Zobrazeno 1 - 10
of 5 739
pro vyhledávání: '"Silva, Marcos A. A."'
Autor:
Crispim, T. M., Silva, Marcos V. de S., Alencar, G., Muniz, Celio R., Gómez, Diego Sáez-Chillón
In this work, we studied the characteristics of wormholes with multiple throats/anti-throats in the context of general relativity. The presence of these structures is verified through the minima and maxima in the area of these wormholes. Using embedd
Externí odkaz:
http://arxiv.org/abs/2412.05236
In this work, we investigate the existence of wormholes within the framework of Loop Quantum Cosmology, using isotropic dark matter as the source. We analyze three distinct density profiles and solve the modified gravity field equations alongside the
Externí odkaz:
http://arxiv.org/abs/2411.12063
In the framework of Simpson-Visser, the search for field sources that produce black bounces in alternative gravity theories has remained unresolved. In this paper, the first in a series exploring sources for alternative theories of gravity, we identi
Externí odkaz:
http://arxiv.org/abs/2409.12101
Autor:
Pereira, Carlos F. S., Rodrigues, Denis C., Silva, Marcos V. de S., Fabris, Júlio C., Rodrigues, Manuel E., Belich, H.
In the present work, we obtain and analyze a new class of analytical solutions of magnetically charged black bounces in k-essence theory, spherically symmetric in (3+1)-dimensions, coupled to nonlinear electrodynamics (NED). We consider two metric mo
Externí odkaz:
http://arxiv.org/abs/2409.09182
When extending the SM, e.g. with vector-like quarks (VLQ), one inevitably encounters more than one CP violating complex phases. In this work, we develop a method useful in reducing the number of complex phases in scenarios with one and two VLQs. We s
Externí odkaz:
http://arxiv.org/abs/2407.07158
Publikováno v:
International Journal of Theoretical Physics (2024) 63:101
In this work, the trajectories of particles around a black bounce spacetime are considered, with the Simpson-Visser model serving as an example. Trajectories for massless and massive particles are obtained through the study of null and time-like geod
Externí odkaz:
http://arxiv.org/abs/2404.15792
Autor:
Alencar, G., Bronnikov, Kirill A., Rodrigues, Manuel E., Gómez, Diego Sáez-Chillón, Silva, Marcos V. de S.
Publikováno v:
Eur. Phys. J. C (2024) 84:745
One of the main issues in gravitation is the presence of singularities in the most common space-time solutions of General Relativity, as the case of black holes. A way of constructing regular solutions that remove spacelike singularities consists in
Externí odkaz:
http://arxiv.org/abs/2403.12897
Publikováno v:
JCAP05(2024)012
In Atazadeh and Hadi (JCAP \textbf{01}, 067 (2024)), the authors proposed that black bounce solutions, such as the Simpson-Visser and the Bardeen-type spacetimes, can be obtained from Rastall gravity. To achieve these spacetimes, the authors consider
Externí odkaz:
http://arxiv.org/abs/2402.17814
Publikováno v:
Phys. Rev. D 108, 024065 (2023)
We apply the Simpson-Visser phenomenological regularization method to a cylindrically symmetric solution of the Einstein-Maxwell equations known as an inverted black hole. In addition to analyzing some properties of thus regularized space-time, inclu
Externí odkaz:
http://arxiv.org/abs/2305.19296
Autor:
Nishi, C. C., Silva-Marcos, J. I.
Publikováno v:
Phys. Rev. D 108, 095031, 2023
The seesaw extension of the SM explains the tiny neutrino masses and it is accompanied by many CP violating phases. We study the case where all leptonic CP violation arises from the soft breaking in the heavy Majorana mass matrix. Parameter counting
Externí odkaz:
http://arxiv.org/abs/2305.08980