An atomic hydrogen beam to test ASACUSA’s apparatus for antihydrogen spectroscopy

Diermaier, M.; Caradonna, Peter; Kolbinger, B.; Malbrunot, C.; Massiczek, O.; Sauerzopf, C.; Simon, M. C.; Wolf, Michael M.; Zmeskal, J.; Widmann, E.

doi:10.1007/s10751-015-1151-y

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…Recently, the Antihydrogen Laser Physics Apparatus (ALPHA) collaboration has measured the antihydrogen groundstate hyperfine transitions [112] and the 1S-2S transition [113], heralding an era of precision antimatter spectroscopy. Other collaborations pursuing this goal include the Atomic Spectroscopy and Collisions Using Slow Antiprotons (ASACUSA) collaboration [114,115], and the Antihydrogen Trap (ATRAP) collaboration [116]. Experiments investigating the gravitational response of antihydrogen are also being developed, including the An-tihydrogen Experiment: Gravity, Interferometry, Spectroscopy (AEGIS) collaboration [117], the ALPHA collaboration [118], and the Gravitational Behavior of Antihydrogen at Rest (GBAR) collaboration [119], and the corresponding techniques may also enhance future spectroscopic studies of antihydrogen.…”

Section: Antimatter Clocksmentioning

confidence: 99%

Lorentz and CPT tests with clock-comparison experiments

Kostelecký

Vargas

2018

Phys. Rev. D

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Clock-comparison experiments are among the sharpest existing tests of Lorentz symmetry in matter. We characterize signals in these experiments arising from modifications to electron or nucleon propagators and involving Lorentz-and CPT-violating operators of arbitrary mass dimension. The spectral frequencies of the atoms or ions used as clocks exhibit perturbative shifts that can depend on the constituent-particle properties and can display sidereal and annual variations in time. Adopting an independent-particle model for the electronic structure and the Schmidt model for the nucleus, we determine observables for a variety of clock-comparison experiments involving fountain clocks, comagnetometers, ion traps, lattice clocks, entangled states, and antimatter. The treatment demonstrates the complementarity of sensitivities to Lorentz and CPT violation among these different experimental techniques. It also permits the interpretation of some prior results in terms of bounds on nonminimal coefficients for Lorentz violation, including first constraints on nonminimal coefficients in the neutron sector. Estimates of attainable sensitivities in future analyses are provided. Two technical appendices collect relationships between spherical and cartesian coefficients for Lorentz violation and provide explicit transformations converting cartesian coefficients in a laboratory frame to the canonical Sun-centered frame.

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Section: Antimatter Clocksmentioning

confidence: 99%

Lorentz and CPT tests with clock-comparison experiments

Kostelecký

Vargas

2018

Phys. Rev. D

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“…1 In order to verify the obtainable resolution of this setup, a source of cold and polarized hydrogen atoms was built at the Stefan Meyer Institute and combined with a Q-mass spectrometer to measure the GS-HFS of hydrogen. 4…”

Section: Introductionmentioning

confidence: 99%

Prospects of In-Flight Hyperfine Spectroscopy of (Anti)Hydrogen for Tests of CPT Symmetry

Widmann

2017

CPT and Lorentz Symmetry

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On behalf of the ASACUSA-CUSP CollaborationThe ground-state hyperfine splitting of antihydrogen promises one of the most sensitive tests of CPT symmetry. The ASACUSA collaboration is pursuing a measurement of this splitting in a Rabi-type experiment using a polarized beam from a CUSP magnet at the Antiproton Decelerator of CERN. With the initial intention of characterizing the Rabi apparatus, a polarized source of cold hydrogen was built and the σ 1 transition of hydrogen was measured to a few ppb precision. A measurement of the π 1 transition is being prepared. The availability of this beam opens the possibility to perform first measurements of some coefficients within the nonminimal Standard-Model Extension.

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