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Toward a pulsed antihydrogen beam for WEP tests in AEgIS
Published 2023-01-01“…AEg̅IS has recently undergone major upgrades to fully benefit from the increased number of colder antiprotons provided by the new ELENA decelerator and to move toward forming a horizontal beam to directly investigate the influence of gravity on the H̅ atoms, thereby probing the Weak Equivalence Principle for antimatter. This contribution gives an overview of these upgrades as well as subsequent results from the first beam times with ELENA.…”
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Fundamental physics from galaxies
Published 2022“…</p> <p>We consider modifications to the propagation of light by one of three effects: quantum gravity (QG), a non-zero photon mass and a violation of the Weak Equivalence Principle (WEP). We use spectral lag data of Gamma Ray Bursts from the BATSE satellite to constrain the photon mass to be $m_\gamma < 4.0 \times 10^{-5} \, h \, {\rm eV}/c^2$ and the QG length scale to be $\ell_{\rm QG} < 5.3 \times 10^{-18} \, h \, {\rm \, GeV^{-1}}$ at 95\% confidence, WEP to $\Delta \gamma < 2.1 \times 10^{-15}$ at $1 \sigma$ confidence between photon energies of $25 {\rm \, keV}$ and $325 {\rm \, keV}$, and we demonstrate that these constraints are robust to how one models other contributions to the signal.…”
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Pulsed Production of Antihydrogen in AEgIS
Published 2023-01-01“…Low-temperature antihydrogen atoms are an effective tool to probe the validity of the fundamental laws of Physics, for example the Weak Equivalence Principle (WEP) for antimatter, and -generally speaking- it is obvious that colder atoms will increase the level of precision. …”
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The space cold atom interferometer for testing the equivalence principle in the China Space Station
Published 2023-07-01“…Abstract The precision of the weak equivalence principle (WEP) test using atom interferometers (AIs) is expected to be extremely high in microgravity environment. …”
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