Global monopole in a Ricci-coupled Kalb–Ramond bumblebee gravity.
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| Title: | Global monopole in a Ricci-coupled Kalb–Ramond bumblebee gravity. |
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| Authors: | Belchior, Fernando M.1 (AUTHOR) belchior@fisica.ufc.br, Maluf, Roberto V.1 (AUTHOR) r.v.maluf@fisica.ufc.br, Petrov, Albert Yu.2 (AUTHOR) petrov@fisica.ufpb.br, Porfírio, Paulo J.2 (AUTHOR) pporfirio@fisica.ufpb.br |
| Source: | European Physical Journal C -- Particles & Fields. Jun2025, Vol. 85 Issue 6, p1-15. 15p. |
| Subjects: | Lorentz invariance, Deflection (Light), Black holes, Symmetry breaking, Bumblebees |
| Abstract: | In this paper, we investigate black hole solutions in Einstein–Kalb–Ramond (EKR) bumblebee gravity sourced by a global monopole characterized by the charge η . This modified theory of gravity possesses the notable feature of incorporating local Lorentz symmetry breaking (LSB) via a spontaneous symmetry-breaking mechanism. We solve the field equations for a static and spherically symmetric metric with the Kalb–Ramond (KR) field fixed at its VEV, thereby obtaining new black hole solutions. These solutions simultaneously exhibit the LSB effects, codified by the γ parameter, and the global monopole effects, codified by the charge η . Next, we study the impact of the global monopole and LSB corrections on two classical tests, namely, the advance of Mercury's perihelion and the light deflection. Furthermore, we compute the Hawking temperature, black hole shadows, and greybody factors. Ultimately, we investigate the processes of scattering and absorption of a massless scalar field by employing the partial wave method. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | In this paper, we investigate black hole solutions in Einstein–Kalb–Ramond (EKR) bumblebee gravity sourced by a global monopole characterized by the charge η . This modified theory of gravity possesses the notable feature of incorporating local Lorentz symmetry breaking (LSB) via a spontaneous symmetry-breaking mechanism. We solve the field equations for a static and spherically symmetric metric with the Kalb–Ramond (KR) field fixed at its VEV, thereby obtaining new black hole solutions. These solutions simultaneously exhibit the LSB effects, codified by the γ parameter, and the global monopole effects, codified by the charge η . Next, we study the impact of the global monopole and LSB corrections on two classical tests, namely, the advance of Mercury's perihelion and the light deflection. Furthermore, we compute the Hawking temperature, black hole shadows, and greybody factors. Ultimately, we investigate the processes of scattering and absorption of a massless scalar field by employing the partial wave method. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 14346044 |
| DOI: | 10.1140/epjc/s10052-025-14390-9 |
