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The Standard-Model Extension [PDF]
EPJ Web of Conferences, 2023 Lorentz and CPT symmetry represent cornerstones of our present understanding of nature, but may be violated in various theoretical approaches to underlying physics.
Lehnert Ralf
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Beta-decay spectrum and Lorentz violation
Physics Letters B, 2022 Relativity theory and its underlying Lorentz and CPT invariance represent key principles of physics and therefore require continued experimental scrutiny across the broadest possible range of energy scales and physical systems. Possibilities for tests of
Ralf Lehnert
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Symmetries and symmetry breaking [PDF]
Nuclear Physics A, 2001 In understanding the world of matter, the introduction of symmetry principles following experimentation or using the predictive power of symmetry principles to guide experimentation is most profound. The conservation of energy, linear momentum, angular momentum, charge, and CPT involve fundamental symmetries.
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Astrophysical Neutrinos in Testing Lorentz Symmetry
Galaxies, 2021 An overview of searches related to neutrinos of astronomical and astrophysical origin performed within the framework of the Standard-Model Extension is provided.
Ágnes Roberts
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COMPASS: meson spectroscopy and low-energy meson dynamics [PDF]
EPJ Web of Conferences, 2019 Within the broad physics programme of the COMPASS collaboration at CERN SPS, soft reactions of high-energy hadron beams on different nuclear targets are investigated.
Friedrich Jan M.
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Sympathetic cooling schemes for separately trapped ions coupled via image currents
New Journal of Physics, 2022 Cooling of particles to mK-temperatures is essential for a variety of experiments with trapped charged particles. However, many species of interest lack suitable electronic transitions for direct laser cooling.
C Will +20 more
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Physical Review Letters, 2020 The low-lying spectra of atomic nuclei display diverse behaviors, for example rotational bands, which can be described phenomenologically by simple symmetry groups such as spatial SU(3). This leads to the idea of dynamical symmetry, where the Hamiltonian commutes with the Casimir operator(s) of a group, and is block-diagonal in subspaces defined by the
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Networked Analysis of a Teaching Unit for Primary School Symmetries in the Form of an E-Book
Mathematics, 2021 In mathematics education, technology offers many opportunities to enrich curricular contents. Plane symmetries is a topic often skipped by primary teachers.
Angel Gutiérrez +2 more
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On the Constitutive Modelling of Piezoelectric Quasicrystals
Crystals, 2023 Quasicrystals endowed with piezoelectric properties belong nowadays to novel piezoelectric materials. In this work, the basic framework of generalized piezoelectricity theory of quasicrystals is investigated by providing an improvement of the existing ...
Eleni Agiasofitou, Markus Lazar
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Constraining spacetime nonmetricity with neutron spin rotation in liquid 4He
Physics Letters B, 2017 General spacetime nonmetricity coupled to neutrons is studied. In this context, it is shown that certain nonmetricity components can generate a rotation of the neutron's spin. Available data on this effect obtained from slow-neutron propagation in liquid
Ralf Lehnert +3 more
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