TL;DR
This paper investigates potential Lorentz and CPT symmetry violations in hydrogen and antihydrogen spectra using the Standard-Model Extension, revealing an unsuppressed effect in hyperfine transitions and discussing related experimental tests.
Contribution
It applies the Standard-Model Extension to antihydrogen spectroscopy, identifying possible Lorentz violation effects and exploring related tests in Penning traps and curved spacetime.
Findings
Potential Lorentz violation effects in hyperfine transitions.
Discussion of experimental tests in Penning traps.
Analysis of Lorentz violation in curved spacetime.
Abstract
Signals of CPT and Lorentz violation are possible in the context of spectroscopy using hydrogen and antihydrogen. We apply the Standard-Model Extension, a broad framework for Lorentz breaking in physics, to various transitions in the hydrogen and antihydrogen spectra. The results show an unsuppressed effect in the transition between the upper two hyperfine sublevels of the ground state of these systems. We also discuss related tests in Penning traps, and recent work on Lorentz violation in curved spacetime.
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