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Showing 1 to 20 of 135 for “"Matrix elements"”.
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Precision Measurement of Relative Dipole Matrix Elements in Atomic Sodium
<p>Relative dipole matrix elements are measured by means of a new spectroscopic technique called polarization interference spectroscopy. It is a two-color two-photon nonresonant process that maps the matrix elements into the energy domain by means of quantum mechanical interference. The technique …
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Determination of Mueller matrix elements in the presence of imperfections in optical components
… originally introduced to determine nine Mueller matrix elements from Fourier analysis of the output signal of a photodetector. The arrangement is modified to the P'PSAA' arrangement where P' and A' represent fixed polarizers that are added at both ends with the speed ratio of the rotating …
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Two-Photon Quantum Interference Polarization Spectroscopy: Measurements of Transition Matrix Elements in Atomic Rubidium
<p>The estimation of the adequacy of theoretical calculations on the atomic structure requires availability of the precise experimental data on radiative properties of the atoms. Such data is also required in astronomy and some important areas of technology. The lack of precision of traditional …
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Short-distance matrix elements for D-meson mixing for 2+1 flavor lattice QCD
"We study the short-distance hadronic matrix elements for $D$-meson mixing with partially quenched $N_f=2+1$ lattice QCD. We use a large set of the MIMD Lattice Computation Collaboration's gauge configurations with $a^2$ tadpole-improved staggered sea quarks and tadpole-improved L\""uscher-Weisz …
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Determination of the link between heavy ion charge exchange reactions and single and double beta decay matrix elements
Sono stati condotti studi teorici sulle reazioni nucleari di scambio di carica tra ioni pesanti, a basse energie, ponendo l'attenzione sull'interazione tra la struttura nucleare e la dinamica di reazione. Tali studi hanno anche permesso di mettere in luce il legame fra la sezione d urto, a piccoli …
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Determination of the Neutral B Meson and Neutral B(s) Meson Mixing Matrix Elements in 2+1 Lattice QCD
… presents a calculation and results for the matrix elements relevant for the analysis of B0 -- B¯0 mixing using the Asqtad (light-quark) and Fermilab (heavy-quark) actions. The calculation is performed on the 2+1 MILC ensembles at three different lattice spacings, and uses staggered …
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A Study of Omega-Zero Spin-Density Matrix Elements in the Reaction Negative Pion-Proton Going to Neutral Omega-Resonance Neutron at 3.65, 4.5, and 5.5 Gev/c
Made available in DSpace on 2015-05-12T22:38:45Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7207041.PDF: 1973655 bytes, checksum: 8e97fccaee54eca5d59800e73da23f41 (MD5) Previous issue date: 1971
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A Study of the Omega-Zero Spin-Density Matrix Elements in the Reaction Pi-Minus Proton Goes to Omega-Zero Neutron at 3.65, 4.5, and 5.5 GeV/c
A study was made of the WO spin-density matrix elements in the o reaction TI p~ n. The data were collected using a combination of scintillation counters and optical spark chambers designed to detect events of the type + TI p-TI TI yyn. Incident pions of momenta 3.65, 4.5, and 5.5 GeV/c were …
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A Study of the Omega-Zero Spin-Density Matrix Elements in the Reaction Pi-Minus Proton Goes to Omega-Zero Neutron at 3.65, 4.5, and 5.5 GeV/c
Submitted by Rachelle Ramer (rramer2@illinois.edu) on 2012-01-20T23:24:32Z No. of bitstreams: 1 1971_rosenberg.pdf: 2216476 bytes, checksum: aac4bf990c58ba48d8a149f866279450 (MD5)
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Exploring proton structure using lattice QCD
… functions which con- tribute to the off forward matrix elements of the twist two operators. These matrix elements determine the generalized form factors of the nucleon which in turn give the moments of the generalized parton distributions. Thus we use our building block method to calculate all …
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Product Basis Set Variational Calculations of Triatomic Rovibrational Energy Levels and Wavefunctions
… internal coordinate functions, the Hamiltonian matrix may be speedily built because all required integrals are one-dimensional. New methods, especially for calculating potential energy matrix elements, have dramatically decreased the time required for the matrix build, and have also improved the …
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Perturbative renormalization of proton observables in lattice QCD using domain wall fermions
… principles is lattice QCD. Experiments measure matrix elements of light cone operators ... where diagonal elements specify the quark density distribution q(x), quark helicity distribution [delta] q(x) and quark transversity distribution [delta] q(x). Off-diagonal elements determine form factors …
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Investigating on elastic and inelastic nuclear scattering and polarisation
… scattering amplitude. Parameterised elastic S-matrix elements are used in the Austern-Blair theory to obtain the inelastic S-matrix elements. Relations between elastic and inelastic cross sections and polarisations are derived. The resulting phase rules are discussed. A modification of the …
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The brown muck of b^0 and b^0_s mixing: beyond the standard model
… hadronization, characterized by hadronic mixing matrix elements. This thesis describes a calculation of the hadronic mixing matrix elements relevant to a large class of new physics models. The calculation is performed via lattice QCD using the MILC collaboration’s gauge configurations with 2 + 1 …
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Monte-Carlo event generation for the LHC
… emissions with the help of exact tree-level matrix elements is revisited and significantly improved as attested by first results. In a next step, an automated implementation of the POWHEG method is presented. It allows for the combination of parton showers with full next-to-leading order QCD …
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Applications of group theory to few-body physics
… in this derivation is the calculation of the matrix elements of the various channels. We develop a systematic method, based on group theory, for calculating matrix elements of few-body correlated spatial wavefunctions. This method can, in some sense, be considered a generalization of Racah's …
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Theoretical Investigation of Two-Color, Two-Photon, 6s(2)S(1/2) → 5d(2)D(j) → 11p(2)P(3/2) Excitation and Depolarization Spectra in Atomic Cesium
… of excitation from the ratio of reduced matrix elements is shown. The experimental method of determination of the value and sign of the ratio is proposed. Comparison of results for co- and counterpropagating beams revealed the strong dependence of the transition rate on the relative beam …
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Radiative Transitions in Charmonium
… ideal as an input for the calculation of matrix elements. We explore techniques which leverage data over many time slices to increase statistics as well as a robust method of determining multiple form factors with generic kinematics. From these matrix elements, form factors are determined …
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Separation, preconcentration and determination of rare earth elements by inductively coupled plasma emission spectroscopy
Rare earth elements, (REE), at ug g⁻¹ levels are used for studies of petrogenisis of different geological materials. For these studies, the REE must be determined precisely. An analytical program was established using an IL 200 Inductively Coupled Plasma, (ICP), spectrometer for the determination …
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