Haakon A. Olsen
Cornell University
Polarization (waves)X-ray magnetic circular dichroismParticle physicsPhysicsGluonElectronCircular polarizationPhotonElliptical polarizationAtomic physicsNuclear physicsField (physics)ScatteringElastic scatteringPositronAngular distributionHigh energyQuantum electrodynamicsPair productionQuantum mechanicsBorn approximationRadiative transferQuarkBremsstrahlungPhoton polarization
20Publications
11H-index
410Citations
Publications 20
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Dirac wave functions for high-energy electrons channeled in crystals are obtained for crystal string potentials. Specifically, we study partial cylindrical wave expansions for ‘‘cylindrical constant and 1/r potentials. The periodicity along the crystal axis is taken into account as a perturbation to the cylindrical wave functions. We also find a Sommerfeld-Maue-like solution for the 1/r potential. The cross section for channeling electronpositron pair production in continuum states is obtained f...
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The quark-antiquark production cross section, including gluon radiative corrections to order {alpha}{sub {ital s}}, for high-energy spin-polarized electron-positron collisions is obtained. The gluon radiative corrections are functions of the maximum recorded scaled gluon momentum {ital X}{sub {ital g}}={ital E}{sub {ital g}}/{ital E} and are expressed by gluon form factors {ital F}{sub {ital i}}({bar {ital m}}{sub {ital f}},{ital X}{sub {ital g}}). Formulas for form factors are given for all val...
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Cross sections and asymmetries for massive quark-antiquark production in electron-positron collisions at the {ital Z}{sub 0} resonance are calculated, for the case of longitudinally polarized electrons. The polarizaton of {ital Z}{sub 0}, {ital P}{sub {ital Z}0}, for the initial electron polarization {ital P}{sub {minus}} is composed of {ital P}{sub {minus}} and the ``natural`` polarization {ital P}{sub {ital Z}}{sup 0}(0)=2{ital av}/({ital v}{sup 2}+{ital a}{sup 2}), and the composition rule fo...
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#1Martin LandrH-Index: 1
#2Kjell J. MorkH-Index: 7
Last. Haakon A. OlsenH-Index: 11
view all 3 authors...
On the basis of the improved Weizsaecker-Williams equivalent-photon spectrum of a fast charged particle, we calculate the radiative correction to this spectrum. The calculation involves the virtual-photon radiative correction, the soft- and hard-bremsstrahlung contributions, and the vacuum-polarization contribution. The results are used to calculate the radiative correction to two-photon production of neutral bosons and pair production of charged fermions and bosons. General features are that th...
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#1I. ØverbøH-Index: 9
#2Kjell J. MorkH-Index: 7
Last. Haakon A. OlsenH-Index: 11
view all 3 authors...
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