Results 121 to 130 of about 12,458,012 (347)
Journal of Fish Biology, EarlyView.Abstract Southern Africa is a region denoted by both high levels of fish diversity, some of it cryptic and unrecognised by current taxonomy, and severely threatened freshwater ecosystems. The Waterberg, a key aquatic ecoregion of the greater Limpopo River basin in South Africa, represents an area with high terrestrial conservation value but is lacking ...
Darragh J. Woodford +7 more
wiley +1 more source
Lepto-quark portal dark matter
Journal of High Energy Physics, 2018 We consider the extension of the Standard Model with scalar leptoquarks as a portal to dark matter (DM), motivated by the recent anomalies in semi-leptonic B-meson decays. Taking singlet and triplet scalar leptoquarks as the best scenarios for explaining
Soo-Min Choi +3 more
doaj +1 more source
Journal of Systematics and Evolution, EarlyView.We present the most densely sampled phylogeny of Carex section Lupulinae to date (107 specimens) and describe herein a new cryptic species for science from the southern United States, which is locally abundant and found in well‐explored and densely populated areas. Combining DNA sequences with morphometric data obtained from 299 samples, we Demonstrate
Étienne Lacroix‐Carignan +4 more
wiley +1 more source
The promise of digital herbarium specimens in large‐scale phenology research
New Phytologist, EarlyView.Summary The online mobilization of herbaria has made tens of millions of specimens digitally available, revolutionizing investigations of phenology and plant responses to climate change. We identify two main themes associated with this growing body of research and highlight a selection of recent publications exemplifying: investigating phenology at ...
Natalie Iwanycki Ahlstrand +5 more
wiley +1 more source
Semi-leptonic decays of B-mesons [PDF]
Nuclear Physics B - Proceedings Supplements, 1995 3 pages, uuencoded compressed postscript file; contribution to Lattice '94, 27 Sep - 1 Oct, Bielefeld, Germany; to appear in the ...
openaire +2 more sources
New Phytologist, EarlyView.Summary Herbarium specimens are widely distributed in space and time, thereby capturing diverse conditions. We reconstructed specimen ‘lived’ climate from knowledge of germination cues and collection dates for 14 annual species in the Streptanthus (s.l.) clade (Brassicaceae) to ask: which climate attributes best explain specimen phenological stage and ...
Megan Bontrager +6 more
wiley +1 more source
Constraining inverse moment of B-meson distribution amplitude using Lattice QCD data
Physics Letters BWe constrain the inverse moment of the B-meson light-cone distribution amplitude (LCDA), λB in heavy quark effective theory, using form factor estimates from Lattice QCD collaboration.
Rusa Mandal, Soumitra Nandi, Ipsita Ray
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Rare four-leptonic B-decays with light leptons in the final state in the Standard Model
EPJ Web of Conferences, 2017 We present predictions for the four-leptonic decays of B−-mesons with three light charged leptons and one neutrino in the final states. We obtain the branching ratio for B − → μ + μ − e − v ¯ e decay at the level 1.3 × 10−7 taking into
Danilina Anna, Nikitin Nikolai
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Weak decays of $$B_c$$ Bc into two hadrons under flavor SU(3) symmetry
European Physical Journal C: Particles and Fields, 2018 A large number of $$B_c$$ Bc meson events have been recorded at the LHCb detector, especially some two-body hadronic decay modes. We analyzed the weak decays of the $$B_c$$ Bc meson into two hadron states under the flavor SU(3) symmetry.
Ruilin Zhu +3 more
doaj +1 more source