S. Wallner

ORCID: 0000-0002-9105-1625
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About
Contact & Profiles
Research Areas
  • Particle physics theoretical and experimental studies
  • Quantum Chromodynamics and Particle Interactions
  • High-Energy Particle Collisions Research
  • Computational Physics and Python Applications
  • Neutrino Physics Research
  • Particle Detector Development and Performance
  • Black Holes and Theoretical Physics
  • Dark Matter and Cosmic Phenomena
  • Cold Atom Physics and Bose-Einstein Condensates
  • Particle Accelerators and Free-Electron Lasers
  • Medical Imaging Techniques and Applications
  • Atomic and Subatomic Physics Research
  • GNSS positioning and interference
  • Nuclear physics research studies
  • Quantum, superfluid, helium dynamics
  • advanced mathematical theories
  • Superconducting Materials and Applications
  • Calibration and Measurement Techniques
  • NMR spectroscopy and applications
  • Gamma-ray bursts and supernovae
  • Stochastic processes and statistical mechanics
  • Random Matrices and Applications
  • Atmospheric and Environmental Gas Dynamics
  • Advanced optical system design
  • International Science and Diplomacy

Technical University of Munich
2015-2024

European Space Agency
2024

Max Planck Institute for Physics
2022-2024

Max Planck Computing and Data Facility
2024

University of Aveiro
2017-2023

A. Alikhanyan National Laboratory
2023

Campbell Collaboration
2018-2023

University of Turin
2016-2020

Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2016-2020

OSRAM (Germany)
2005

A new kind of LED light source with high brightness levels suitable for use in ultra-compact projection devices was developed. We present a unique chip technology and the correctly matched package design that enable superior performance discuss all aspects using this application.

10.1889/1.2036344 article EN SID Symposium Digest of Technical Papers 2005-01-01

The Time and Geodetic Validation Facility (TGVF) has played an important role in the System integration verification performance monitoring of Galileo during its deployment phase. Now moved into exploitation phase TGVF become a key asset to support improvements providing early prototyping experimentation, as well assessment. This is for instance case use environment proof concept future computation User Range Accuracy (URA) System. Several URA algorithms have been prototyped tested. shown be...

10.33012/2020.17763 article EN Proceedings of the Satellite Division's International Technical Meeting (Online)/Proceedings of the Satellite Division's International Technical Meeting (CD-ROM) 2020-10-28

It is long known that interference effects play an important role in understanding the shape of $\pi^+\pi^-$ spectrum resonances near threshold. In this manuscript we investigate $\rho-\omega$ study semileptonic $B \to \pi^+ \pi^- \ell \bar \nu_\ell$ decays. We determine for first time strong phase between \rho^0 and \omega from a recent Belle measurement $m_{\pi\pi}$ \nu_\ell$. find $ \phi_{\rho-\omega} = \left( -46_{-67}^{+155} \right)\unicode{xb0}$ extract branching fraction...

10.48550/arxiv.2401.08779 preprint EN other-oa arXiv (Cornell University) 2024-01-01

It is long known that interference effects play an important role in understanding the shape of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>π</a:mi><a:mo>+</a:mo></a:msup><a:msup><a:mi>π</a:mi><a:mo>−</a:mo></a:msup></a:math> spectrum resonances near threshold. In this manuscript, we investigate <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mrow><c:mi>ρ</c:mi><c:mtext>−</c:mtext><c:mi>ω</c:mi></c:mrow></c:math> study...

10.1103/physrevd.109.074040 article EN cc-by Physical review. D/Physical review. D. 2024-04-30

COMPASS is a multi-purpose fixed-target experiment at CERN aimed studying the structure and spectrum of hadrons. It has collected so far world's largest data set on diffractive production $K^-π^-π^+$ decay, which in principle gives access to all kaon states. We performed an elaborate partial-wave analysis, using model-selection techniques select wave based large systematically constructed pool allowed partial waves. The decomposition reveals signals mass region well-known states, such as...

10.48550/arxiv.1911.13079 preprint EN other-oa arXiv (Cornell University) 2019-01-01

COMPASS is a multi-purpose fixed-target experiment at CERN aimed studying the structure and spectrum of hadrons.It has collected so far world's largest data set on diffractive production K -π + decay, which in principle gives access to all kaon states.We performed an elaborate partial-wave analysis, using model-selection techniques select wave based large systematically constructed pool allowed partial waves.The decomposition reveals signals mass region well-known states, such as 1 (1270)...

10.1142/9789811219313_0019 preprint EN Hadron Spectroscopy and Structure 2020-08-01

The main goal of the spectroscopy program at COMPASS is to explore light-meson spectrum below about $2\,\text{GeV}/c^2$ in diffractive production. Our flagship channel decay into three charged pions: $p + \pi^-\to \pi^-\pi^-\pi^+ p_\text{recoil}$, for which has acquired so far world's largest dataset roughly $50\,\text{M}$ exclusive events using an $190\,\text{GeV}/c$ $\pi^-$ beam. Based on this dataset, we performed extensive partial-wave analysis. In order extract resonance parameters...

10.22323/1.310.0032 preprint EN cc-by-nc-nd 2018-02-16

While the spectrum of non-strange light mesons is well known, many predicted strange have not yet been observed, and potentially observed states require further confirmation. Using $K^-$ component hadron beam at M2 beamline CERN, we study strange-meson with COMPASS experiment. The flagship channel $K^-\pi^-\pi^+$ final state, for which has obtained world's largest sample. Based on this sample, performed most detailed comprehensive partial-wave analysis state to date. For example, observe a...

10.48550/arxiv.2310.09249 preprint EN cc-by arXiv (Cornell University) 2023-01-01

The main goal of the spectroscopy program at COMPASS is to explore light-meson spectrum in mass range below about $2\,\text{GeV}/c^2$ using diffractive dissociation reactions. Our flagship channel production three charged pions reaction: $\pi^- + p \to \pi^-\pi^-\pi^+ p_\text{recoil}$, for which has acquired so far world's largest dataset roughly $50\,\text{M}$ exclusive events an $190\,\text{GeV}/c$ $\pi^-$ beam. Based on this dataset, we performed extensive partial-wave analysis. In order...

10.22323/1.336.0097 preprint EN cc-by-nc-nd Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018) 2019-09-12

The light-meson spectrum can be studied by analyzing data from diffractive dissociation of pion or kaon beams. contributions the various states that are produced in these reactions disentangled means partial-wave analysis. A challenge analyses is expansion has to truncated, i.e. only a finite subset infinitely many amplitudes inferred data. In recent years, different groups have applied regularization techniques order determine contributing waves However, obtain meaningful results choice...

10.48550/arxiv.1912.09849 preprint EN other-oa arXiv (Cornell University) 2019-01-01

Recent high-quality data sets from various experiments grant new insights into the excitation spectrum of light mesons, which are composed up, down, and strange quarks. In non-strange light-meson sector, many recent experimental theory efforts focused on search for so-called exotic states, states beyond na¨ıve constituent quark-model. To this end, potential decay modes studied at such as GlueX or COMPASS. addition, there is progress in understanding non-resonant processes, act background...

10.31349/suplrevmexfis.3.0308004 article EN cc-by-nc-nd Suplemento de la Revista Mexicana de Física 2022-05-19

COMPASS is a multi-purpose fixed-target experiment at CERN's M2 beam line aimed studying the structure and spectrum of hadrons. It has collected so far world's largest data set on diffractive production $K^-π^-π^+$ final state, which in principle gives access to all strange mesons. Based this set, we performed an elaborate partial-wave analysis. reveals signals mass region well-known states, such as $K_2^*(1430)$. In addition, found indications for resonance-like signal $K(1630)$. This state...

10.48550/arxiv.2211.09499 preprint EN other-oa arXiv (Cornell University) 2022-01-01

COMPASS is a multi-purpose fixed-target experiment at CERN’s M2 beam line aimed studying the structure and spectrum of hadrons. It has collected so far world’s largest data set on diffractive production K − π + final state, which in principle gives access to all strange mesons. Based this set, we performed an elaborate partial-wave analysis. reveals signals mass region well-known states, such as * 2 (1430). In addition, found indications for resonance-like signal (1630). This state would be...

10.1051/epjconf/202227403010 article EN cc-by EPJ Web of Conferences 2022-01-01
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