Search Results - "Bergström, Lars"

New limits on dark matter annihilation from Alpha Magnetic Spectrometer cosmic ray positron data by Bergström, Lars, Bringmann, Torsten, Cholis, Ilias, Hooper, Dan, Weniger, Christoph

“…The Alpha Magnetic Spectrometer experiment onboard the International Space Station has recently provided cosmic ray electron and positron data with…”
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Prospects of detecting gamma-ray emission from galaxy clusters: Cosmic rays and dark matter annihilations by Pinzke, Anders, Pfrommer, Christoph, Bergström, Lars

“…We study the possibility for detecting gamma-ray emission from galaxy clusters. We consider (1) leptophilic models of dark matter (DM) annihilation that…”
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Dark matter interpretation of recent electron and positron data by Bergström, Lars, Edsjö, Joakim, Zaharijas, Gabrijela

“…We analyze the recently released Fermi-LAT data on the sum of electrons and positrons. Compared to a conventional, pre-Fermi, background model, a surprising…”
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Phosphorus Leaching in Relation to Soil Type and Soil Phosphorus Content by Djodjic, Faruk, Börling, Katarina, Bergström, Lars

“…ABSTRACT Phosphorus losses from arable soils contribute to eutrophication of freshwater systems. In addition to losses through surface runoff, leaching has…”
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Complementarity of direct dark matter detection and indirect detection through gamma rays by Bergström, Lars, Bringmann, Torsten, Edsjö, Joakim

“…We show, by using an extensive sample of viable supersymmetric models as templates, that indirect detection of dark matter through gamma rays may have a large…”
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Dark matter candidates by Bergstrom, Lars

“…An overview is given of various dark matter candidates. Among the many suggestions given in the literature, axions, inert Higgs doublet, sterile neutrinos,…”
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Phosphorus leaching from loamy sand and clay loam topsoils after application of pig slurry by Liu, Jian, Aronsson, Helena, Bergström, Lars, Sharpley, Andrew

“…Appropriate management of animal waste is essential for guaranteeing good water quality. A laboratory leaching study with intact soil columns was performed to…”
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Leaching and crop uptake of nitrogen from nitrogen-15-labeled green manures and ammonium nitrate by Bergstrom, L, Kirchmann, H

“…Green manures can be used as an N source for agricultural crops as a substitute for inorganic N fertilizers. The effects of using green manures on leaching and…”
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Possibilities for Reducing Nitrate Leaching from Agricultural Land by Kirchmann, Holger, Johnston, A. E. Johnny, Bergström, Lars F

“…Agricultural soil is a contributor of nitrate to natural waters. High nitrate levels in water leached from soils are related to high nitrate concentrations in…”
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Land use, geology and soil properties control nutrient concentrations in headwater streams by Djodjic, Faruk, Bieroza, Magdalena, Bergström, Lars

“…Nutrient losses from headwater catchments (<50 km2) cause eutrophication problems downstream. Catchment properties are strongly reflected in the levels of…”
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Spectral gamma-ray signatures of cosmological dark matter annihilations by Bergström, L, Edsjö, J, Ullio, P

“…We propose a new signature for weakly interacting massive particle (WIMP) dark matter, a spectral feature in the diffuse extragalactic gamma-ray radiation…”
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Past, present, and future use of phosphorus in Chinese agriculture and its influence on phosphorus losses by Li, Haigang, Liu, Jian, Li, Guohua, Shen, Jianbo, Bergström, Lars, Zhang, Fusuo

“…Large inputs of phosphorus (P) in chemical fertilizers and feed supplements since 1978 have improved soil P status in arable land in China, but have also…”
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Dark matter evidence, particle physics candidates and detection methods by Bergstrom, L

“…The problem of the dark matter in the universe is reviewed. A short history of the subject is given, and several of the most obvious particle candidates for…”
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Gamma Rays from Dark Matter Annihilations Strongly Constrain the Substructure in Halos by Pinzke, Anders, Pfrommer, Christoph, Bergström, Lars

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Phosphorus Leaching from Two Soils with Catch Crops Exposed to Freeze–Thaw Cycles by Riddle, Matthew Unwin, Bergstrőm, Lars

“…Catch crops have been found to decrease leaching of nitrates into surface water and groundwater, but they also have the potential to increase P loadings to…”
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Phosphorus speciation in a long-term manure-amended soil profile – Evidence from wet chemical extraction, 31P-NMR and P K-edge XANES spectroscopy by Schmieder, Frank, Bergström, Lars, Riddle, Matthew, Gustafsson, Jon-Petter, Klysubun, Wantana, Zehetner, Franz, Condron, Leo, Kirchmann, Holger

“…Long-term application of manure can lead to an enrichment of phosphorus (P) in agricultural soils. To which extent this P leaches into drainage systems and…”
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Spray drift as influenced by meteorological and technical factors by Arvidsson, Tommy, Bergström, Lars, Kreuger, Jenny

“…BACKGROUND: The objective of this study was to investigate spray drift from a conventional field sprayer as influenced by meteorological and technical factors,…”
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New positron spectral features from supersymmetric dark matter: A way to explain the PAMELA data? by Bergström, Lars, Bringmann, Torsten, Edsjö, Joakim

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Soils potentially vulnerable to phosphorus losses: speciation of inorganic and organic phosphorus and estimation of leaching losses by Djodjic, Faruk, Bergström, Lars, Schmieder, Frank, Sandström, Corine, Agback, Peter, Hu, Yongfeng

“…Eutrophication is an important threat to aquatic ecosystems world-wide, and reliable identification of areas vulnerable to phosphorus (P) losses from diffuse…”
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Magnetite-coated biochar as a soil phosphate filter: From laboratory to field lysimeter by Riddle, Matthew, Cederlund, Harald, Schmieder, Frank, Bergström, Lars

“…Agriculture is one of the largest anthropogenic contributors of phosphorus (P) to surface waters and reducing these P loads is a target set by many countries…”
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