S. Kullander
A5053912930- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Fish Biology and Ecology Studies
- Fish biology, ecology, and behavior
- Fish Ecology and Management Studies
- Nuclear physics research studies
- Nuclear Physics and Applications
- Identification and Quantification in Food
- Particle Detector Development and Performance
- Ichthyology and Marine Biology
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Quantum, superfluid, helium dynamics
- Species Distribution and Climate Change
- Aquatic Ecosystems and Biodiversity
- Magnetic confinement fusion research
- Atomic and Subatomic Physics Research
- Advanced NMR Techniques and Applications
- Plasma Diagnostics and Applications
- Aquatic Invertebrate Ecology and Behavior
- Radiation Detection and Scintillator Technologies
- Genomics and Phylogenetic Studies
- Genetic diversity and population structure
Swedish Museum of Natural History
2014-2023
Stockholm Environment Institute
2023
Xbrane Biopharma (Sweden)
2014
Royal Swedish Academy of Sciences
2009-2013
Stockholm University
1991-2012
Uppsala University
2002-2011
Max Planck Institute for Nuclear Physics
1997
Bielefeld University
1997
Heidelberg University
1997
Heidelberg University
1997
Experimental results obtained at the CERN Super Proton Synchrotron on structure-function ratio F2n/F2p in kinematic range 0.004<x<0.8 and 0.4<Q2<190 GeV2, together with structure function F2d determined from a fit to published data, are used derive difference F2p(x)-F2n(x). The value of Gottfried sum F(F2p-F2n)dx/x=0.240±0.016 is below quark-parton-model expectation 1/3.Received 23 January 1991DOI:https://doi.org/10.1103/PhysRevLett.66.2712©1991 American Physical Society
The muon-proton and muon-deuteron inclusive deep inelastic scattering cross sections were measured in the kinematic range 0.002 < × 0.60 0.5 Q2 75 GeV2 at incident muon energies of 90, 120, 200 280 GeV. These results are based on full data set collected by New Muon Collaboration, including taken with a small angle trigger. extracted values structure functions F2p F2d good agreement those from other experiments. cover sufficient y to allow determination ratio longitudinally transversely...
We present a new determination of the nonsinglet structure function Fp2 - Fn2 at Q2=4 GeV2 using recently measured values Fd2 and Fn2/Fp2. A evaluation Gottfried sum is given, which remains below simple quark-parton model value 1/3.Received 1 March 1994DOI:https://doi.org/10.1103/PhysRevD.50.R1©1994 American Physical Society
The ABC effect-a puzzling low-mass enhancement in the pipi invariant mass spectrum, first observed by Abashian, Booth, and Crowe-is well known from inclusive measurements of two-pion production nuclear fusion reactions. Here we report on exclusive kinematically complete most basic double-pionic reaction pn-->dpi;{0}pi;{0} at beam energies 1.03 1.35 GeV. measurements, which have been carried out CELSIUS-WASA, reveal effect to be a (pipi)_{I=L=0} channel phenomenon associated with both...
Crenicichla ploegi, new species, is described based on material from the Rio Juruena (Rio Papagaio, do Sangue, Arinos, and itself) tributaries of upper Paraguai (upper Jauru, Cabaçal Sepotuba) in Mato Grosso, Brazil. ploegi twenty-third species C. saxatilis group. It distinguished all other group by presence dark spots vermiculations snout, interorbital area dorsally head adults vs. markings absent or present only juveniles but adults, a deep strongly pigmented lateral band both occupying...
Satanoperca curupira, new species, is described from the rio Madeira basin in State of Rondônia, Brazil. It distinguished all congeners by following combination characters: 3-7 dark-brown oblique stripes on lachrymal (vs. 2 well-defined stripes, or absent) and an irregular pattern cheek opercular series without markings with light-beige rounded spots). According to meristic color characters, species considered a member S. jurupari group, syntopic jurupari, which widespread Amazon basin. The...
Danio htamanthinus, new species, is described from small streams in the vicinity of Htamanthi on middle Chindwin River. It most similar to D. choprae and flagrans Ayeyarwaddy River drainage, sharing same elaborate colour pattern with dark vertical bars a red interstripe along posterior side, but distinguished by absence P+1 stripe presence P represented only spots. The uncorrected p-distance mitochondrial COI gene separates htamanthinus 4.3% 7.5%. largest specimen 22.9 mm standard length...
Devario comprises 38 potentially valid species in southern Asia. Ten of have been reported so far from Myanmar, six which belong the group striped devarios, with predominantly horizontal stripes colour pattern. Among them, records D. aequipinnatus most likely represent misidentifications. Remaining devarios Myanmar are known only brief descriptions and need taxonomic revision. yuensis deruptotalea, previously India, here for first time Myanmar. fangae, new species, is described on basis...
Five species of Badidae are reported from Bangladesh, with morphological diagnoses and mitochondrial DNA sequences (cytochrome b, cytb; cytochrome c oxidase subunit I, coi). Dario kajal is recorded Bangladesh for the first time a precise locality. Badis badis several localities in central Bangladesh. chittagongis redescribed on basis samples region Cox′s Bazar, including Maheskhali Island. pallidus, new species, described Sangu Karnafuli River drainages It most similar to B. chittagongis,...
Results are presented for F2d/F2p and Rd − Rp from simultaneous measurements of deep inelastic muon scattering on hydrogen deuterium targets, at 90, 120, 200 280 GeV. The difference Rp, determined in the range 0.002 < x 0.4 an average Q2 5 GeV2, is compatible with zero. dependence was measured kinematic 0.001 0.8 0.1 145 GeV2 small statistical systematic errors. For > ratio decreases Q2.