Using a Penning trap to weigh antiprotons

Lagomarsino, V.; Lia, V.; Manuzio, G.; Testera, G.

doi:10.1103/physreva.50.977

Cited by 11 publications

(4 citation statements)

References 18 publications

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“…Measuring gravitational effects in this way is ambitious, as can be appreciated from the size of the quantity |m e g/e| ≃ 6 × 10 −12 V/m. Nonetheless, the feasibility of gravitational measurements with trapped antiprotons at a sensitivity of about 1% has been suggested, using a gravity-induced shift of radial orbits [98]. This would also lead to sensitivity to the coefficients (a w eff ) µ via an analysis similar to those discussed above.…”

Section: A Tests With Electrons and Ionsmentioning

confidence: 99%

Matter-gravity couplings and Lorentz violation

2011

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The gravitational couplings of matter are studied in the presence of Lorentz and CPT violation. At leading order in the coefficients for Lorentz violation, the relativistic quantum hamiltonian is derived from the gravitationally coupled minimal Standard-Model Extension. For spin-independent effects, the nonrelativistic quantum hamiltonian and the classical dynamics for test and source bodies are obtained. A systematic perturbative method is developed to treat small metric and coefficient fluctuations about a Lorentz-violating and Minkowski background. The post-newtonian metric and the trajectory of a test body freely falling under gravity in the presence of Lorentz violation are established. An illustrative example is presented for a bumblebee model. The general methodology is used to identify observable signals of Lorentz and CPT violation in a variety of gravitational experiments and observations, including gravimeter measurements, laboratory and satellite tests of the weak equivalence principle, antimatter studies, solar-system observations, and investigations of the gravitational properties of light. Numerous sensitivities to coefficients for Lorentz violation can be achieved in existing or near-future experiments at the level of parts in 10 3 down to parts in 10 15 . Certain coefficients are uniquely detectable in gravitational searches and remain unmeasured to date.

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Section: A Tests With Electrons and Ionsmentioning

confidence: 99%

Matter-gravity couplings and Lorentz violation

2011

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“…At the start of a measurement, several antiprotons are transferred from the storage to the cooling trap. The antiprotons are cooled [13] to a mean temperature of 0.1 µeV by adiabatically lowering the confining fields in the cooling trap. The antiprotons are then transferred to the weighing trap, dynamically switching on confining fields to effect capture.…”

Section: Description Of Apparatusmentioning

confidence: 99%

The WEAX experiment

Huber

Messerschmid

Smith

2001

Class. Quantum Grav.

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Einstein's weak equivalence principle (WEP) states that gravitational mass is identical to inertial mass. This hypothesis has withstood experimental tests to an impressive accuracy of one part in 1011. Various hypotheses based on theory and observations with matter suggest violations of WEP for antimatter may exist anywhere from the one part in 106 to the 200% level. An observed violation at any level would have a profound impact, e.g. it would offer an explanation as to why matter and antimatter are so distinctly separated in the cosmos. We propose a precise test of WEP for antiprotons in microgravity. We expect to test WEP for antimatter to about one part in 106, and foresee that additional advancements of several orders of magnitude in precision could follow with further technical developments.

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“…167 Another method proposes measuring the gravitational shift in the center of mass of antiprotons in a Penning trap. 168 …”

Section: Gravitymentioning

confidence: 99%

Antimatter plasmas and antihydrogen

1997

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Measurement of the groundstate hyperfine structure of antihydrogen AIP Conf.Recent successes in confining antimatter in the form of positron and antiproton plasmas have created new scientific and technological opportunities. Plasma techniques have been the cornerstone of experimental work in this area, and this is likely to be true for the foreseeable future. Work by a number of groups on trapping antimatter plasmas is summarized, and an overview of the promises and challenges in this field is presented. Topics relating to positron plasmas include the use of positrons to study the unique properties of electron-positron plasmas, the interaction between positrons and ordinary matter, and the laboratory modeling of positron-annihilation processes in interstellar media. The availability of cold, trapped antiprotons and positrons makes possible the production of neutral antimatter in the form of antihydrogen. This is expected to enable precise comparisons of the properties of matter and antimatter, including tests of fundamental symmetries and the measurement of the interaction of antimatter with gravity. © 1997 American Institute of Physics.

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Using a Penning trap to weigh antiprotons

Cited by 11 publications

References 18 publications

Matter-gravity couplings and Lorentz violation

Matter-gravity couplings and Lorentz violation

The WEAX experiment

Antimatter plasmas and antihydrogen

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