Zobrazeno 1 - 10
of 150
pro vyhledávání: '"C. A. S. Almeida"'
Autor:
F. C. E. Lima, C. A. S. Almeida
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 9, Pp 1-10 (2023)
Abstract Building a multi-field theory with canonical and non-canonical contributions, one studies the topological solitons of the O(3)-sigma model. We propose a model constituted by the O(3)-sigma field, the cuscuton-like neutral scalar field, and M
Externí odkaz:
https://doaj.org/article/6e13e97f8c1a414dbe5ac0c57dade1be
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 5, Pp 1-14 (2023)
Abstract In the context of f(T, B) modified teleparallel gravity, we investigate the influence of torsion scalar T and boundary term B on the confinement of both the gauge vector and Kalb–Ramond fields. Both fields require a suitable coupling in fi
Externí odkaz:
https://doaj.org/article/76be3231c7c148b7b974309efd6b51a0
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 1, Pp 1-15 (2023)
Abstract This paper is aimed at investigating the behavior of gauge vector and tensor fields on thick brane in f(T) gravity. This thick brane is not capable of providing a normalizable zero mode for both gauge and Kalb Ramond fields. To overcome this
Externí odkaz:
https://doaj.org/article/2e0859ecbfef463fb03c9fa904c91213
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 8, Pp 1-9 (2022)
Abstract In this work, we study the higher-derivative massive gravity in D-dimensional space-time with the mass term arisen due to a 2-brane embedded in a 4D Minkowski spacetime. We consider the effect of a resonance mass term from the DGP braneworld
Externí odkaz:
https://doaj.org/article/58a832becfab4d809cda97df9aaebad7
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 12, Pp 1-17 (2021)
Abstract In this paper we study the thick brane scenario constructed in the recently proposed $$f(T,{\mathscr {T}})$$ f ( T , T ) theories of gravity, where T is called the torsion scalar and $${\mathscr {T}}$$ T is the trace of the energy–momentum
Externí odkaz:
https://doaj.org/article/74077e534c4c4504be0fc55e476fac1f
Autor:
F. C. E. Lima, C. A. S. Almeida
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-8 (2021)
Abstract We investigate the presence of topological structures and multiple phase transitions in the O(3)-sigma model with the gauge field governed by Maxwell’s term and subject to a so-called Gausson’s self-dual potential. To carry out this stud
Externí odkaz:
https://doaj.org/article/e68e27ea3f46427897de3c2be9d1b862
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 4, Pp 1-9 (2021)
Abstract We study a spin 1/2 fermion in a thick braneworld in the context of teleparallel f(T, B) gravity. Here, f(T, B) is such that $$f_1(T,B)=T+k_1B^{n_1}$$ f 1 ( T , B ) = T + k 1 B n 1 and $$f_2(T,B)=B+k_2T^{n_2}$$ f 2 ( T , B ) = B + k 2 T n 2
Externí odkaz:
https://doaj.org/article/66f7de14cb3a4bf5a7325a7de28fdefe
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 5, Pp 1-10 (2020)
Abstract In this work, we obtain the Casimir energy for the real scalar field and the Elko neutral spinor field in a field theory at a Lifshitz fixed point (LP). We analyze the massless and the massive case for both fields using dimensional regulariz
Externí odkaz:
https://doaj.org/article/e139d07bbae4418ba6f58695c40b9b9f
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 4, Pp 1-9 (2020)
Abstract We study the gravitation effects on a static and spherically symmetric spacetime due to the vacuum expectation value (VEV) of a Kalb–Ramond field. The Kalb–Ramond VEV is a background tensor field which produces a local Lorentz symmetry b
Externí odkaz:
https://doaj.org/article/ea9c3b9f5d9b4ef6810d0cb67b23650e
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 1, Pp 1-8 (2019)
Abstract In this work, we propose a new class of smooth thick string-like braneworld in six dimensions. The brane exhibits a varying brane-tension and an AdS asymptotic behavior. The brane-core geometry is parametrized by the Bulk cosmological consta
Externí odkaz:
https://doaj.org/article/80b187ec136042809ed974456cd2e67d