E. Radermacher
A5073681705- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Particle Accelerators and Free-Electron Lasers
- Nuclear physics research studies
- Neutrino Physics Research
- Superconducting Materials and Applications
- Dark Matter and Cosmic Phenomena
- Muon and positron interactions and applications
- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Radioactive Decay and Measurement Techniques
- Nuclear reactor physics and engineering
- Atomic and Molecular Physics
- X-ray Spectroscopy and Fluorescence Analysis
- Astrophysics and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Radiation Therapy and Dosimetry
- Radiation Effects in Electronics
- Advanced NMR Techniques and Applications
- Quantum, superfluid, helium dynamics
- Advanced Chemical Physics Studies
Institute of High Energy Physics
2024
A. Alikhanyan National Laboratory
2024
European Organization for Nuclear Research
2013-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
1973-2016
University of Siena
2013
Centre National de la Recherche Scientifique
2006-2011
Université Clermont Auvergne
2011
Campbell Collaboration
2011
Institut National de Physique Nucléaire et de Physique des Particules
2006
University of Cologne
1995-1998
We report on a precision measurement of low-mass muon pairs in 158 AGeV indium-indium collisions at the CERN SPS. A significant excess is observed above yield expected from neutral meson decays. The unprecedented sample size 360 000 dimuons and good mass resolution about 2% allow us to isolate by subtraction decay sources. shape resulting spectrum consistent with dominant contribution...
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 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...
The NA60 experiment at the CERN SPS has studied low-mass muon pairs in 158A GeV In-In collisions. mass and pT spectra associated with peripheral collisions can quantitatively be described by known neutral meson decays. high data quality allowed to remeasure electromagnetic transition form factors of Dalitz decays η-> μ^+μ^-γand ω-> μ^+μ^-π^0. Using usual pole approximation F = (1-M_{μμ}^{2}/Λ^{2})^{-1} for factors, we find Λ^{-2} (in GeV^{-2}) 1.95+-0.17(stat.)+-0.05(syst.) ηand...
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|...
The TOTEM collaboration has measured the proton–proton total cross section at $$\sqrt{s}=13~\hbox {TeV}$$ with a luminosity-independent method. Using dedicated $$\beta ^{*}=90~\hbox {m}$$ beam optics, Roman Pots were inserted very close to beam. inelastic scattering rate been by T1 and T2 telescopes during same LHC fill. After applying optical theorem is $$\sigma _\mathrm{tot}=(110.6~\pm ~3.4$$ ) mb, well in agreement extrapolation from lower energies. This method also allows one derive...
Abstract The TOTEM experiment at the LHC has performed first measurement $$\sqrt{s} = 13\,\mathrm{TeV}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>13</mml:mn><mml:mspace /><mml:mi>TeV</mml:mi></mml:mrow></mml:math> of $$\rho $$ xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>ρ</mml:mi></mml:math> parameter, real to imaginary ratio nuclear elastic scattering amplitude $$t=0$$...
The TOTEM collaboration has measured the elastic proton-proton differential cross section ${\rm d}\sigma/{\rm d}t$ at $\sqrt{s}=13$ TeV LHC energy using dedicated $\beta^{*}=90$ m beam optics. Roman Pot detectors were inserted to 10$\sigma$ distance from beam, which allowed measurement of range $[0.04$ GeV$^{2}$$; 4 $GeV$^{2}$$]$ in four-momentum transfer squared $|t|$. efficient data acquisition collect about 10$^{9}$ events precisely measure cross-section including diffractive minimum...
The NA60 experiment studies muon pair production at the CERN Super Proton Synchrotron. In this Letter we report on a precision measurement of J/ψ in In-In collisions. We have studied centrality distribution, and compared it with one expected if absorption cold nuclear matter were only active suppression mechanism. For collisions involving more than ∼80 participant nucleons, find that an extra is present. This result qualitative agreement previous Pb-Pb measurements by NA50 experiment, but no...
The yield of muon pairs in the invariant mass region 1
The TOTEM collaboration has measured the proton-proton total cross section at $\sqrt{s}=13$ TeV with a luminosity-independent method. Using dedicated $β^{*}=90$ m beam optics, Roman Pots were inserted very close to beam. inelastic scattering rate been by T1 and T2 telescopes during same LHC fill. After applying optical theorem is $σ_{\rm tot}=(110.6 \pm 3.4$) mb, well in agreement extrapolation from lower energies. This method also allows one derive elastic sections: el} = (31.0 1.7)$ mb...
The TOTEM experiment at the CERN LHC has measured elastic proton-proton scattering centre-of-mass energy $\sqrt{s}$ = 8 TeV and four-momentum transfers squared, |t|, from 6 x $10^{-4}$ GeV$^2$ to 0.2 GeV$^2$. Near lower end of |t|-interval differential cross-section is sensitive interference between hadronic electromagnetic amplitudes. This article presents measurement constraints it imposes on functional forms modulus phase amplitude. data exclude traditional Simplified West Yennie formula...
Abstract The proton–proton elastic differential cross section $${\mathrm{d}}\sigma /{\mathrm{d}}t$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>d</mml:mi><mml:mi>σ</mml:mi><mml:mo>/</mml:mo><mml:mi>d</mml:mi><mml:mi>t</mml:mi></mml:mrow></mml:math> has been measured by the TOTEM experiment at $$\sqrt{s}=2.76\hbox { TeV}$$...