On "Dark energy from antimatter by Walter R. Lamb.".

Noyes, H. Pierre

doi:10.4006/1.2993537

Cited by 7 publications

(7 citation statements)

References 9 publications

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“…Many theoretical arguments suggest that CPT operator can affect internal quantum numbers, but presumably leaves unaffected the gravity sector. The aspects of matter and antimatter gravitational interaction is widely debated [1427][1428][1429], indeed depending on the interpretation antimatter even if self-attractive can interact with ordinary matter attractively or repulsively. Following an argument present in [1430] the geodesic equations of motion are:…”

Section: Cpt Symmetry Implications In the Gravitational Sectormentioning

confidence: 99%

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Addazi,

Alvarez-Muniz,

Batista

et al. 2021

Preprint

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The exploration of the universe has recently entered a new era thanks to the multi-messenger paradigm, characterized by a continuous increase in the quantity and quality of experimental data that is obtained by the detection of the various cosmic messengers (photons, neutrinos, cosmic rays and gravitational waves) from numerous origins. They give us information about their sources in the universe and the properties of the intergalactic medium. Moreover, multi-messenger astronomy opens up the possibility to search for phenomenological signatures of quantum gravity. On the one hand, the most energetic events allow us to test our physical theories at energy regimes which are not directly accessible in accelerators; on the other hand, tiny effects in the propagation of very high energy particles could be amplified by cosmological distances. After decades of merely theoretical investigations, the possibility of obtaining phenomenological indications of Planck-scale effects is a revolutionary step in the quest for a quantum theory of gravity, but it requires cooperation between different communities of physicists (both theoretical and experimental). This review, prepared within the COST Action CA18108 "Quantum gravity phenomenology in the multi-messenger approach", is aimed at promoting this cooperation by giving a state-of-the art account of the interdisciplinary expertise that is needed in the effective search of quantum gravity footprints in the production, propagation and detection of cosmic messengers.

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Section: Cpt Symmetry Implications In the Gravitational Sectormentioning

confidence: 99%

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Addazi,

Alvarez-Muniz,

Batista

et al. 2021

Preprint

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“…In some proposed interpretations of antimatter gravity, the gravitational mass of antimatter is supposed with negative charge, meaning antimatter is self attractive but interacts repulsively with ordinary matter [35,36]. Instead other authors have argued that antimatter can be self repulsive [37,38]. The issue arises from the interpretation of the charge present in the formulation of General Relativity (GR) equations of motion.…”

Section: Cpt and Gravitymentioning

confidence: 99%

Phenomenological Effects of CPT and Lorentz Invariance Violation in Particle and Astroparticle Physics

2020

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It is well known that a fundamental theorem of Quantum Field Theory (QFT) set in flat spacetime ensures the CPT invariance of the theory. This symmetry is strictly connected to the Lorentz covariance, and consequently to the fundamental structure of spacetime. Therefore it may be interesting to investigate the possibility of departure from this fundamental symmetry, since it can furnish a window to observe possible effects of a more fundamental quantum gravity theory in a “lower energy limit”. Moreover, in the past, the inquiry of symmetry violations provided a starting point for new physics discoveries. A useful physical framework for this kind of search is provided by astroparticle physics, thanks to the high energy involved and to the long path travelled by particles accelerated by an astrophysical object and then revealed on Earth. Astrophysical messengers are therefore very important probes for investigating this sector, involving high energy photons, charged particles, and neutrinos of cosmic origin. In addition, one can also study artificial neutrino beams, investigated at accelerator experiments. Here we discuss the state of art for all these topics and some interesting new proposals, both from a theoretical and phenomenological point of view.

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“…The other hypothesis (Noyes, 2008;Benoit-Levy and Chardin, 2009;Gilson, 2009) may be summarized as: a particle attracts both particles and antiparticles, while an antiparticle repels both particles and antiparticles. Of course, contrary to my hypotheses it is an evident violation of CPT symmetry (what can't be excluded as possibility).…”

mentioning

confidence: 99%

“…In order to avoid misunderstandings, let me underline that my conjecture concerning the gravitational proprieties of antimatter presents just one of two complementary and mutually excluding hypotheses. The other hypothesis (Noyes, 2008;Benoit-Levy and Chardin, 2009;Gilson, 2009) may be summarized as: a particle attracts both particles and antiparticles, while an antiparticle repels both particles and antiparticles. Of course, contrary to my hypotheses it is an evident violation of CPT symmetry (what can't be excluded as possibility).…”

mentioning

confidence: 99%

Do we live in the universe successively dominated by matter and antimatter?

Hajdukovic

2011

Astrophys Space Sci

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We wonder if a cyclic universe may be dominated alternatively by matter and antimatter. Such a scenario demands a mechanism for transformation of matter to antimatter (or antimatter to matter) during the final stage of a big crunch. By giving an example, we have shown that in principle such a mechanism is possible. Our mechanism is based on a hypothetical repulsion between matter and antimatter, existing at least deep inside the horizon of a black hole. When universe is reduced to a supermassive black hole of a small size, a very strong field of the conjectured force might create (through a Schwinger type mechanism) particle-antiparticle pairs from the quantum vacuum. The amount of antimatter created from the vacuum is equal to the decrease of mass of the black hole and violently repelled from it. When the size of the black hole is sufficiently small, the creation of antimatter may become so fast, that matter of our Universe might be transformed to antimatter in a fraction of second. Such a fast conversion of matter into antimatter may look as a Big Bang. Our mechanism prevents a singularity; a new cycle might start with an initial size more than 30 orders of magnitude greater than the Planck length, suggesting that there is no need for inflationary scenario in Cosmology. In addition, there is no need to invoke CP violation for explanation of matter-antimatter asymmetry. Simply, our present day Universe is dominated by matter, because the previous universe was dominated by antimatter.

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On "Dark energy from antimatter by Walter R. Lamb.".

Cited by 7 publications

References 9 publications

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Phenomenological Effects of CPT and Lorentz Invariance Violation in Particle and Astroparticle Physics

Do we live in the universe successively dominated by matter and antimatter?

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