Fundamentals of Cosmological Particle Physics

Khlopov, Maxim Yu.

doi:10.1007/978-1-907343-72-8

Cited by 65 publications

(72 citation statements)

References 129 publications

(321 reference statements)

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“…DWs are formed during the phase transitions in the early universe once the discrete symmetry of the underlying gauge theory is spontaneously broken. After creation, their average number per a Hubble radius remains constant for some time, so, if they were stable, their energy density potentially could dominate and overclose the Universe [4][5][6][7]. To avoid this, DWs…”

Section: Introductionmentioning

confidence: 99%

Piercing of domain walls: new mechanism of gravitational radiation

Gal’tsov

Melkumova

Spirin

2018

J. High Energ. Phys.

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Domain wall (DW) moving in media undergoes the friction force due to particle scattering. However certain particles are not scattered, but perforate the wall. As a result, the wall gets excited in the form of the branon wave, while the particle experiences an acceleration jump. This gives rise to generation of gravitational waves which we call "piercing gravitational radiation" (PGR). Though this effect is of higher order in the gravitational constant than the quadrupole radiation from the collapsing DWs, its amplitude is enhanced in the case of relativistic particles or photons because of absence of the velocity factor which is present in the quadrupole formula. We derive the spectral-angular distribution of PGR within the simplified model of the weakly gravitating particle-wall system in Minkowski space-time of arbitrary dimensions. Within this model the radiation amplitude is obtained analytically. The spectral-angular distribution of PGR in such an approach suffers from infrared and ultraviolet divergences as well as from collinear divergence in the case of a massless perforating particle. Different cut-off schemes appropriate in various dimensions are discussed. Our results are applicable both to cosmological DWs and to the braneworld models. PGR can be relevant in the infrared part of the spectrum of the relic gravitons where radiation from the collapsed DWs is damped.

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Section: Introductionmentioning

confidence: 99%

Piercing of domain walls: new mechanism of gravitational radiation

Gal’tsov

Melkumova

Spirin

2018

J. High Energ. Phys.

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“…His approach to the Big Bang scenario was based on the application of the known physics (general relativity, thermodynamics, atomic, nuclear and particle physics) to the Unvierse as a whole [7]. However, the development of the results of his works has demonstrated the necessity in the new physics, underlying inflation, baryosynthesis and dark matter/energy as inevitable elements of the complete cosmological scenario (see, e.g., [5] for review). It put Zeldovich's works in the cornerstones of the foundation of cosmoparticle physics.…”

Section: Introductionmentioning

confidence: 99%

“…The Ouroboros puzzle may be formulated as follows: The theory of the Universe is based on the predictions of particle theory, that need cosmology for their test. Cosmoparticle physics [1][2][3][4][5][6] offers the way out of this wrong circle. It studies the fundamental basis and mutual relationship of micro-and macro-worlds in the proper combination of physical, astrophysical and cosmological signatures.…”

Section: Introductionmentioning

confidence: 99%

Cosmoparticle physics: The universe as a laboratory of elementary particles

Khlopov

2015

Astron. Rep.

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“…Specifically, rather strong constraints on the coupling constants of hadronic axions were found from astrophysics [20] (see Ref. [21] for various models of hadronic axions). In this context, one could mention the constraints imposed by the neutrino data of supernova SN 1987A [22], from stellar cooling [23,24], from direct Chandra observation of the surface temperature of isolated neutron stars [25], among others.…”

Section: Introductionmentioning

confidence: 99%

Constraining axion coupling constants from measuring the Casimir interaction between polarized test bodies

2016

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We propose an experiment for measuring the effective Casimir pressure between two parallel SiC plates with aligned nuclear spins. The prospective constraints on an axion-neutron coupling constant for both hadronic and GUT axions are calculated using the process of one-axion exchange.For this purpose, a general expression for the additional pressure arising between two polarized plates due to the exchange of one axion between their constituent fermions is derived. We demonstrate that only the polarization component perpendicular to the plates contribute to the pressure.The obtained pressure can be both repulsive and attractive depending on whether the polarizations of both plates are unidirectional or directed in opposite directions. It is shown that although the constraints on an axion-electron coupling obtained in the case of magnetized plates are not competitive, the constraints on an axion-neutron coupling found for plates with polarized nuclear spins are of the same order of magnitude of those obtained previously for the GUT axions alone using the process of two-axion exchange. The proposed experiment allows also to strengthen the presently known constraints on the axion-neutron coupling constants of GUT axions by using both processes of one-and two-axion exchange.

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Fundamentals of Cosmological Particle Physics

Cited by 65 publications

References 129 publications

Piercing of domain walls: new mechanism of gravitational radiation

Piercing of domain walls: new mechanism of gravitational radiation

Cosmoparticle physics: The universe as a laboratory of elementary particles

Constraining axion coupling constants from measuring the Casimir interaction between polarized test bodies

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