![]() the Antihydrogen Laser PHysics Apparatus (ALPHA) experiment, started from 2008. At energies up to a few tens of eV, I focus on simple approximations that give reasonably accurate results, as these allow quick estimates of collision rates without embarking on a research project.This article is part of the Theo Murphy meeting issue 'Antiproton physics in the ELENA era'. We argue that initial spectroscopy measurements, once antihydrogen is trapped, could provide competitive tests of CPT, possibly probing physics at the Planck Scale. Keywords: cold antimatter, antiproton, antihydrogen, CPT symmetry. We discuss this reasoning in more detail, comment on the connection between CPT and Lorentz invariance, and review how CPT breaking would affect the (anti)hydrogen spectrum. 9 presents simulation results for Lyman- laser cooling, showing that. The ALPHA Collaboration used an approach called laser spectroscopy, which involved injecting pulses. Instead I compare the results from different theoretical calculations, of various degrees of sophistication. Since CPT symmetry can be measured with ultrahigh precision, CPT tests offer an interesting phenomenological avenue to search for underlying physics. 1S-2S spectroscopy on antihydrogen, an important test of CPT symmetry. A tiny violation of CPT symmetry during the Big Bang could, in principle, be. At low energies (1 keV) there are practically no experimental data available. Full PDF Package Download Full PDF Package. Antihydrogen spectroscopy is of primary interest for precision tests of CPT invariance - one of the most important symmetries of the Standard Model. N2 - I give an overview of experimental and theoretical results for antiproton and antihydrogen scattering with atoms and molecules (in particular H, He). ALPHA is an experiment at CERN, whose ultimate goal is to perform a precise test of CPT symmetry with trapped antihydrogen atoms. Particle physics aspects of antihydrogen studies with ALPHA at CERN. These experiments are performed with the ALPHA appa-ratus, where ultra-low energy antihydrogen is produced and con ned in a mag-netic trap. ALPHA, Antihydrogen accumulation for fundamental symmetry tests, Nat. Series A, Mathematical, physical, and engineering sciences T1 - Collisions involving antiprotons and antihydrogen: an overview. The Antihydrogen Laser Physics Apparatus (ALPHA), also known as AD-5, is an experiment at the Antiproton Decelerator at CERN, designed to trap neutral antihydrogen in a magnetic trap, and conduct experiments on them.
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