Refine
Year of publication
- 2019 (283) (remove)
Document Type
- Article (129)
- Preprint (110)
- Doctoral Thesis (21)
- Conference Proceeding (17)
- Contribution to a Periodical (4)
- Habilitation (1)
- Master's Thesis (1)
Has Fulltext
- yes (283) (remove)
Is part of the Bibliography
- no (283)
Keywords
- Hadron-Hadron scattering (experiments) (4)
- Heavy Ion Experiments (4)
- Heavy-ion collisions (4)
- ALICE (3)
- LHC (2)
- Lattice QCD (2)
- NA61/SHINE (2)
- Phase Diagram of QCD (2)
- QCD equation of state (2)
- QCD phase diagram (2)
- Quasi-free scattering (2)
- elliptic flow (2)
- gravitational wave (2)
- heavy-ion collisions (2)
- (Anti-)(Hyper-)Nuclei (1)
- 3D printing (1)
- 4-ROD RFQ (1)
- Accelerators & Beams (1)
- Actuators (1)
- Antimatter (1)
- Arms (1)
- Atomic and molecular interactions with photons (1)
- Atomic, Molecular & Optical (1)
- Binary Neutron Star Mergers (1)
- Biological locomotion (1)
- Boltzmann-Vlasov equation (1)
- Bottomonium (1)
- Bubble-like structure (1)
- CBM (1)
- CBM experiment (1)
- CERN SPS (1)
- CLVisc (1)
- CMOS (1)
- CMOS Monolithic Active Pixel Sensor (1)
- Charmonium (1)
- Chemical physics (1)
- Chiral Lagrangians (1)
- Chiral phase transition (1)
- Color screening (1)
- Cross sections (1)
- Design, synthesis and processing (1)
- Dielectron (1)
- Diffusion (1)
- Direct nuclear reactions (1)
- Discontinous Galerkin methods for Numerical Relativity (1)
- Drip-line nucleus (1)
- Dynamical systems (1)
- Effective QCD model (1)
- Eingebettetes optisches System (1)
- Einplatinene Kamera (1)
- Electromagnetic probes (1)
- Electronic properties and materials (1)
- Exotica (1)
- Final state (1)
- Flow (1)
- Formulations of Einstein Field Equations (1)
- Free-electron lasers (1)
- Fringe field (1)
- GRMHD (1)
- Gap field (1)
- GdIr2Si2 (1)
- General properties of QCD (dynamics, confinement, etc.) (1)
- General relativistic hydrodynamics (1)
- Gluons (1)
- Heavy Ion Collisions (1)
- Heavy Ion Phenomenology (1)
- Heavy ion storage ring (1)
- Heavy-Ion Collision (1)
- Heavy-flavour production (1)
- Heavy-ion (1)
- Heavy-ion collision (1)
- IPGLASMA (1)
- Infrared light (1)
- Initial state (1)
- Inverse kinematics (1)
- J/ψ (1)
- Ladder-RFQ (1)
- Laminar flow (1)
- Langmuir-Blodgett monolayer (1)
- Laser-produced plasmas (1)
- Light (1)
- Magnetic properties and materials (1)
- Mechanical engineering (1)
- Multiple Charge Conservation (1)
- Nanophotonics and plasmonics (1)
- Nanowires (1)
- New magicity (1)
- Nichtinvasiv (1)
- Nonequilibrium dynamics (1)
- Nuclear Physics (1)
- Nuclear astrophysics (1)
- Nuclear physics of explosive environments (1)
- Nuclear reactions (1)
- One-nucleon removal (1)
- Orbital electron capture (1)
- Other nonperturbative calculations (1)
- Pairing reentrance (1)
- Particle correlations and fluctuations (1)
- Parton cascade BAMPS (1)
- Path integral duality (1)
- Phase transitions and critical phenomena (1)
- Pixel detector (1)
- Plasma-based accelerators (1)
- Plasmons Quantum mechanics (1)
- Polarization (1)
- Production mechanisms (1)
- Prototypes (1)
- QCD Phenomenology (1)
- QCD phase transition (1)
- QGP (1)
- Quantum corrected black hole (1)
- Quantum modified Gravity (1)
- Quark-Gluon Plasma (1)
- Quark-Gluon-Plasma (1)
- RFQ (1)
- RHIC (1)
- Radiation Tolerance (1)
- Radiation detectors (1)
- Radiative capture (1)
- Regeneration (1)
- Robotic behavior (1)
- Robots (1)
- Self-triggered front-end electronics (1)
- Shell model (1)
- Silicon tracking system (1)
- Single particle decay spectroscopy (1)
- Small systems (1)
- Spectators (1)
- Spectroscopic factors (1)
- Strangeness (1)
- String T-duality (1)
- Sub-wavelength optics (1)
- Thermoplasma acidophilum (1)
- Thermoplasma volcanium (1)
- TmRh2Si2 (1)
- Toroidales Magnetfeld (1)
- Transport Theory (1)
- Two body weak decay (1)
- Two-dimensional materials (1)
- Vertex Detector (1)
- Wigner function (1)
- Zero-point length (1)
- active perception (1)
- additive manufacturing (1)
- anisotropic azimuthal correlation (1)
- anisotropic flow (1)
- atomic force microscopy (1)
- autonomous learning (1)
- bacteriorhodopsin reconstitution (1)
- baryon stopping (1)
- binary neutron star merger (1)
- binary neutron star mergers (1)
- binocular vision (1)
- black lipid membrane (1)
- blue bronze (1)
- bulk observables (1)
- charge density wave (1)
- chiral effect (1)
- cluster expansion model (1)
- coherent emission (1)
- continuum model (1)
- correlated electrons (1)
- correlations (1)
- deep learning (1)
- directed flow (1)
- early diabetes detection (1)
- efficient coding (1)
- electro-magnetic plasma (1)
- electromagnetic fields (1)
- electromagnetic probes (1)
- endoplasmic reticulum (1)
- equation of state (1)
- extra dimensions (1)
- finite baryon density (1)
- flux growth (1)
- focused electron beam induced deposition (1)
- focused electron beam-induced deposition (1)
- functional principal component analysis (1)
- global jets (1)
- gravitational waves (1)
- hadron gas (1)
- hadron transport (1)
- hadron-quark phase transition (1)
- heavy ion collision (1)
- heavy ion collisions (1)
- heavy ions (1)
- helical magnetic fields (1)
- high energy astrophysics (1)
- high energy physics (1)
- higher twist effects (1)
- hot spots (1)
- hybrid star (1)
- hydrogen energy levels (1)
- hyperons (1)
- initial state (1)
- intrinsic motivation (1)
- jets (1)
- kink-like instability (1)
- light nuclei (1)
- light-driven ATP synthesis (1)
- liposomes (1)
- machine learning (1)
- magnetism (1)
- main phospholipid (1)
- millimeter-wave spectroscopy (1)
- minimal length (1)
- modified Coulomb potential (1)
- multiparton interactions (1)
- mushroom instability (1)
- music charts (1)
- nano-fabrication (1)
- nano-printing (1)
- neutron star (1)
- neutron star properties (1)
- neutron-star-merger (1)
- non-invasive diagnosis techniques (1)
- nucleon coalescence (1)
- numerical relativity (1)
- optokinetic nystagmus (1)
- oxysterol-binding protein homology protein (1)
- parity-doublet model (1)
- particle-in-cell simulations (1)
- phase transition (1)
- phonon (1)
- phosphatidylinositol 4-phosphate 5-kinase (1)
- phosphatidylserine (1)
- plasma membrane (1)
- precursor residence time (1)
- proton permeability (1)
- quark matter (1)
- quark‐gluon plasm (1)
- recollimation shocks (1)
- relativistic astrophysics (1)
- relativistic heavy ion reactions (1)
- relativistic heavy-ion collisions (1)
- relativistic hydrodynamics (1)
- relativistic jets (1)
- resonance properties (1)
- scanning probe microscopy (1)
- self-organized criticalit (1)
- small systems (1)
- smooth pursuit (1)
- social acceleration (1)
- spectators (1)
- spin polarization (1)
- sterol (1)
- string T-duality (1)
- string fragmentation (1)
- sustained hyperglycemia (1)
- terahertz (1)
- tetraether lipid (1)
- the Weibel instability (1)
- time scales (1)
- time-resolved (1)
- tip fabrication (1)
- total cross-section (1)
- transport models (1)
- transport theory (1)
- triangular flow (1)
- unsaturated phospholipid (1)
- viscosity (1)
- viscous hydrodynamics (1)
- zero-point length (1)
Institute
- Physik (283) (remove)
We investigate the role of the Pauli Exclusion Principle (PEP) for light nuclei, at the examples of 12C and 16O. We show that ignoring the PEP does lead not only to a too dense spectrum at low energy but also to a wrong grouping into bands. Using a geometrical mapping, a triangular structure for 12C and a tetrahedral structure in 16O in the ground state is obtained by using the indistinguishably of the α-particles.
Based on the positive results of the 0.63 m unmodulated 325 MHz Ladder-RFQ prototype from 2013 to 2016 [1, 2], a modulated 3.3m Ladder-RFQ (s. Fig. 1) has been designed and built for the acceleration of up to 100 mA protons from 95 keV to 3.0 MeV at the FAIR p-Linac [3, 4]. In this paper, we will show the results of manufacturing as well as low level RF measurements of the Ladder-RFQ including flatness and frequency tuning.
LICE is one of the four major LHC experiments at CERN. When the accelerator enters the Run 3 data-taking period, starting in 2021, ALICE expects almost 100 times more Pb-Pb central collisions than now, resulting in a large increase of data throughput. In order to cope with this new challenge, the collaboration had to extensively rethink the whole data processing chain, with a tighter integration between Online and Offline computing worlds. Such a system, code-named ALICE O2, is being developed in collaboration with the FAIR experiments at GSI. It is based on the ALFA framework which provides a generalized implementation of the ALICE High Level Trigger approach, designed around distributed software entities coordinating and communicating via message passing.
We will highlight our efforts to integrate ALFA within the ALICE O2 environment. We analyze the challenges arising from the different running environments for production and development, and conclude on requirements for a flexible and modular software framework. In particular we will present the ALICE O2 Data Processing Layer which deals with ALICE specific requirements in terms of Data Model. The main goal is to reduce the complexity of development of algorithms and managing a distributed system, and by that leading to a significant simplification for the large majority of the ALICE users.
We explore the phase structure of the 1+1 dimensional Gross-Neveu model at finite number of fermion flavors using lattice field theory. Besides a chirally symmetric phase and a homogeneously broken phase we find evidence for the existence of an inhomogeneous phase, where the condensate is a spatially oscillating function. Our numerical results include a crude μ-T phase diagram.
Critical spin liquid versus valence-bond glass in a triangular-lattice organic antiferromagnet
(2019)
In the quest for materials with unconventional quantum phases, the organic triangular-lattice antiferromagnet κ-(ET)2Cu2(CN)3 has been extensively discussed as a quantum spin liquid (QSL) candidate. The description of its low temperature properties has become, however, a particularly challenging task. Recently, an intriguing quantum critical behaviour was suggested from low-temperature magnetic torque experiments. Here we highlight significant deviations of the experimental observations from a quantum critical scenario by performing a microscopic analysis of all anisotropic contributions, including Dzyaloshinskii–Moriya and multi-spin scalar chiral interactions. Instead, we show that disorder-induced spin defects provide a comprehensive explanation of the low-temperature properties. These spins are attributed to valence bond defects that emerge spontaneously as the QSL enters a valence-bond glass phase at low temperature. This theoretical treatment is applicable to a general class of frustrated magnetic systems and has important implications for the interpretation of magnetic torque, nuclear magnetic resonance, thermal transport and thermodynamic experiments.
The production of the Λ(1520) baryonic resonance has been measured at midrapidity in inelastic pp collisions at s√ = 7 TeV and in p-Pb collisions at sNN−−−√ = 5.02 TeV for non-single diffractive events and in multiplicity classes. The resonance is reconstructed through its hadronic decay channel Λ(1520) → pK− and the charge conjugate with the ALICE detector. The integrated yields and mean transverse momenta are calculated from the measured transverse momentum distributions in pp and p-Pb collisions. The mean transverse momenta follow mass ordering as previously observed for other hyperons in the same collision systems. A Blast-Wave function constrained by other light hadrons (π, K, K0S, p, Λ) describes the shape of the Λ(1520) transverse momentum distribution up to 3.5 GeV/c in p-Pb collisions. In the framework of this model, this observation suggests that the Λ(1520) resonance participates in the same collective radial flow as other light hadrons. The ratio of the yield of Λ(1520) to the yield of the ground state particle Λ remains constant as a function of charged-particle multiplicity, suggesting that there is no net effect of the hadronic phase in p-Pb collisions on the Λ(1520) yield.
Measurement of the inclusive J/ψ polarization at forward rapidity in pp collisions at √s = 8 TeV
(2019)
We report on the measurement of the inclusive J/ψ polarization parameters in pp collisions at a center of mass energy s√=8 TeV with the ALICE detector at the LHC. The analysis is based on a data sample corresponding to an integrated luminosity of 1.23 pb−1. J/ψ resonances are reconstructed in their di-muon decay channel in the rapidity interval 2.5<y<4.0 and over the transverse-momentum interval 2<pT<15 GeV/c. The three polarization parameters (λθ, λφ, λθφ) are measured as a function of pT both in the helicity and Collins-Soper reference frames. The measured J/ψ polarization parameters are found to be compatible with zero within uncertainties, contrary to expectations from all available predictions. The results are compared with the measurement in pp collisions at s√=7 TeV.
ϕ meson measurements provide insight into strangeness production, which is one of the key observables for the hot medium formed in high-energy heavy-ion collisions. ALICE measured ϕ production through its decay in muon pairs in Pb-Pb collisions at sNN−−−√ = 2.76 TeV in the intermediate transverse momentum range 2<pT<5 GeV/c and in the rapidity interval 2.5<y<4. The ϕ yield was measured as a function of the transverse momentum and collision centrality. The nuclear modification factor was obtained as a function of the average number of participating nucleons. Results were compared with the ones obtained via the kaon decay channel in the same pT range at midrapidity. The values of the nuclear modification factor in the two rapidity regions are in agreement within uncertainties.
The elliptic (v2), triangular (v3), and quadrangular (v4) flow coefficients of π±, K±, p+p¯¯¯, Λ+Λ¯¯¯¯, K0S, and the ϕ-meson are measured in Pb-Pb collisions at sNN−−−√=5.02 TeV. Results obtained with the scalar product method are reported for the rapidity range |y|< 0.5 as a function of transverse momentum, pT, at different collision centrality intervals between 0-70%, including ultra-central (0-1%) collisions for π±, K±, and p+p¯¯¯. For pT<3 GeV/c, the flow coefficients exhibit a particle mass dependence. At intermediate transverse momenta (3<pT<~8-10 GeV/c), particles show an approximate grouping according to their type (i.e., mesons and baryons). The ϕ-meson v2, which tests both particle mass dependence and type scaling, follows p+p¯¯¯ v2 at low pT and π± v2 at intermediate pT. The evolution of the shape of vn(pT) as a function of centrality and harmonic number n is studied for the various particle species. Flow coefficients of π±, K±, and p+p¯¯¯ for pT<3 GeV/c are compared to iEBE-VISHNU and MUSIC hydrodynamical calculations coupled to a hadronic cascade model (UrQMD). The iEBE-VISHNU calculations describe the results fairly well for pT<2.5 GeV/c, while MUSIC calculations reproduce the measurements for pT<1 GeV/c. A comparison to vn coefficients measured in Pb-Pb collisions at sNN−−−√ = 2.76 TeV is also provided.
Measurements of anisotropic flow coefficients with two- and multi-particle cumulants for inclusive charged particles in Pb-Pb collisions at sNN−−−√=5.02 and 2.76 TeV are reported in the pseudorapidity range |η|<0.8 and transverse momentum 0.2<pT<50 GeV/c. The full data sample collected by the ALICE detector in 2015 (2010), corresponding to an integrated luminosity of 12.7 (2.0) μb−1 in the centrality range 0-80%, is analysed. Flow coefficients up to the sixth flow harmonic (v6) are reported and a detailed comparison among results at the two energies is carried out. The pT dependence of anisotropic flow coefficients and its evolution with respect to centrality and harmonic number n are investigated. An approximate power-law scaling of the form vn(pT)∼pn/3T is observed for all flow harmonics at low pT (0.2<pT<3 GeV/c). At the same time, the ratios vn/vn/mm are observed to be essentially independent of pT for most centralities up to about pT=10 GeV/c. Analysing the differences among higher-order cumulants of elliptic flow (v2), which have different sensitivities to flow fluctuations, a measurement of the standardised skewness of the event-by-event v2 distribution P(v2) is reported and constraints on its higher moments are provided. The Elliptic Power distribution is used to parametrise P(v2), extracting its parameters from fits to cumulants. The measurements are compared to different model predictions in order to discriminate among initial-state models and to constrain the temperature dependence of the shear viscosity to entropy-density ratio.