54 research outputs found
Re-theorising mobility and the formation of culture and language among the Corded Ware Culture in Europe
Descriptive and Comparative Linguistic
Electroexcitation of the at low momentum transfer
We report on new p measurements at the
resonance at the low momentum transfer region. The mesonic
cloud dynamics is predicted to be dominant and rapidly changing in this
kinematic region offering a test bed for chiral effective field theory
calculations. The new data explore the low dependence of the resonant
quadrupole amplitudes while extending the measurements of the Coulomb
quadrupole amplitude to the lowest momentum transfer ever reached. The results
disagree with predictions of constituent quark models and are in reasonable
agreement with dynamical calculations that include pion cloud effects, chiral
effective field theory and lattice calculations. The reported measurements
suggest that improvement is required to the theoretical calculations and
provide valuable input that will allow their refinements
Probing the Repulsive Core of the Nucleon-Nucleon Interaction via the 4He(e,e'pN) Triple-Coincidence Reaction
We studied simultaneously the 4He(e,e'p), 4He(e,e'pp), and 4He(e,e'pn)
reactions at Q^2=2 [GeV/c]2 and x_B>1, for a (e,e'p) missing-momentum range of
400 to 830 MeV/c. The knocked-out proton was detected in coincidence with a
proton or neutron recoiling almost back to back to the missing momentum,
leaving the residual A=2 system at low excitation energy. These data were used
to identify two-nucleon short-range correlated pairs and to deduce their
isospin structure as a function of missing momentum in a region where the
nucleon-nucleon force is expected to change from predominantly tensor to
repulsive. Neutron-proton pairs dominate the high-momentum tail of the nucleon
momentum distributions, but their abundance is reduced as the nucleon momentum
increases beyond ~500 MeV/c. The extracted fraction of proton-proton pairs is
small and almost independent of the missing momentum in the range we studied.
Our data are compared with ab-initio calculations of two-nucleon momentum
distributions in 4He.Comment: 6 pages, 2 figure
Glionitrin B, a Cancer Invasion Inhibitory Diketopiperazine Produced by Microbial Coculture
ChemInform Abstract: The Conformation and Vibrational Spectra of Isocyanato and Isothiocyanatocyclohexane.
ChemInform Abstract: Stereo- and Regiocontrol in Palladium-Catalyzed Allylic Alkylation Using 1,10-Phenanthrolines as Ligands.
ChemInform Abstract: The C1s Core Shake-up Spectra of Alkene Molecules: An Experimental and Theoretical Study.
Institutional relationship between banks and industry The Swedish case
SIGLEGBUnited Kingdo
Extensive pathological analysis of selected melanoma sentinel lymph nodes:high metastasis detection rates at reduced workload
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