Searching extra dimensions in compact stars

Barnaföldi, G. G.; Lévai, P.; Lukács, B.

doi:10.1002/asna.200710806

Cited by 8 publications

(6 citation statements)

References 16 publications

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“…The above thermodynamical variables were derived for any states i, from the generalized thermodynamical potential, Ω(m i , µ i ) as presented in Refs. [6,7].…”

Section: Results For Compact Stars: Eos With Many-flavormentioning

confidence: 99%

“…Considering a compactified radius R c ∼ 10 −13 cm this 'extra mass' gap is ∼ 100 MeV, which is an available value in hadron spectroscopy by the TeV energy accelerators, such as the Large Hadron Collider [5] or even in superdense compact stars as in Ref. [6] and references therein. In this framework the extra compactified 5 th dimension represents the hypercharge or the similar quantum number (strangeness, charm, or bottomness) connected to even several number of flavors.…”

Section: Degrees Of Freedom In the Kaluza -Klein Theorymentioning

confidence: 99%

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Correspondence of Many-flavor Limit and Kaluza--Klein Degrees of Freedom in the Description of Compact Stars

Karsai¹,

Forgács‐Dajka²,

Barnaföldi³

et al. 2017

Acta Phys. Pol. B Proc. Suppl.

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We present the correspondence between non-interacting multi-hadron fermion star equation of state in the many-flavor limit and the degrees of freedom of a Kaluza -Klein compact star. Many flavors can be interpreted in this framework as one extra compactified spatial dimension with various, more-and-more massive hadron state excitations. The effect of increasing the degrees of freedom was investigated on the equation of state and in connection with the mass-radius relation, M (R). The maximum mass of the star, M max were also calculated as a function of the maximum number of excited states, n and the size of the compactified extra dimension, R c .

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“…The above thermodynamical variables were derived for any states i, from the generalized thermodynamical potential, Ω(m i , µ i ) as presented in Refs. [6,7].…”

Section: Results For Compact Stars: Eos With Many-flavormentioning

confidence: 99%

Section: Degrees Of Freedom In the Kaluza -Klein Theorymentioning

confidence: 99%

Correspondence of Many-flavor Limit and Kaluza--Klein Degrees of Freedom in the Description of Compact Stars

Karsai¹,

Forgács‐Dajka²,

Barnaföldi³

et al. 2017

Acta Phys. Pol. B Proc. Suppl.

Self Cite

View full text Add to dashboard Cite

show abstract

“…This fact has to be taken seriously into account especially in those contexts in which the strong gravity effects could matches the physics of the Planck scale [29]. On one side, attention is for example devoted to the microphysics of the LHC to search for a sign of the Planck scale length dimension [30,31,32,33], but many efforts are also given to the comprehension of the higher energy astrophysical phenomena linked to the life steps of stellar evolution and that could be a natural arena in which explore the effects of a multidimensional theory [34,35], especially for those cases in which the standard models of stellar structure and evolutions does not properly collide with observed data;…”

Section: Furthers Applicationsmentioning

confidence: 99%

Stars in five-dimensional Kaluza–Klein gravity

Pugliese

Montani

2011

Eur. Phys. J. C

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In the five dimensional Kaluza Klein (KK) theory there is a well known class of static and electromagnetic-free KK-equations characterized by a naked singularity behavior, namely the Generalized Schwarzschild solution (GSS). We present here a set of interior solutions of five dimensional KK-equations.These equations have been numerically integrated to match the GSS in the vacuum. The solutions are candidates to describe the possible interior perfect fluid source of the exterior GSS metric and thus they can be models for stars for static, neutral astrophysical objects in the ordinary (four dimensional) spacetime.

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“…Therefore geometrization of quantum fields, where charges are associated with compactified extra dimensions, are under investigations. Since, compactified extra dimension(s) or such topological issues have no direct observables in the classical physics cases, thus search for these can start at the known highest energy systems: (i) collisions of nuclei in high-energy particle accelerators or (ii) inside extreme-energetic celestial objects such as compact stars or black holes 3 .…”

Section: Introductionmentioning

confidence: 99%

Testing a possible way of geometrization of the strong interaction by a Kaluza–Klein star

Karsai

Pósfay

Barnaföldi

et al. 2016

Int. J. Mod. Phys. A

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Geometrization of the fundamental interactions has been extensively studied during the century. The idea of introducing compactified spatial dimensions originated by Kaluza and Klein. Following their approach, several model were built representing quantum numbers (e.g. charges) as compactified space-time dimensions. Such geometrized theoretical descriptions of the fundamental interactions might lead us to get closer to the unification of the principle theories. Here, we apply a 3 + 1 C + 1 dimensional theory, which contains one extra compactified spatial dimension 1 C in connection with the flavour quantum number in Quantum Chromodynamics. Within our model the size of the 1 C dimension is proportional to the inverse mass-difference of the first low-mass baryon states. We used this phenomena to apply in a compact star model -a natural laboratory for testing the theory of strong interaction and the gravitational theory in parallel. Our aim is to test the modification of the measurable macroscopical parameters of a compact Kaluza -Klein star by varying the size of the compactified extra dimension. Since larger the R C the smaller the mass difference between the first spokes of the Kaluza -Klein ladder resulting smaller-mass stars. Using the Tolman -Oppenheimer -Volkov equation, we investigate the M -R diagram and the dependence of the maximum mass of compact stars. Besides testing the validity of our model we compare our results to the existing observational data of pulsar properties for constraints.

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Searching extra dimensions in compact stars

Cited by 8 publications

References 16 publications

Correspondence of Many-flavor Limit and Kaluza--Klein Degrees of Freedom in the Description of Compact Stars

Correspondence of Many-flavor Limit and Kaluza--Klein Degrees of Freedom in the Description of Compact Stars

Stars in five-dimensional Kaluza–Klein gravity

Testing a possible way of geometrization of the strong interaction by a Kaluza–Klein star

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