Lorentz and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>C</mml:mi><mml:mi>P</mml:mi><mml:mi>T</mml:mi></mml:mrow></mml:math>tests with hydrogen, antihydrogen, and related systems

Kostelecký, V. Alan; Vargas, Arnaldo J.

doi:10.1103/physrevd.92.056002

Cited by 114 publications

(193 citation statements)

References 156 publications

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“…The greatest triumphs of modern physics (quantum theory and general relativity) are fundamentally incompatible; a quantum theory of gravity is desperately needed, and would presumably naturally answer all antigravity questions, but it has been impossible to create one. Whether such a theory would be generated from some sort of extension to the Standard Model [741][742][743][744] or from something else entirely (string theory?) is not known, which is why there is so much room for speculation.…”

Section: Antimatter Gravity Experimentsmentioning

confidence: 99%

Experimental progress in positronium laser physics

2018

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Abstract. The field of experimental positronium physics has advanced significantly in the last few decades, with new areas of research driven by the development of techniques for trapping and manipulating positrons using Surko-type buffer gas traps. Large numbers of positrons (typically ≥10 6 ) accumulated in such a device may be ejected all at once, so as to generate an intense pulse. Standard bunching techniques can produce pulses with ns (mm) temporal (spatial) beam profiles. These pulses can be converted into a dilute Ps gas in vacuum with densities on the order of 10 7 cm −3 which can be probed by standard ns pulsed laser systems. This allows for the efficient production of excited Ps states, including long-lived Rydberg states, which in turn facilitates numerous experimental programs, such as precision optical and microwave spectroscopy of Ps, the application of Stark deceleration methods to guide, decelerate and focus Rydberg Ps beams, and studies of the interactions of such beams with other atomic and molecular species. These methods are also applicable to antihydrogen production and spectroscopic studies of energy levels and resonances in positronium ions and molecules. A summary of recent progress in this area will be given, with the objective of providing an overview of the field as it currently exists, and a brief discussion of some future directions.

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Section: Antimatter Gravity Experimentsmentioning

confidence: 99%

Experimental progress in positronium laser physics

2018

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“…This statement is valid only for a given inertial frame, which is not the case of a laboratory on Earth. To put these results in an experimental context, one would calculate this four-pole tensor in the laboratory frame, taking into account the fact that the background vector rotates with respect to the laboratory frame as a function of time [8]. It would produce a rotation of the induced four-pole calculated above.…”

Section: Induced Electric Dipole and Four-pole And Magnetic Dipolementioning

confidence: 99%

“…[2]. To put these results in an experimental context, one would take into account the rotation of the background vector with respect to the laboratory frame [5,8]. The effects of this rotation shall not modify the order of magnitude of the results, which are completely out of reach for any spectroscopic experiment nowadays.…”

Section: Final Remarksmentioning

confidence: 99%

“…In this context we might address, for instance, the CPT and Lorentz symmetry breaking signs on the hydrogen and/or antihydrogen atoms due to modifications in Dirac equation [5][6][7][8][9][10][11][12][13][14], the SME effects induced in hydrogen molecules [15], the non-minimal coupling effects on the hydrogen spectrum [16], the hydrogen spectrum in models with Lorentz symmetry breaking for five-dimensional models [17], atomic physics in electromagnetic cavities [18] and maser physics [19], the influence of a Chern-Simons-type term on the hydrogen atom [20], and so on. a e-mail: luizhenriqueunifei@yahoo.com.br b e-mail: fbarone@unifei.edu.br Although we can find some literature considering the hydrogen-like systems in Lorentz symmetry breaking scenarios [21], there are some subjects not yet well explored for such kind of systems.…”

Section: Introductionmentioning

confidence: 99%

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Traces of Lorentz symmetry breaking in a hydrogen atom at ground state

Borges¹,

Barone²

2016

Eur. Phys. J. C

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Some traces of a specific Lorentz symmetry breaking scenario in the ground state of the hydrogen atom are investigated. We use standard Rayleigh-Schrödinger perturbation theory in order to obtain the corrections to the ground state energy and the wave function. It is shown that an induced four-pole moment arises, due to the Lorentz symmetry breaking. The model considered is the one studied in Borges et al. (Eur Phys J C 74:2937, 2014, where the Lorentz symmetry is broken in the electromagnetic sector.

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“…This bound state is also considered for observation of the gravitational quantum states [6]. All of these systems, among others, are used in the Standard Model Extension framework for Lorentz and CPT tests [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Studies of discrete symmetries in decays of positronium atoms

Czerwiński

Curceanu

Dulski

et al. 2018

EPJ Web of Conferences

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Abstract.A positronium -a bound state of electron and positron -is an eigenstate of parity and charge conjugation operators which decays into photons. It is a unique laboratory to study discrete symmetries whose precision is limited, in principle, by the effects due to the weak interactions expected at the level of 10 −14 and photon-photon interactions expected at the level of 10 −9 . The Jagiellonian Positron Emission Tomograph (J-PET) is a detector for medical imaging as well as for physics studies involving detection of electronpositron annihilation into photons. The physics case covers the areas of discrete symmetries studies and genuine multipartite entanglement. The J-PET detector has high angular and time resolution and allows for determination of spin of the positronium and the momenta and polarization vectors of annihilation quanta. In this article, we present the potential of the J-PET system for studies of discrete symmetries in decays of positronium atoms.

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Lorentz andCPTtests with hydrogen, antihydrogen, and related systems

Cited by 114 publications

References 156 publications

Experimental progress in positronium laser physics

Experimental progress in positronium laser physics

Traces of Lorentz symmetry breaking in a hydrogen atom at ground state

Studies of discrete symmetries in decays of positronium atoms

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