Electromagnetic fields and potentials generated by massless charged particles

Azzurli, Francesco; Lechner, Kurt

doi:10.1016/j.aop.2014.06.005

Cited by 18 publications

(21 citation statements)

References 10 publications

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“…This prompted us to revisit derivation of the spectral-angular distribution of radiated energy not referring to wave zone. Second, the effective radiating current contains a light-like part (due to the free branon) with associated problems in constructing the retarded solutions of the D'Alembert equation with light-like sources [38][39][40]. Furthermore, radiation exhibits peculiar infrared and collinear [41][42][43][44] divergences, typical for radiation from massless charges in gauge theories (for more detailed discussion see [45]).…”

Section: Jhep01(2018)120mentioning

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: Jhep01(2018)120mentioning

confidence: 99%

Piercing of domain walls: new mechanism of gravitational radiation

Gal’tsov

Melkumova

Spirin

2018

J. High Energ. Phys.

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“…one gets 19) where ✷ D−1 ≡ ∂ µ ∂ µ and Π MN is the projector onto the (one-dimensional) subspace orthogonal to V D−1 . The source term in Eq.…”

Section: The Setupmentioning

confidence: 99%

“…The novel feature of this radiation problem is the presence of the light-like source due to the branon as a part of the total source. Recently, the retarded solutions of the d'Alembert equation with light-like sources were extensively discussed in connection with the radiation problem [18,19], the memory effect [20][21][22][23][24] and the Bondi-Metzner-Sachs asymptotic symmetries [25]. Our radiation problem provides a novel interesting setting for these studies.…”

Section: Introductionmentioning

confidence: 99%

Branestrahlung: Radiation in the particle-brane collision

2016

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We calculate the radiation accompanying the gravitational collision of a domain wall a the point particle in five-dimensional spacetime. This process -which can be regarded as brane-particle bremsstrahlung, here called branestrahlung -has unusual features. Since the brane has intrinsic dynamics, it gets excited in the course of collision, and, in particular, at the moment of perforation the shock branon wave is generated, which then expands with the velocity of light. Therefore, apart from the time-like source whose radiation can be computed in a standard way, the total radiation source contains a light-like part whose retarded field is quite nontrivial, exhibiting interesting retardation and memory effects. We analyze this field in detail, showing that -contrary to the claims that the light-like sources should not radiate at all -the radiation is nonzero and has classically divergent spectrum. We estimate the total radiation power introducing appropriate cutoffs. In passing, we explain how the sum of the nonlocal (with the support inside the light cone) and the local (supported on the cone) singular parts of the Green's function of the five-dimensional d'Alembert equation together defines a regular functional.

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“…It is such mathematical errors that led to the appearance of singularities in the unified theory, and the suggestion of the existence of black holes in the universe. When 4 x is carefully retained in the space-time structure, black holes do not appear in the theory (see Wheeler's early work [25] and a recent paper on the classical solutions of Maxwell equations [26]). In fact, the mathematical/logical exclusion of the gravitation singularity based on simple classical physics can be realized by the following analysis.…”

Section: Absence Of Gravitational Singularitymentioning

confidence: 99%

“…In general, massless charged spinors cannot be bounded in 4D Maxwell space-time. The solutions found in [26] by attaching a string, is precisely found by addition of the 4th space dimension (making the system a 5D manifold), so that a finite confinement can occur in the (added) 4th space di- hypothesize that one system of the charge pairs is the origin of the angular momentum of the universe [2], and another system of charged pairs is proposed in this paper to be the origin of the magnetic field in stellar, perhaps also in other objects. We would endorse particular credit to that paper for laying stone for researchers to stand on and think deeply about the inclusion of charge massless entities traveling with c in Maxwell's equations.…”

Section: Explicit Expression Of Thementioning

confidence: 99%

Origin of Magnetic Fields of Stellar Objects in the Universe Based on the 5D Projection Theory

Fung¹,

Wong²

2017

JMP

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Beginning with a 5D homogeneous universe [1], we have provided a plausible explanation of the self-rotation phenomenon of stellar objects previously with illustration of large number of star samples [2], via a 5D-4D projection. The origin of such rotation is the balance of the angular momenta of stars and that of positive and negative charged e-trino pairs, within a 3 1 ⊗ D D void of the stellar object, the existence of which is based on conservation/parity laws in physics if one starts with homogeneous 5D universe. While the in-phase e-trino pairs are proposed to be responsible for the generation of angular momentum, the anti-phase but oppositely charge pairs necessarily produce currents. In the 5D to 4D projection, one space variable in the 5D manifold was compacted to zero in most other 5D theories (including theories of [4]). We have demonstrated, using the Fermat's Last Theorem [5], that for validity of gauge invariance at the 4D-5D boundary, the 4 th space variable in the 5D manifold is mapped into two current rings at both magnetic poles as required by Perelman entropy mapping; these loops are the origin of the dipolar magnetic field. One conclusion we draw is that there is no gravitational singularity, and hence no black holes in the universe, a result strongly supported by the recent discovery of many stars with masses well greater than 100 solar mass [6] [7] [8], without trace of phenomena observed (such as strong gamma and X ray emissions), which are supposed to be associated with black holes. We analyze the properties of such loop currents on the 4D-5D boundary, where Maxwell equations are valid. We derive explicit expressions for the dipolar fields over the whole temperature range. We then compare our prediction with measured surface magnetic fields of many stars.Since there is coupling in distribution between the in-phase and anti-phase pairs of e-trinos, the generated magnetic field is directly related to the angular momentum, leading to the result that the magnetic field can be expressible in terms of only the mechanical variables (mass M, radius R, rotation period P)of a star, as if Maxwell equations are "hidden". An explanation for the occurrence of this "un-expected result" is provided in Section (7.6). Therefore we provide satisfactory answers to a number of "mysteries" of magnetism in astrophysics such as the "Magnetic Bode's Relation/Law" [9] and the experimental finding that B-P graph in the log-log plot is linear. Moreover, we have developed a new method for studying the relations among the data (M, R, P) during stellar evolution. Ten groups of stellar objects, effectively over 2000 samples are used in various parts of the analysis. We also explain the emergence of huge magnetic field in very old stars like White Dwarfs in terms of formation of 2D Semion state on stellar surface and release of magnetic flux as magnetic storms upon changing the 2D state back to 3D structure. Moreover, we provide an explanation, on the ground of the 5D theory, for the detection of extremely weak fi...

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Electromagnetic fields and potentials generated by massless charged particles

Cited by 18 publications

References 10 publications

Piercing of domain walls: new mechanism of gravitational radiation

Piercing of domain walls: new mechanism of gravitational radiation

Branestrahlung: Radiation in the particle-brane collision

Origin of Magnetic Fields of Stellar Objects in the Universe Based on the 5D Projection Theory

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