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Static spherical vacuum solutions in the bumblebee gravity model [PDF]
Physical Review D, 2022 The bumblebee gravity model is a vector-tensor theory of gravitation where the vector field nonminimally couples to the Ricci tensor. By investigating the vacuum field equations with spherical symmetry, we find two families of black-hole (BH) solutions ...
R. Xu, Dicong Liang, Lijing Shao
semanticscholar +1 more source
Radiative corrections in metric-affine bumblebee model
Physics Letters B, 2022 We consider the metric-affine formulation of bumblebee gravity, derive the field equations, and show that the connection can be written as Levi-Civita of a disformally related metric in which the bumblebee field determines the disformal part.
Adria Delhom +4 more
doaj +1 more source
2009 Annual Conference & Exposition Proceedings, 2020 Comment: 15 ...
Brian Rodrigue +5 more
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Polarizations of gravitational waves in the bumblebee gravity model [PDF]
Physical Review D, 2022 Lorentz violation modifies the dispersion relation of gravitational waves (GWs), and induces birefringence and anisotropy in propagation. Our study shows that Lorentz violation can also activate multiple polarizations of GWs.
Dicong Liang, R. Xu, Xu Lu, Lijing Shao
semanticscholar +1 more source
Biology, 2021 Bumblebees are an important insect group occurring in different land ecosystems, but the number of these species has declined dramatically across Poland as well as in Europe in recent years.
Jolanta Bąk-Badowska +2 more
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Some observable physical properties of the higher dimensional dS/AdS black holes in Einstein-bumblebee gravity theory [PDF]
The European Physical Journal C, 2022 We study the greybody factors, quasinormal modes, and shadow of the higher dimensional de-Sitter (dS)/anti de-Sitter (AdS) black hole spacetimes derived from the Einstein-bumblebee gravity theory within the Lorentz symmetry breaking (LSB) framework.
Akhil Uniyal, Sara Kanzi, I. Sakalli
semanticscholar +1 more source
Effect of pollinator size on seed set in Lamium album var. barbatum [PDF]
Plant Ecology and Evolution, 2021 Background and aims – Previous researchers have demonstrated that geographic variation in pollinator community composition can generate diversity in the floral traits of animal-pollinated plants.
Mitsuru Hattori +2 more
doaj +3 more sources
Spontaneous Lorentz symmetry breaking and one-loop effective action in the metric-affine bumblebee gravity [PDF]
Journal of Cosmology and Astroparticle Physics, 2022 The metric-affine bumblebee model in the presence of fermionic matter minimally coupled to the connection is studied. We show that the model admits an Einstein frame representation in which the matter sector is described by a non-minimal Dirac action ...
Adrià Delhom +5 more
semanticscholar +1 more source
Genus-Wide Characterization of Nuclear Mitochondrial DNAs in Bumblebee (Hymenoptera: Apidae) Genomes
Insects, 2021 In eukaryotes, DNA of mitochondria is transferred into the nucleus and forms nuclear mitochondrial DNAs (NUMTs). Taking advantage of the abundant genomic resources for bumblebees, in this study, we de novo generated mitochondrial genomes (mitogenomes ...
Lele Ding, Huiling Sang, Cheng Sun
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Responses in honeybee and bumblebee activity to changes in weather conditions
Oecologia, 2023 Insect pollination, and in particular pollination by bees, is a highly valued ecosystem service that ensures plant reproduction and the production of high-quality crops.
Arrian Karbassioon +5 more
semanticscholar +1 more source