Self-interacting Elko dark matter with an axis of locality

Ahluwalia, Dharam Vir; Lee, Cheng-Yang; Schritt, D.

doi:10.1103/physrevd.83.065017

Cited by 85 publications

(134 citation statements)

References 38 publications

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“…Consequently we have (without the non-locality inducing extra term of all previous papers on the subject [1,2,37,38,41])…”

Section: Locality Structure Of the New Fieldmentioning

confidence: 99%

“…[36], and refined in Ref. [37,38]. It can now be more systematically understood by observing that those results correspond to the Ξ(p µ ) of the second example considered above (and given in equation (4.15)).…”

Section: The Dual For λ(P µ )mentioning

confidence: 99%

“…15] and [38,Eq. 22] establishes the equivalence of the dual introduced here and the one introduced in the previous works.…”

Section: The Dual For λ(P µ )mentioning

confidence: 99%

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The Theory of Local Mass Dimension One Fermions of Spin One Half

Ahluwalia

2017

Adv. Appl. Clifford Algebras

173

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Abstract. About a decade ago the present author in collaboration with Daniel Grumiller presented an 'unexpected theoretical discovery' of spin one-half fermions with mass dimension one [1,2]. In the decade that followed a significant number of groups explored intriguing mathematical and physical properties of the new construct. However, the formalism suffered from two troubling features, that of non-locality and a subtle violation of Lorentz symmetry. Here, we trace the origin of both of these issues to a hidden freedom in the definition of duals of spinors and the associated field adjoints. In the process, for the first time, we provide a quantum theory of spin one-half fermions that is free from all the mentioned issues. The interactions of the new fermions are restricted to dimension-four quartic self interaction, and also to a dimensionfour coupling with the Higgs. A generalised Yukawa coupling of the new fermions with neutrinos provides an hitherto unsuspected source of lepton-number violation. The new fermions thus present a first-principle dark matter partner to Dirac fermions of the standard model of high energy physics with contrasting mass dimensions -that of three halves for the latter versus one of the former without mutating the statistics from fermionic to bosonic.

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“…Consequently we have (without the non-locality inducing extra term of all previous papers on the subject [1,2,37,38,41])…”

Section: Locality Structure Of the New Fieldmentioning

confidence: 99%

Section: The Dual For λ(P µ )mentioning

confidence: 99%

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The Theory of Local Mass Dimension One Fermions of Spin One Half

Ahluwalia

2017

Adv. Appl. Clifford Algebras

173

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“…These theories have a preferred axis [8,10,11], that breaks Lorentz invariance by breaking rotational symmetry. Along such a preferred axis, the ELKO field enjoys locality [12]. It is intriguing that cosmological observations also show some evidence for a preferred axis in the Universe [13,14].…”

Section: Introductionmentioning

confidence: 99%

ELKO fermions as dark matter candidates

et al. 2015

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We study the implications of the ELKO fermions as a cold dark matter candidate. Such fermions arise in theories that are not symmetric under the full Lorentz group. Although they do not carry electric charge, ELKOs can still couple to photons through a nonstandard interaction. They also couple to the Higgs but do not couple to other standard model particles. We impose limits on their coupling strength and the ELKO mass assuming that these particles give dominant contribution to the cosmological cold dark matter. We also determine limits imposed by the direct dark matter search experiments on the ELKO-photon and the ELKO-Higgs coupling. Furthermore we determine the limit imposed by the gamma ray bursts time delay observations on the ELKO-Higgs coupling. We find that astrophysical and cosmological considerations rule out the possibility that ELKO may contribute significantly as a cold dark matter candidate. The only allowed scenario in which it can contribute significantly as a dark matter candidate is that it was never in equilibrium with the cosmic plasma. We also obtain a relationship between the ELKO self-coupling and its mass by demanding it to be consistent with observations of dense cores in the galactic centers.

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“…The very definition of ELKO and their dynamics are the basis for the explanation of some fundamental problems in cosmology and hence the reason for which ELKOs are so important for cosmology's standard model: the idea of a privileged direction arising from a preferred axis ( [5], [6]) could be explained by their spin structure ( [7], [8]); the curves of rotation of galaxies and the inflationary expansion of the universe ( [9], [10], [11]) could be described by their dynamics ( [12], [13], [14], [15], [16], [17]). Some of these results have been reviewed while others have been extended and a comprehensive list of the results is accounted in the literature ( [18], [19], [20], [21], [22], [23], [24], [25], [26]).…”

Section: Introductionmentioning

confidence: 99%

Zero energy of plane-waves for ELKOs

Fabbri

2011

Gen Relativ Gravit

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We consider the ELKO field in interaction through contorsion with its own spin density, and we investigate the form of the consequent autointeractions; to do so we take into account the high-density limit and find plane wave solutions: such plane waves give rise to contorsional autointeractions for which the Ricci metric curvature vanishes and therefore the energy density is equal to zero identically. Consequences are discussed.

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Self-interacting Elko dark matter with an axis of locality

Cited by 85 publications

References 38 publications

The Theory of Local Mass Dimension One Fermions of Spin One Half

The Theory of Local Mass Dimension One Fermions of Spin One Half

ELKO fermions as dark matter candidates

Zero energy of plane-waves for ELKOs

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