A5103155872- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Nuclear reactor physics and engineering
- Radiation Effects in Electronics
- Radiation Detection and Scintillator Technologies
- Advanced Data Storage Technologies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Cosmology and Gravitation Theories
- Muon and positron interactions and applications
- Pulsars and Gravitational Waves Research
- Statistical Methods and Bayesian Inference
- Superconducting Materials and Applications
- Molten salt chemistry and electrochemical processes
- Identification and Quantification in Food
- Cellular Automata and Applications
- Distributed and Parallel Computing Systems
- Cold Atom Physics and Bose-Einstein Condensates
- Radioactive Decay and Measurement Techniques
- Scientific Research and Discoveries
- Astro and Planetary Science
- Listeria monocytogenes in Food Safety
European Organization for Nuclear Research
2011-2020
A. Alikhanyan National Laboratory
2013-2019
Universidad Nacional Autónoma de México
2010-2019
Central China Normal University
2019
University of Derby
2018
University of Catania
2017
Bielefeld University
2017
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2017
Istituto Nazionale di Fisica Nucleare, Sezione di Catania
2017
University of Bergen
2015-2016
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...
Machine learning is an important applied research area in particle physics, beginning with applications to high-level physics analysis the 1990s and 2000s, followed by explosion of event identification reconstruction 2010s. In this document we discuss promising future development areas machine a roadmap for their implementation, software hardware resource requirements, collaborative initiatives data science community, academia industry, training community science. The main objective connect...
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...
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 NA60 experiment at the CERN SPS has studied low-mass dimuon production in 158A GeV In-In collisions. An excess of pairs above known meson decays been reported before. We now present precision results on associated transverse momentum spectra. slope parameter Teff extracted from spectra rises with mass up to ρ, followed by a sudden decline above. While initial rise is consistent expectations for radial flow hadronic decay source, signals transition an emission source much smaller flow....
The NA60 experiment at the CERN SPS has measured muon pairs with unprecedented precision in 158A GeV In-In collisions. A strong excess of above known sources is observed whole mass region 0.2 rho -> mu+mu- annihilation. associated spectral function shows a broadening, but essentially no shift mass. For M>1 GeV, found to be prompt, not due enhanced charm production, pronounced differences Drell-Yan pairs. slope parameter Teff transverse momentum spectra rises up rho, followed by sudden...
The NA60 experiment studied low-mass muon pair production in proton–nucleus (p–A) collisions using a 400 GeV proton beam at the CERN SPS. dimuon spectrum is well described by superposition of two-body and Dalitz decays light neutral mesons η, ρ, ω, η′ ϕ, no evidence in-medium effects found. A new high-precision measurement electromagnetic transition form factors η ω was performed, profiting from 10 times larger data sample than peripheral In–In previously collected NA60. Using...
The ALICE experiment has been taking data since 2009, with proton and lead beams. In this paper, the different particle identification techniques used by are briefly reviewed. current results on identified spectra in pp collisions at 7 TeV, Pb–Pb summarized. particular, energy dependence of spectral shapes ratios is discussed compared to previous experiments commonly Monte Carlo models. baryon/meson ratio Λ/K0S studied as a function transverse momentum centrality, it results. evolution...
Machine learning has been applied to several problems in particle physics research, beginning with applications high-level analysis the 1990s and 2000s, followed by an explosion of event identification reconstruction 2010s. In this document we discuss promising future research development areas for machine physics. We detail a roadmap their implementation, software hardware resource requirements, collaborative initiatives data science community, academia industry, training community science....
The NA60 experiment at the CERN SPS has studied dimuon production in 158A GeV In-In collisions. strong excess of pairs above known sources found complete mass region 0.2<M<2.6 previously been interpreted as thermal radiation. We now present first results on associated angular distributions. Using Collins-Soper reference frame, structure function parameters \lambda, \mu and \nu are measured to be zero, projected distributions polar azimuth angles uniform. absence any polarization is...
The NA60 experiment has measured muon pair production in In-In collisions at 158 AGeV the CERN SPS. This paper presents a high statistics measurement of $ϕ\toμμ$ meson production. Differential spectra, yields, mass and width are as function centrality compared to previous measurements other colliding systems same energy. rapidity distribution is found be constant centrality, compatible with results. decay polar angle several reference frames. No evidence polarization transverse momentum...
The NA60 experiment at the CERN SPS has studied low-mass muon pairs in 158 AGeV In–In collisions. A strong excess of is observed above yield expected from neutral meson decays. unprecedented sample size close to 400K events and good mass resolution about 2% have made it possible isolate by subtraction decay sources (keeping ρ). shape resulting spectrum exhibits considerable broadening, but essentially no shift mass. acceptance-corrected transverse-momentum spectra a atypical for radial flow...