A. Kappes

ORCID: 0000-0003-1315-3711
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About
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Research Areas
  • Astrophysics and Cosmic Phenomena
  • Neutrino Physics Research
  • Dark Matter and Cosmic Phenomena
  • Radio Astronomy Observations and Technology
  • Particle physics theoretical and experimental studies
  • Gamma-ray bursts and supernovae
  • High-Energy Particle Collisions Research
  • Quantum Chromodynamics and Particle Interactions
  • Pulsars and Gravitational Waves Research
  • Radio Wave Propagation Studies
  • Particle Detector Development and Performance
  • Particle accelerators and beam dynamics
  • Atmospheric Ozone and Climate
  • Gyrotron and Vacuum Electronics Research
  • Solar and Space Plasma Dynamics
  • Computational Physics and Python Applications
  • Ionosphere and magnetosphere dynamics
  • Radiation Detection and Scintillator Technologies
  • Scientific Research and Discoveries
  • Acoustic Wave Phenomena Research
  • Precipitation Measurement and Analysis
  • Particle Accelerators and Free-Electron Lasers
  • Cryospheric studies and observations
  • Arctic and Antarctic ice dynamics
  • Tropical and Extratropical Cyclones Research

University of Münster
2016-2025

University of Alaska Anchorage
2007-2024

Providence College
2007-2024

The University of Texas at Arlington
2018-2024

Lawrence Berkeley National Laboratory
2023-2024

Southern University and Agricultural and Mechanical College
2013-2024

Clark Atlanta University
2013-2024

Johannes Gutenberg University Mainz
2018-2024

University of Wisconsin–Madison
2007-2023

UCLouvain
2023

In this paper, a time-integrated search for point sources of cosmic neutrinos is presented using the data collected from 2007 to 2010 by ANTARES neutrino telescope. No statistically significant signal has been found and upper limits on flux have obtained. Assuming an E−2ν spectrum, these are at 1–10 ×10−8 GeV cm−2 s−1 declinations ranging −90° 40°. Limits specific models RX J1713.7−3946 Vela X, which include information source morphology also given.

10.1088/0004-637x/760/1/53 article EN The Astrophysical Journal 2012-11-02

A search for high-energy neutrinos coming from the direction of Sun has been performed using data recorded by ANTARES neutrino telescope during 2007 and 2008. The selection criteria have chosen to maximize possible signals produced self-annihilation weakly interacting massive particles accumulated in centre with respect atmospheric background. After unblinding, number observed towards was found be compatible background expectations. $90\%$ CL upper limits terms spin-dependent...

10.1088/1475-7516/2013/11/032 article EN Journal of Cosmology and Astroparticle Physics 2013-11-13

Next-to-leading-order QCD analyses of the ZEUS data on deep inelastic scattering together with fixed-target have been performed, from which gluon and quark densities proton value strong coupling constant αs(MZ) were extracted. The study includes a full treatment experimental systematic uncertainties including point-to-point correlations. resulting in parton density functions are presented. A combined fit for yields agreement world average. derived alone indicate importance HERA determining...

10.1103/physrevd.67.012007 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 2003-01-31

The recent progress made in Galactic γ-ray astronomy using the High Energy Stereoscopic System (H.E.S.S.) instrument provides for first time a population of TeV γ-rays, and hence potential neutrino sources, which flux can be estimated. Using energy spectra source morphologies measured by H.E.S.S., together with new parameterizations pion production decay hadronic interactions, we estimate signal background rates expected these sources first-generation water Cerenkov detector (ANTARES)...

10.1086/508936 article EN The Astrophysical Journal 2007-02-14

The ANTARES neutrino telescope, located 40km off the coast of Toulon in Mediterranean Sea at a mooring depth about 2475m, consists twelve detection lines equipped typically with 25 storeys. Every storey carries three optical modules that detect Cherenkov light induced by charged secondary particles (typically muons) coming from interactions. As these are flexible structures fixed to sea bed and held taut buoy, currents cause move storeys rotate. knowledge position precision better than 10cm...

10.1088/1748-0221/7/08/t08002 article EN Journal of Instrumentation 2012-08-14

The data taken with the ANTARES neutrino telescope from 2007 to 2010, a total live time of 863 days, are used measure oscillation parameters atmospheric neutrinos. Muon tracks reconstructed energies as low 20 GeV. Neutrino oscillations will cause suppression vertical upgoing muon neutrinos such crossing Earth. determining extracted by fitting event rate function ratio estimated energy and flight path through Measurement contours in two-flavour approximation derived. Assuming maximal mixing,...

10.1016/j.physletb.2012.07.002 article EN cc-by Physics Letters B 2012-07-05

The deep ocean is the largest and least known ecosystem on Earth. It hosts numerous pelagic organisms, most of which are able to emit light. Here we present a unique data set consisting 2.5-year long record light emission by deep-sea measured from December 2007 June 2010 at ANTARES underwater neutrino telescope in NW Mediterranean Sea, jointly with synchronous hydrological records. This longest continuous time-series bioluminescence ever recorded. Our reveals several weeks long, seasonal...

10.1371/journal.pone.0067523 article EN cc-by PLoS ONE 2013-07-10

A search for muon neutrinos in coincidence with gamma-ray bursts the ANTARES neutrino detector using data from end of 2007 to 2011 is performed. Expected fluxes are calculated each burst individually. The most recent numerical calculations spectra NeuCosmA code employed, which include Monte Carlo simulations full underlying photohadronic interaction processes. discovery probability a selection 296 given period optimised an extended maximum-likelihood strategy. No significant excess over...

10.1051/0004-6361/201322169 article EN Astronomy and Astrophysics 2013-08-30

The photoproduction reaction gamma p -> mu+ mu- has been studied in ep interactions using the ZEUS detector at HERA. data sample corresponds to an integrated luminosity of 43.2 pb^{-1}. Upsilon meson observed for first time. sum products elastic Upsilon(1S), Upsilon(2S), Upsilon(3S) cross sections with their respective branching ratios is determined be 13.3 +- 6.0(stat.)^{+2.7}_{-2.3}(syst.) pb a mean photon-proton centre mass energy 120 GeV. section above prediction perturbative QCD model.

10.1016/s0370-2693(98)01081-8 article EN cc-by-nc-nd Physics Letters B 1998-10-01

Inclusive production of D*± (2010) mesons in deep inelastic scattering has been measured with the ZEUS detector at DESY HERA using an integrated luminosity 81.9 pb−1. The decay channel D*+→D0π+ D0→K−π+ and corresponding antiparticle were used to identify D* mesons. Differential cross sections 1.5<Q2<1000GeV2 0.02<y<0.7 kinematic region 1.5<pT(D*)<15GeV |η(D*)|<1.5 are compared different QCD calculations incorporating parametrizations parton densities proton. data show sensitivity gluon...

10.1103/physrevd.69.012004 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 2004-01-30

10.1016/j.nima.2010.09.053 article EN Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 2010-09-22

Results are presented of a search for cosmic sources high energy neutrinos with the ANTARES neutrino telescope. The data were collected during 2007 and 2008 using detector configurations containing between 5 12 detection lines. integrated live time analyzed is 304 days. Muon tracks reconstructed likelihood-based algorithm. Studies timing indicate median angular resolution 0.5 +/- 0.1 degrees. flux sensitivity 7.5 x 10-8 ~ (E/GeV)^-2 GeV^-1 s^-1 cm^-2 part sky that always visible (declination...

10.1088/2041-8205/743/1/l14 article EN The Astrophysical Journal Letters 2011-11-21

Atmospheric neutrinos are produced during cascades initiated by the interaction of primary cosmic rays with air nuclei. In this paper, a measurement atmospheric \nu_\mu + \bar{\nu}_\mu energy spectrum in range 0.1 - 200 TeV is presented, using data collected ANTARES underwater neutrino telescope from 2008 to 2011. Overall, measured flux ~25% higher than predicted conventional flux, and compatible measurements reported ice. The single power-law dependence spectral index \gamma_{meas}=3.58\pm...

10.1140/epjc/s10052-013-2606-4 article EN cc-by The European Physical Journal C 2013-10-01

Inclusive jet differential cross sections have been measured in neutral current deep inelastic e+p scattering for boson virtualities Q2>125 GeV2. The data were taken using the ZEUS detector at HERA and correspond to an integrated luminosity of 38.6 pb−1. Jets identified Breit frame longitudinally invariant kT cluster algorithm. Measurements inclusive are presented as functions transverse energy (EBT,jet), pseudorapidity Q2, jets with EBT,jet>8 GeV. Next-to-leading-order QCD calculations...

10.1016/s0370-2693(02)02763-6 article EN cc-by Physics Letters B 2002-11-01
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