ASICs Open
Combining gaseous detectors with a high-granularity pixelated charge readout enables experimental applications which otherwise could not be achieved. This includes high-resolution tracking of low-energetic particles, requiring ultra-low ma…
View article: Measurement of the hard exclusive $π^{0}$ muoproduction cross section at COMPASS
Measurement of the hard exclusive $π^{0}$ muoproduction cross section at COMPASS Open
A new and detailed measurement of the cross section for hard exclusive neutral-pion muoproduction on the proton was performed in a wide kinematic region, with the photon virtuality $Q^2$ ranging from 1 to 8 (GeV/$c$)$^{\rm\, 2}$ and the Bj…
View article: PICOSEC-Micromegas Detector, an innovative solution for Lepton Time Tagging
PICOSEC-Micromegas Detector, an innovative solution for Lepton Time Tagging Open
View article: Multiplicities of positive and negative pions, kaons and unidentified hadrons from deep-inelastic scattering of muons off a liquid hydrogen target
Multiplicities of positive and negative pions, kaons and unidentified hadrons from deep-inelastic scattering of muons off a liquid hydrogen target Open
The multiplicities of positive and negative pions, kaons and unidentified hadrons produced in deep-inelastic scattering are measured in bins of the Bjorken scaling variable $x$, the relative virtual-photon energy $y$ and the fraction of th…
View article: High-Statistics Measurement of Collins and Sivers Asymmetries for Transversely Polarized Deuterons
High-Statistics Measurement of Collins and Sivers Asymmetries for Transversely Polarized Deuterons Open
New results are presented on a high-statistics measurement of Collins and Sivers asymmetries of charged hadrons produced in deep inelastic scattering of muons on a transversely polarized LiD
View article: Final COMPASS Results on the Transverse-Spin-Dependent Azimuthal Asymmetries in the Pion-Induced Drell-Yan Process
Final COMPASS Results on the Transverse-Spin-Dependent Azimuthal Asymmetries in the Pion-Induced Drell-Yan Process Open
The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190 GeV/c π− beam impinging on a transversely polarized ammonia target. Combining the data of both years, we present final results on the a…
View article: Spatial resolution improvements with finer-pitch GEMs
Spatial resolution improvements with finer-pitch GEMs Open
Gas Electron Multipliers (GEMs) are used in many particle physics experiments, employing their `standard' configuration with amplification holes of 140 μ m pitch in a hexagonal pattern. However, the collection of the charge cloud from the …
View article: Characterisation of resistive MPGDs with 2D readout
Characterisation of resistive MPGDs with 2D readout Open
Micro-Pattern Gaseous Detectors (MPGDs) with resistive anode planes provide intrinsic discharge robustness while maintaining good spatial and time resolutions. Typically read out with 1D strips or pad structures, here the characterisation …
View article: High-statistics measurement of Collins and Sivers asymmetries for transversely polarised deuterons
High-statistics measurement of Collins and Sivers asymmetries for transversely polarised deuterons Open
New results are presented on a high-statistics measurement of Collins and Sivers asymmetries of charged hadrons produced in deep inelastic scattering of muons on a transversely polarised $^6$LiD target. The data were taken in 2022 with the…
View article: Final COMPASS results on the transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan process
Final COMPASS results on the transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan process Open
The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190 GeV/c $π^{-}$ beam impinging on a transversely polarised ammonia target. Combining the data of both years, we present final results on t…
View article: Spin density matrix elements in exclusive $$\rho ^0$$ meson muoproduction
Spin density matrix elements in exclusive $$\rho ^0$$ meson muoproduction Open
We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $$\rho ^0$$ meson muoproduction at COMPASS using 160 GeV/ c polarised $$ \mu ^{+}$$ and $$ \mu ^{-}$$ beams impinging on a liquid hydrogen tar…
View article: Transverse-spin-dependent azimuthal asymmetries of pion and kaon pairs produced in muon-proton and muon-deuteron semi-inclusive deep inelastic scattering
Transverse-spin-dependent azimuthal asymmetries of pion and kaon pairs produced in muon-proton and muon-deuteron semi-inclusive deep inelastic scattering Open
A set of measurements of azimuthal asymmetries in the production of pairs of identified hadrons in deep-inelastic scattering of muons on transversely polarised 6LiD (deuteron) and NH3 (proton) targets is presented. All available data colle…
View article: Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of ρ0 mesons
Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of ρ0 mesons Open
View article: Studying signals in particle detectors with resistive elements such as the 2D resistive strip bulk MicroMegas
Studying signals in particle detectors with resistive elements such as the 2D resistive strip bulk MicroMegas Open
As demonstrated by the ATLAS New Small Wheel community with their MicroMegas (MM) design, resistive electrodes are now used in different detector types within the Micro Pattern Gaseous Detector family to improve their robustness or perform…
View article: Double J/ψ production in pion-nucleon scattering at COMPASS
Double J/ψ production in pion-nucleon scattering at COMPASS Open
We present the study of the production of double $J/\\psi$ mesons using COMPASS data collected with a 190 $\\GeV/c$ $\\pi^-$ beam scattering off NH$_{3}$, Al and W targets. Kinematic distributions of the collected double $J/\\psi$ events a…
View article: Probing transversity by measuring Λ polarisation in SIDIS
Probing transversity by measuring Λ polarisation in SIDIS Open