L. Ropelewski
A5023811462- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Atomic and Subatomic Physics Research
- CCD and CMOS Imaging Sensors
- Dark Matter and Cosmic Phenomena
- Nuclear Physics and Applications
- Photocathodes and Microchannel Plates
- Muon and positron interactions and applications
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Plasma Diagnostics and Applications
- Electron and X-Ray Spectroscopy Techniques
- Radiation Effects in Electronics
- Neutrino Physics Research
- Graphene research and applications
- Air Quality Monitoring and Forecasting
- Advanced Data Storage Technologies
- X-ray Spectroscopy and Fluorescence Analysis
- X-ray Diffraction in Crystallography
- Semiconductor materials and devices
- Inorganic Fluorides and Related Compounds
- Diamond and Carbon-based Materials Research
European Organization for Nuclear Research
2015-2024
Friedrich-Alexander-Universität Erlangen-Nürnberg
2024
Université Paris-Saclay
2019-2024
Aarhus University
2024
University of Bonn
2024
Helsinki Institute of Physics
2024
University of Helsinki
2024
Frédéric Joliot Institute for Life Sciences
2023
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2019-2023
Direction de la Recherche Fondamentale
2023
Experimental results obtained at the CERN Super Proton Synchrotron on structure-function ratio F2n/F2p in kinematic range 0.004<x<0.8 and 0.4<Q2<190 GeV2, together with structure function F2d determined from a fit to published data, are used derive difference F2p(x)-F2n(x). The value of Gottfried sum F(F2p-F2n)dx/x=0.240±0.016 is below quark-parton-model expectation 1/3.Received 23 January 1991DOI:https://doi.org/10.1103/PhysRevLett.66.2712©1991 American Physical Society
TOTEM has measured the differential cross-section for elastic proton-proton scattering at LHC energy of {\srud}s = 7TeV analysing data from a short run with dedicated large {\beta} * optics. A single exponential fit slope B (20:1{\pm}0:2stat {\pm}0:3syst)GeV-2 describes range four-momentum transfer squared |t| 0.02 to 0.33 GeV2. After extrapolation 0, total (24:8{\pm}0:2stat {\pm}1:2syst) mb was obtained. Applying optical theorem and using luminosity measurement CMS, (98:3{\pm}0:2stat...
At the LHC energy of , under various beam and background conditions, luminosities, Roman Pot positions, TOTEM has measured differential cross-section for proton-proton elastic scattering as a function four-momentum transfer squared t. The results different analyses are in excellent agreement demonstrating no sizeable dependence on conditions. Due to very close approach detectors center (≈5σbeam) dedicated run with β* = 90 m, |t|-values down 5·10−3 GeV2 were reached. exponential slope this...
The TOTEM collaboration has measured the proton-proton total cross section at √s=8 TeV using a luminosity-independent method. In LHC fills with dedicated beam optics, Roman pots have been inserted very close to allowing detection of ~90% nuclear elastic scattering events. Simultaneously inelastic rate by T1 and T2 telescopes. By applying optical theorem, (101.7±2.9) mb determined, well in agreement extrapolation from lower energies. This method also allows one derive sections:...
The TOTEM experiment at the LHC has performed first luminosity-independent determination of total proton-proton cross-section . This technique is based on optical theorem and requires simultaneous measurements inelastic rate – accomplished with forward charged-particle telescopes T1 T2 in range 3.1 < |η| 6.5 elastic by detecting outcoming protons Roman Pot detectors. data presented here were collected a dedicated run 2011 special beam optics (β* = 90 m) Pots approaching close enough to...
The muon-proton and muon-deuteron inclusive deep inelastic scattering cross sections were measured in the kinematic range 0.002 < × 0.60 0.5 Q2 75 GeV2 at incident muon energies of 90, 120, 200 280 GeV. These results are based on full data set collected by New Muon Collaboration, including taken with a small angle trigger. extracted values structure functions F2p F2d good agreement those from other experiments. cover sufficient y to allow determination ratio longitudinally transversely...
We present a new determination of the nonsinglet structure function Fp2 - Fn2 at Q2=4 GeV2 using recently measured values Fd2 and Fn2/Fp2. A evaluation Gottfried sum is given, which remains below simple quark-parton model value 1/3.Received 1 March 1994DOI:https://doi.org/10.1103/PhysRevD.50.R1©1994 American Physical Society
The TOTEM Experiment will measure the total pp cross-section with luminosity-independent method and study elastic diffractive scattering at LHC. To achieve optimum forward coverage for charged particles emitted by collisions in interaction point IP5, two tracking telescopes, T1 T2, be installed on each side pseudorapidity region 3.1 ⩽ |η| 6.5, Roman Pot stations placed distances of ±147 m ±220 from IP5. Being an independent experiment but technically integrated into CMS, first operate...
The TOTEM experiment has made a precise measurement of the elastic proton-proton differential cross-section at centre-of-mass energy sqrt(s) = 8 TeV based on high-statistics data sample obtained with beta* 90 optics. Both statistical and systematic uncertainties remain below 1%, except for t-independent contribution from overall normalisation. This unprecedented precision allows to exclude purely exponential in range four-momentum transfer squared 0.027 < |t| 0.2 GeV^2 significance greater...
Proton-proton elastic scattering has been measured by the TOTEM experiment at CERN Large Hadron Collider in dedicated runs with Roman Pot detectors placed as close seven times transverse beam size (σbeam) from outgoing beams. After careful study of accelerator optics and detector alignment, |t|, square four-momentum transferred process, determined an uncertainty . In this letter, first results differential cross-section are presented covering a |t|-range 0.36 to 2.5 GeV2. The range < |t|...
We present the Migdal In Galactic Dark mAtter expLoration (MIGDAL) experiment aiming at unambiguous observation and study of so-called effect induced by fast-neutron scattering. It is hoped that this elusive atomic process can be exploited to enhance reach direct dark matter search experiments lower masses, but it still lacking experimental confirmation. Our goal detect predicted electron emission which thought accompany nuclear scattering with low, calculable, probability, deploying an...
Results are presented for F2d/F2p and Rd − Rp from simultaneous measurements of deep inelastic muon scattering on hydrogen deuterium targets, at 90, 120, 200 280 GeV. The difference Rp, determined in the range 0.002 < x 0.4 an average Q2 5 GeV2, is compatible with zero. dependence was measured kinematic 0.001 0.8 0.1 145 GeV2 small statistical systematic errors. For > ratio decreases Q2.
The TOTEM experiment at the LHC has measured inelastic proton-proton cross-section in a β* = 90 m run with low pile-up. measurement was based on events least one charged particle T2 telescope acceptance of 5.3 < |η| 6.5 pseudorapidity. Combined data from T1 telescope, covering 3.1 4.7, for ⩽ final-state determined to be (70.5 ± 2.9) mb. This includes all central diffractive which maximally 0.25 mb is estimated escape detection telescopes. Based models mass diffraction, total deduced (73.7...
The prospect of pileup induced backgrounds at the High Luminosity LHC (HL-LHC) has stimulated intense interest in developing technologies for charged particle detection with accurate timing high rates. required accuracy follows directly from nominal interaction distribution within a bunch crossing ($\sigma_z\sim5$ cm, $\sigma_t\sim170$ ps). A time resolution order 20-30 ps would lead to significant reduction these backgrounds. With this goal, we present new concept called PICOSEC, which is...