Gravitational hedgehog, stringy hedgehog and stringy sphere

Delice, Özgür

doi:10.1088/1126-6708/2003/11/058

Cited by 9 publications

(6 citation statements)

References 33 publications

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“…[42], we obtain an approximate solution for monopole-hedgehog taking w = 1 out the core of the hedgehog (see also Refs. [57][58][59][60][61]). In this case scalar curvature R is constant and Eq.…”

Section: The Metric Around Of the Global Monopolementioning

confidence: 99%

Black Holes-Hedgehogs and Strings as Defects of the Universal Vacua

Sidharth¹,

Das²,

Лаперашвили³

et al. 2017

Preprint

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In the present paper, assuming the Multiple Point Principle (MPP) as a new law of Nature, we considered the existence of the two degenerate vacua of the Universe: a) the first Electroweak (EW) vacuum at v 1 ≈ 246 GeV -"true vacuum", and b) the second Planck scale "false vacuum" at v 2 ∼ 10 18 GeV. In these vacua we investigated different topological defects. The main aim of this paper is an investigation of the black-hole-hedgehogs configurations as defects of the false vacuum. In the framework of the f (R) gravity, described by the Gravi-Weak unification model, we considered a black-hole solution, which corresponds to a "hedgehog" -global monopole, that has been "swallowed" by the black-hole with mass core M BH ∼ 10 18 GeV and radius δ ∼ 10 −21 GeV −1 . Considering the results of the hedgehog lattice theory in the framework of the SU (2) Yang-Mills gauge-invariant theory with hedgehogs in the Wilson loops, we have used the critical value of temperature for the hedgehogs confinement phase (T c ∼ 10 18 GeV). This result gave us the possibility to conclude that the SM shows a new physics (with contributions of the SU (2)-triplet Higgs bosons) at the scale ∼ 10 TeV. Theory predicts the stability of the EW-vacuum and the accuracy of the MPP.

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Section: The Metric Around Of the Global Monopolementioning

confidence: 99%

Black Holes-Hedgehogs and Strings as Defects of the Universal Vacua

Sidharth¹,

Das²,

Лаперашвили³

et al. 2017

Preprint

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show abstract

“…Hence the area of a sphere of proper radius r is not 4πr 2 , but rather (1 − 8πη 2 ) 4πr 2 . Note that the space-time ( 9) also describes a "cloud of strings" solution [80], namely, a configuration where an ensemble of radially distributed straight cosmic strings, i.e., a Letellier spacetime, intersecting at a common point, which sometimes also called the "string hedgehog configuration [78,81]". Note also that for positive values of (1−8πη 2 ), i.e.…”

Section: The Line Elementmentioning

confidence: 99%

Superradiance of a global monopole in Reissner–Nordström(–AdS) space-time

Seçuk

Delice

2020

Eur. Phys. J. C

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In this article, the behavior of a charged and massive scalar field around a global monopole swallowed by a Reissner–Nordström–Anti-de Sitter (RN–AdS) black hole is investigated by considering the Klein–Gordon equation in this geometry. The superradiance phenomenon and instability behavior of the black hole against charged scalar perturbations are studied for both an RN–AdS case and also for an RN black hole surrounded by a reflective mirror, i.e., the black hole bomb case. The effects of the monopole on these cases are discussed analytically and also with the help of several graphs in detail. The monopole charge affects the superradiance threshold frequency and also effects the instability time scale for both cases. The existence of global monopole makes these black holes more stable against superradiance instability.

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“…Refs. [58][59][60][61][62]). In this case scalar curvature R is constant and Equation (19) comes down to the Einstein's equation:…”

Section: The Metric Around Of the Global Monopolementioning

confidence: 99%

Explaining Defects of the Universal Vacua with Black Holes-Hedgehogs and Strings

Das

Лаперашвили

Nielsen³

et al. 2019

Universe

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Assuming the Multiple Point Principle (MPP) as a new law of Nature, we considered the existence of the two degenerate vacua of the Universe: (a) the first Electroweak (EW) vacuum at v 1 ≈ 246 GeV—“true vacuum”, and (b) the second Planck scale “false vacuum” at v 2 ∼ 10 18 GeV. In these vacua, we investigated different topological defects. The main aim of the paper is an investigation of the black-hole-hedgehogs configurations as defects of the false vacuum. In the framework of the f ( R ) gravity, described by the Gravi-Weak unification model, we considered a black-hole solution, which corresponds to a “hedgehog”—global monopole, that has been “swallowed” by the black-hole with mass core M B H ∼ 10 18 GeV and radius δ ∼ 10 − 21 GeV − 1 . Considering the results of the hedgehog lattice theory in the framework of the S U ( 2 ) Yang-Mills gauge-invariant theory with hedgehogs in the Wilson loops, we have used the critical value of temperature for the hedgehogs’ confinement phase ( T c ∼ 10 18 GeV). This result gave us the possibility to conclude that the SM shows a new physics (with contributions of the S U ( 2 ) -triplet Higgs bosons) at the scale ∼10 TeV. This theory predicts the stability of the EW-vacuum and the accuracy of the MPP.

show abstract

Gravitational hedgehog, stringy hedgehog and stringy sphere

Cited by 9 publications

References 33 publications

Black Holes-Hedgehogs and Strings as Defects of the Universal Vacua

Black Holes-Hedgehogs and Strings as Defects of the Universal Vacua

Superradiance of a global monopole in Reissner–Nordström(–AdS) space-time

Explaining Defects of the Universal Vacua with Black Holes-Hedgehogs and Strings

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