A5049712728- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Particle Accelerators and Free-Electron Lasers
- High-Energy Particle Collisions Research
- Superconducting Materials and Applications
- Noncommutative and Quantum Gravity Theories
- Radioactive Decay and Measurement Techniques
- Advanced Frequency and Time Standards
- Radiation Detection and Scintillator Technologies
- Computational Physics and Python Applications
- Modular Robots and Swarm Intelligence
- Advanced NMR Techniques and Applications
- Atomic and Subatomic Physics Research
- Acoustic Wave Resonator Technologies
- Nuclear physics research studies
- Advanced Semiconductor Detectors and Materials
- Enzyme Structure and Function
- Quantum Mechanics and Applications
- Quantum chaos and dynamical systems
- Silicon and Solar Cell Technologies
- Medical Imaging Techniques and Applications
Universität Hamburg
2013-2024
Laboratoire d’Annecy de Physique des Particules
2015
Institut National de Physique Nucléaire et de Physique des Particules
2015
Centre National de la Recherche Scientifique
2015
Direction des énergies
2002
CEA Paris-Saclay
2002
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2002
A bstract The OPERA neutrino experiment at the underground Gran Sasso Laboratory has measured velocity of neutrinos from CERN CNGS beam over a baseline about 730 km. measurement is based on data taken by in years 2009, 2010 and 2011. Dedicated upgrades timing system detector, as well high precision geodesy campaign for baseline, allowed reaching comparable systematic statistical accuracies. An arrival time muon with respect to one computed assuming speed light vacuum $ \left( {6.5\pm...
A bstract The OPERA neutrino experiment is designed to perform the first observation of oscillations in direct appearance mode ν μ → τ channel, via detection -leptons created charged current interactions. detector, located underground Gran Sasso Laboratory, consists an emulsion/lead target with average mass about 1.2 kt, complemented by electronic detectors. It exposed CERN Neutrinos beam, a baseline 730 km and mean energy 17 GeV. candidate event analysis 2008-2009 sample have been reported...
The OPERA neutrino detector in the underground Gran Sasso Laboratory (LNGS) has been designed to perform first detection of oscillations direct appearance mode through study $\nu_\mu\rightarrow\nu_\tau$ channel. hybrid apparatus consists an emulsion/lead target complemented by electronic detectors and it is placed high energy long-baseline CERN LNGS beam (CNGS) 730 km away from source. Runs with CNGS neutrinos were successfully carried out 2008 2009. After a brief description beam,...
The OPERA experiment was designed to search for $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillations in appearance mode, i.e. by detecting the $\tau$-leptons produced charged current $\nu_{\tau}$ interactions. took data from 2008 2012 CERN Neutrinos Gran Sasso beam. observation of appearance, achieved with four candidate events a sub-sample data, previously reported. In this paper, fifth event, found an enlarged sample, is described. Together further reduction expected background, detected so far...
The OPERA experiment was designed to study ν_{μ}→ν_{τ} oscillations in the appearance mode CERN Gran Sasso Neutrino beam (CNGS). In this Letter, we report final analysis of full data sample collected between 2008 and 2012, corresponding 17.97×10^{19} protons on target. Selection criteria looser than previous analyses have produced ten ν_{τ} candidate events, thus reducing statistical uncertainty measurement oscillation parameters properties. A multivariate approach for event identification...
The OPERA experiment is designed to search for ${\ensuremath{\nu}}_{\ensuremath{\mu}}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{\ensuremath{\tau}}$ oscillations in appearance mode, i.e., through the direct observation of $\ensuremath{\tau}$ lepton ${\ensuremath{\nu}}_{\ensuremath{\tau}}$-charged current interactions. has taken data five years, since 2008, with CERN Neutrino Gran Sasso beam. Previously, two ${\ensuremath{\nu}}_{\ensuremath{\tau}}$ candidates a decaying into hadrons were...
A new method of momentum measurement charged particles through multiple Coulomb scattering (MCS) in the OPERA lead-emulsion target is presented. It based on precise measurements track angular deviations carried out thanks to very high resolution nuclear emulsions. The algorithm has been tested with Monte Carlo pions. results are found describe within expected uncertainties data obtained from test beams. We also present a comparison muon momenta evaluated MCS those determined by electronic...
The OPERA neutrino detector at the underground Gran Sasso Laboratory (LNGS) was designed to perform first detection of oscillations in appearance mode, through study νμ → ντ oscillations. apparatus consists a lead/emulsion-film target complemented by electronic detectors. It is placed high-energy, long-baseline CERN LNGS beam (CNGS) 730 km away from source. In August 2006, run with CNGS neutrinos successfully conducted. A sample events collected, statistically consistent integrated...
A bstract first result of the search for ν μ → e oscillations in OPERA experiment, located at Gran Sasso Underground Laboratory, is presented. The experiment looked appearance CNGS neutrino beam using data collected 2008 and 2009. Data are compatible with non-oscillation hypothesis three-flavour mixing model. further analysis same constrains non-standard oscillation parameters θ new $ \varDelta m_{\mathrm{new}}^2 suggested by LSND MiniBooNE experiments. For large values ( > 0.1 eV 2 ),...
We present a search for Lorentz violation with 8249 candidate electron antineutrino events taken by the Double Chooz experiment in 227.9 live days of running. This analysis, featuring sidereal time dependence events, is first test invariance using reactor-based source. No variation data and disappearance results are consistent independent oscillations. Under Standard-Model Extension, we set limits on 14 violating coefficients associated transitions between tau flavor, two competitive muon flavor.
The OPERA experiment is searching for nu_mu -> nu_tau oscillations in appearance mode i.e. via the direct detection of tau leptons charged current interactions. evidence has been previously reported with three candidate events using a sub-sample data from 2008-2012 runs. We report here fourth event, decaying into hadron, found after adding 2012 run without any muon final state to sample. Given number analysed and low background, are established significance 4.2sigma.
The OPERA experiment is based on a hybrid technology combining electronic detectors and nuclear emulsions. collected muon-neutrino interactions during the 2008 2009 physics runs of CNGS neutrino beam, produced at CERN with an energy range about 5-35 GeV. A total $5.3 \times 10^{19}$ protons target equivalent luminosity has been analysed detectors: scintillator strips trackers magnetic muon spectrometers equipped resistive plate gas chambers drift tubes, allowing detailed reconstruction...
The OPERA neutrino detector in the underground Gran Sasso Laboratory (LNGS) was designed to perform first detection of oscillations appearance mode through study νμ → ντ oscillations. apparatus consists an emulsion/lead target complemented by electronic detectors and it is placed high energy long-baseline CERN LNGS beam (CNGS) 730 km away from source. Runs with CNGS neutrinos were successfully carried out 2007 2008 fully operational its related facilities for emulsion handling analysis....
The OPERA experiment, designed to perform the first observation of $$\nu _\mu \rightarrow \nu _\tau $$ oscillations in appearance mode through detection $$\tau leptons produced charged current interactions, has collected data from 2008 2012. In present paper, procedure developed detect particle decays, occurring over distances order $$1~\mathrm{mm}$$ neutrino interaction point, is described detail and applied search for charmed hadrons, showing similar decay topologies as lepton. analysed...
Abstract The Scattering and Neutrino Detector at the LHC (SND@LHC) started taking data beginning of Run 3 LHC. experiment is designed to perform measurements with neutrinos produced in proton-proton collisions an energy range between 100 GeV 1 TeV. It covers a previously unexplored pseudo-rapidity $$7.2<\eta <8.4$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>7.2</mml:mn> <mml:mo><</mml:mo> <mml:mi>η</mml:mi> <mml:mn>8.4</mml:mn> </mml:mrow>...
New methods for efficient and unambiguous interconnection between electronic position sensitive detectors target units based on nuclear photographic emulsion films have been developed. The application to the OPERA experiment, that aims at detecting νμ⇌ντ oscillations in CNGS neutrino beam, is reported this paper. In order reduce background due latent tracks collected before installation detector, on-site large-scale treatments of emulsions (''refreshing'') applied. Changeable Sheet (CSd)...
The SHiP experiment is designed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at CERN SPS. An essential task keep background level less than 0.1 event after 2× 1020 protons on target. In dump, around 1011 muons will be per second. muon rate spectrometer has reduced by least four orders of magnitude avoid muon-induced combinatorial background. A novel active shield used magnetically deflect out acceptance...
The OPERA detector at the Gran Sasso underground laboratory (LNGS) was used to measure atmospheric muon charge ratio $R_{\mu}=N_{\mu^{+}}/N_{\mu^{-}}$ in TeV energy region. We analyzed 403069 muons corresponding 113.4 days of livetime during 2008 CNGS run. computed separately for single and multiple events order select different regions primary cosmic ray spectrum test R μ dependence on composition. measured values were corrected taking into account charge-misidentification errors. Data have...
The OPERA detector, designed to search for $$\nu _{\mu } \rightarrow \nu _{\tau }$$ oscillations in the CNGS beam, is located underground Gran Sasso laboratory, a privileged location study TeV-scale cosmic rays. For analysis here presented, detector was used measure atmospheric muon charge ratio TeV region. collected charge-separated ray data between 2008 and 2012. More than 3 million events were detected reconstructed, among which about 110000 multiple bundles. $$R_{\mu \equiv N_{\mu...
A bstract The OPERA experiment has discovered the tau neutrino appearance in CNGS muon beam, agreement with 3 flavour oscillation hypothesis. interaction target, made of Emulsion Cloud Chambers, was particularly efficient reconstruction electromagnetic showers. Moreover, thanks to very high granularity emulsion films, showers induced by electrons can be distinguished from those π 0 s, thus allowing detection charged current interactions electron neutrinos. In this paper results search for...
The OPERA neutrino experiment in the underground Gran Sasso Laboratory (LNGS) was designed to perform first detection of oscillations direct appearance mode ν µ → τ channel, signature being identification -lepton created its charged current interaction.
The OPERA experiment has conclusively observed the appearance of tau neutrinos in muon neutrino CNGS beam. Exploiting detector capabilities, it was possible to isolate high purity samples $\nu_{e}$, $\nu_{\mu}$ and $\nu_{\tau}$ charged current weak interactions, as well neutral interactions. In this Letter, full dataset is used for first time test three-flavor oscillation model derive constraints on existence a light sterile within framework $3+1$ model. For time, electron channels are...