Mirror matter can alleviate the cosmological lithium problem

Coc, A.; Uzan, Jean‐Philippe; Vangioni, Elisabeth

doi:10.1103/physrevd.87.123530

Cited by 29 publications

(44 citation statements)

References 112 publications

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“…1 It is of key importance that in nuclei n → n transition is forbidden by energy conservation and thus nuclear stability bounds give no limitations on τ , while for free neutrons n-n oscillation is affected by magnetic fields and coherent interactions with matter which makes this phenomenon rather elusive [15,16]. On the other hand, it is striking that n → n transitions faster than the neutron decay can have far going implications for the propagation of ultra-high energy cosmic rays at cosmological distances [19], for the neutrons from solar flares [20], for primordial nucleosynthesis [21] and for neutron stars [22]. 2 The possibility of fast n−n oscillations can be tested in experiments searching for neutron disappearance n → n and regeneration n → n → n [15] as well as via nonlinear effects on the neutron spin precession [16].…”

Section: Introductionmentioning

confidence: 99%

New experimental limits on neutron – mirror neutron oscillations in the presence of mirror magnetic field

et al. 2018

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Present probes do not exclude that the neutron (n) oscillation into mirror neutron (n ), a sterile state exactly degenerate in mass with the neutron, can be a very fast process, in fact faster than the neutron decay itself. This process is sensitive to the magnetic field. Namely, if the mirror magnetic field B exists at the Earth, n − n oscillation probability can be suppressed or resonantly amplified by the applied magnetic field B, depending on its strength and on the angle β between B and B . We present the results of ultra-cold neutron storage measurements aiming to check the anomalies observed in previous experiments which could be a signal for n − n oscillation in the presence of mirror magnetic field B ∼ 0.1 G. Analyzing the experimental data on neutron loses, we obtain a new lower limit on n − n oscillation time τ nn > 17 s (95 % C.L.) for any B between 0.08 and 0.17 G, and τ nn / √ cos β > 27 s (95 % C.L.) for any B in the interval (0.06 ÷ 0.25) G.arXiv:1712.05761v1 [hep-ex]

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Section: Introductionmentioning

confidence: 99%

New experimental limits on neutron – mirror neutron oscillations in the presence of mirror magnetic field

et al. 2018

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“…27 Modern determinations based on radar ranging led to 28 43.2 ± 0.9 " cy −1 . The latest determination, based on optical data, yields 29 cleosynthesis, 43,44 gravitational microlensing, 45,46 anisotropies 47 in the Cosmic Microwave Background (CMB), Baryon Acoustic Oscillation (BAO) clustering in sky surveys, 48 and structure formation 49,50 elucidated that galactic and extragalactic obscure mass cannot be made, to a large extent, of particles of ordinary matter. This is what is commonly meant today by the denomination 'Dark Matter'.…”

Section: Introductionmentioning

confidence: 99%

Gravitational anomalies in the solar system?

Iorio

2015

Int. J. Mod. Phys. D

100

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Mindful of the anomalous perihelion precession of Mercury discovered by U. Le Verrier in the second half of the nineteenth century and its successful explanation by A. Einstein with his General Theory of Relativity in the early years of the twentieth century, discrepancies among observed effects in our Solar system and their theoretical predictions on the basis of the currently accepted laws of gravitation applied to known matter-energy distributions have the potential of paving the way for remarkable advances in fundamental physics. This is particularly important now more than ever, given that most of the universe seems to be made of unknown substances dubbed Dark Matter and Dark Energy. Should this not be directly the case, Solar system's anomalies could anyhow lead to advancements in either cumulative science, as shown to us by the discovery of Neptune in the first half of the nineteenth century, and technology itself. Moreover, investigations in one of such directions can serendipitously enrich the other one as well. The current status of some alleged gravitational anomalies in the Solar system is critically reviewed. They are: a) Possible anomalous advances of planetary perihelia; b) Unexplained orbital residuals of a recently discovered moon of Uranus (Mab); c) The lingering unexplained secular increase of the eccentricity of the orbit of the Moon; d) The so-called Faint Young Sun Paradox; e) The secular decrease of the mass parameter of the Sun; f) The Flyby Anomaly; g) The Pioneer Anomaly; and h) The anomalous secular increase of the astronomical unit

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“…[49] and references therein). Other non-standard solutions to the lithium problem include photon cooling by axions [50] or extra neutrons from a mirror world [51].…”

Section: Non Standard Big-bang Nucleosynthesismentioning

confidence: 99%