Browsing Τμήμα Φυσικής / Department of Physics by Title
Now showing items 711-730 of 1411
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Conference Object
N and N to Δ transition form factors from lattice QCD
(2007)We present recent lattice QCD results on nucleon form factors and N to Δ transition form factors. We predict the parity violating asymmetry in N to Δ and check the off-diagonal Goldberger-Treiman relation.
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Conference Object
N to Δ electromagnetic and axial form factors in full qcd
(2008)Lattice results on the N to Δ electromagnetic, axial-vector and pseudoscalar form factors are evaluated using dynamical staggered sea quarks and domain wall valence quarks for pion masses in the range of 580-350 MeV, as ...
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Article
N to Δ electromagnetic transition form factors from lattice QCD
(2004)The magnetic dipole, the electric quadrupole, and the Coulomb quadrupole amplitudes for the transition γN→Δ are evaluated both in quenched lattice QCD at β=6.0 and using two dynamical Wilson fermions simulated at β=5.6. ...
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Article
N-ality and topology at finite temperature
(2005)We study [JHEP 0309 (2003) 034] the spectrum of confining strings in SU(3) pure gauge theory, in different representations of the gauge group. Our results provide direct evidence that the string spectrum agrees with ...
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Article
N-to-Δ axial transition form factors from lattice QCD
(2007)We evaluate the N to Δ axial transition form factors in lattice QCD with no dynamical sea quarks, with two degenerate flavors of dynamical Wilson quarks, and using domain wall valence fermions with three flavors of staggered ...
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Article
N-to-Δ electromagnetic-transition form factors from lattice QCD
(2005)The magnetic dipole (M1), the electric quadrupole (E2), and the Coulomb quadrupole (C2) amplitudes for γN → Δ are calculated in quenched lattice QCD. Using a new method, which combines an optimal choice of interpolating ...
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Article
Narrow linewidth excimer laser for inscribing Bragg gratings in optical fibers
(1995)A spectrally narrow linewidth KrF excimer laser has been developed for the application of writing Bragg gratings in optical fibers. Two air spaced etalons 80 and 6 cm-1 have been incorporated within the laser cavity resulting ...
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Article
Narrow positron lines from U-U and U-Th collisions
(1984)Spectra of positrons emitted in heavy-ion-atom collisions close to the Coulomb barrier were measured. The data exhibit broad energy distributions according to expectations for induced positron creation by the strong ...
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Article
Natural radioelement concentration in the Troodos Ophiolite Complex of Cyprus
(2005)High-resolution γ-ray spectrometry was exploited to determine naturally occurring thorium (Th), uranium (U) and potassium (K) elemental concentrations in the whole area covered by the Troodos Ophiolite Complex of Cyprus. ...
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Article
Negative energy, superluminosity, and holography
(1999)The holographic connection between large N super Yang-Mills (SYM) theory and gravity in anti-de Sitter (AdS) space requires unfamiliar behavior of the SYM theory in the limit that the curvature of the AdS geometry becomes ...
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Article
Neutron electric dipole moment using Nf=2+1+1 twisted mass fermions
(2016)We evaluate the neutron electric dipole moment |d→N| using lattice QCD techniques. The gauge configurations analyzed are produced by the European Twisted Mass Collaboration using Nf=2+1+1 twisted mass fermions at one value ...
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Article
New compstatin peptides containing n-terminal extensions and non-natural amino acids exhibit potent complement inhibition and improved solubility characteristics
(2015)Compstatin peptides are complement inhibitors that bind and inhibit cleavage of complement C3. Peptide binding is enhanced by hydrophobic interactions
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Conference Object
New data on the differential cross section of the dp-elastic scattering at 2.5 GeV obtained with HADES detector
(Proceedings of Science (PoS), 2012)New results on the differential cross section in deuteron-proton elastic scattering are obtained at the deuteron kinetic energy of 2.5 GeV with the HADES spectrometer. The angular range of 69°-125° in the center of mass ...
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Article
A new kinetic term in the phenomenology of layered superconductors
(1993)We show that the Lawrence-Doniach free energy for layered superconductors can be derived from an anisotropic Ginzburg-Landau free energy with a spatially dependent coefficient for the quadratic term. Our derivation indicates ...
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Article
New light from hybrid inorganic-organic emitters
(2008)We present the highlights of a research programme on hybrid inorganic-organic light emitters. These devices combine recent developments in III-V nitride technology (including UV emitting micro-arrays and specifically ...
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Article
New limits for resonant Bhabha scattering around the invariant mass of 1.8 MeV/c2
(1988)The excitation function for Bhabha scattering was reinvestigated in the energy range between 775 and 840 keV (c.m.) in 1.4 keV steps using a monoenergetic e+ -beam and a high-resolution kinematic coincidence detector device. ...
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Article
A new look at the primary charge separation in bacterial photosynthesis
(1992)A theory for the primary charge separation in photosynthetic bacteria is presented. We propose that this reaction may lie in a regime that is different from the traditional nonadiabatic (golden rule) regime. In the context ...
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Article
New low density phase of interacting electrons: The paired electron crystal
(1992)A variational method shows that for a range of densities the compensated low density interacting electron system possesses a ground-state crystalline phase with L=0 spin-singlet pairs and with an energy lower than the ...
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Article
New results on e+e--line emission in U+Ta collisions ORANGE collaboration at GSI
(1997)We present new results obtained from a series of follow-up e+e--coincidence measurements in heavy-ion collisions, utilizing an improved experimental set-up at the double-Orange β-spectrometer of GSI. The collision system ...
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Article
The nitridation of ZnO nanowires
(2012)ZnO nanowires (NWs) with diameters of 50 to 250 nm and lengths of several micrometres have been grown by reactive vapour transport via the reaction of Zn with oxygen on 1 nm Au/Si(001) at 550°C under an inert flow of Ar. ...