The most general ELKO matter in torsional f(R)‐theories

Fabbri, Luca; Vignolo, Stefano

doi:10.1002/andp.201100006

Cited by 33 publications

(5 citation statements)

References 35 publications

(60 reference statements)

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“…[10][11][12][13][14][15] For instance, possible applications of ELKO spinor fields to more general f (R) gravitational theories. 16 The formal aspects about the inequivalent spin structures in spacetime in terms of the different possible spin connections [17][18][19] have resulted prominent physical applications. We investigate dark spinor fields in spacetimes with non-trivial topologies, in order to clarify how the dynamics of such dark spinor fields can be used as a tool for probing the metric spacetime structure, related to a non-trivial topology itself.…”

Section: Introductionmentioning

confidence: 99%

Elko Spinor Fields as a Tool for Probing Exotic Topological Spacetime Features

Rocha

Silva

Bernardini

2011

Int. J. Mod. Phys. Conf. Ser.

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We report about some achievements and developments provided by the ELKO program, in particular the ones recently accomplished. 1 Exotic dark spinor fields has been investigated in the context of inequivalent spin structures on arbitrary curved spacetimes, which induces an additional term on the associated Dirac operator, related to aČech cohomology class. Exotic terms operating on standard model Dirac spinor fields are usually absorbed by gauge transformations encoded as a shift of some vector potential representing an element of the cohomology group H 1 (M, Z 2 ). That is not the case of ELKO, once they cannot carry gauge charge. As a consequence, the ELKO program requires a complete evaluation of topological analysis. Since exotic dark spinor fields also satisfy Klein-Gordon propagators, the dynamical constraints related to the exotic term in the Dirac equation can be explicitly computed. It forthwith implies that the non-trivial topology associated to the spacetime can drastically engender -from the dynamics of dark spinor fields -constraints on the spacetime metric structure. Besides being candidates to the dark matter problem, dark spinor fields are shown to be potential candidates to probe non-trivial topologies in spacetime, as well as to explain the spacetime metric structure.

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Section: Introductionmentioning

confidence: 99%

Elko Spinor Fields as a Tool for Probing Exotic Topological Spacetime Features

Rocha

Silva

Bernardini

2011

Int. J. Mod. Phys. Conf. Ser.

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“…Elko in the presence of torsion has been a subject of several insightful papers by Luca Fabbri. We refer the reader to these and related publications [93][94][95][96][97][98][99]. Cosmological solutions of 5D Einstein equations with Elko condensates were obtained by Tae Hoon Lee where it was found that there exist exponentially expanding cosmological solution even in the absence of a cosmological constant [100].…”

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confidence: 99%

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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“…Incursions into the world of fashion by artists continued with Street art, Graffitism, and Pop Art. Keith Haring painted fabrics, T-shirts, and watches for Vivienne Westwood, and his collaboration with Elio Fiorucci in Milan was instrumental in the opening of his emporium in San Babila (Fabbri F., Muzzarelli F. 2011).…”

Section: Fashion and Artmentioning

confidence: 99%

For a Contemporary Vision of the History and the Phenomenology of Fashion

Giurdanella

2024

JMPP

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This paper traces the salient phenomena that have marked the history of fashion and define it as it is now-adays. Foremost, an attempt is made to value the term “fashion” under different lights. From the 18th century onward, there was a succession of historical, political, social, and cultural changes that accelerated the phenomenon consolidation of fashion as a cultural phenomenon of great importance and dynamism, both in terms of its incursions into the languages of art and in terms of the international economy. A few focuses follow: on Lombard clothing, on how some items played different roles besides clothing, on the costume in the Goldoni’s theater, on the twentieth-century Decadentism of Oscar Wilde, and others. Other aspects that characterize the industry today follow: the intersection of fashion with all the other arts, the role of magazines in the process of women’s emancipation, the meaning of “fashion showcase”, luxury brands and the phenomenon of their counterfeiting, the role of the “prosumer”, and sustainable fashion laws, looking toward a future zero-carbon society.

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The most general ELKO matter in torsional f(R)‐theories

Abstract: We study f (R)-gravity with torsion in presence of the most general ELKO matter, checking the consistency of the conservation laws with the matter field equations; we discuss some mathematical features of the field equations in connection with a cosmological application.

Cited by 33 publications

References 35 publications

Elko Spinor Fields as a Tool for Probing Exotic Topological Spacetime Features

Elko Spinor Fields as a Tool for Probing Exotic Topological Spacetime Features

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

For a Contemporary Vision of the History and the Phenomenology of Fashion

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