Spin and helicity
W helicity, top quark spin and charge
... produced unpolarized at the hadron colliders due to parity conservation in QCD and the unpolarised initial state, their spins are correlated [12]. The strength of the correlation can be expressed as A = (N ↑↑ + N ↓↓ − N ...
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Optical helicity, optical spin and related quantities in electromagnetic theory
... the spin angular momentum of ...well-defined spin angular momentum ...the spin angular momentum in the direction of propagation, the photon’s helicity, that is physically meaningful [5, ...
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Two Topics in Particle Physics. I. Tests for Helicity Conservation and Spin-Parity Selection Rules in Diffraction Dissociation. II. Independent Production of Pions
... s-channel reaction. The value of the-intercept implies that an amplit u d e dominated by pion exchange is predominantly real.. the relativistic extension of dispersion[r] ...
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Parton Momentum and Helicity Distributions in the Nucleon
... Experimentally, the extraction of leading twist spin-dependent PDFs at high x faces similar challenges to those discussed in Sec. 3.1 for the unpolarized distributions. In particular, information on the structure ...
Small x Asymptotics of the Quark and Gluon Helicity Distributions
... our helicity intercept (see the text for ...gluon spin, depending on where in x the e ff ects set in and on the parameterization of the gluon helicity PDF at higher ...
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Distortional Lifshitz Vectors and Helicity in Nematic Free Energy Density
... The helicity density is a pseudoscalar, having the same form of n n , that we have squared in the free energy ...the helicity is the projection of the spin onto the direction of ...to ...
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Roles of heating and helicity in ultrafast all optical magnetization switching in TbFeCo
... 3(g). We noticed that in the simulations, the switching times are slightly larger than with the analytical formula. This is due to the fact that for the analytical formula, rectangular tempera- ture and field pulses are ...
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Roles of heating and helicity in ultrafast all optical magnetization switching in TbFeCo
... laser helicity ef- fects, which is consistent with other reported works 28,29 ...and helicity is stimulated by a sin- gle laser ...macro- spin model based on the stochastic Landau-Lifschitz- Bloch ...
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Dirac Hamiltonian with Imaginary Mass and Induced Helicity—Dependence by Indefinite Metric
... for spin one-half ...right-handed helicity acquire a negative norm (“indefinite metric”) and can be excluded from the physical spectrum by a Gupta-Bleuler type ...
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Ratios of helicity amplitudes for exclusive ρ0 electroproduction on transversely polarized proton
... the helicity am- plitudes in the CM system describing ρ 0 -meson production by a virtual ...particular, Spin- Density-Matrix Elements (SDMEs) are functions of the helicity amplitude ratios ...
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Trefoil knot timescales for reconnection and helicity
... 3.1. Evolution as reconnection starts Figure 4 at t = 24 shows a severely contorted structure shortly before the time that visible reconnection begins. The blue vorticity isosurface and green vortex line have the ...
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Magnetic helicity condensation and the solar cycle
... magnetic helicity, are dominant in the northern / southern ...magnetic helicity injected by differential rotation along east – west oriented polarity inversion lines, posing a major conundrum for solar ...
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Helicity and Physical Fidelity in Turbulence Modeling
... its helicity treatment, the Leray-deconvolution tur- bulence model is a higher order and more accurate generalization of the Leray model, and the energy and helicity conserving (trapezoidal Galerkin) scheme ...
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Spin-lattice and spin-spin relaxation
... (with spin I > 1 / 2 ...The spin-lattice relaxation time determiness what recycle delay between pulses should be ...nuclear spin system must be allowed to relax back to equilibrium before the next ...
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Optical receiver with helicity dependent magnetization eversal
... propose helicity-dependent switching (HDS) of magnetization in Co/Pt for an energy efficient optical ...light helicity induced switching of magnetization which can avoid the requirement of photodiodes and ...
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Hyperconjugation is the source of helicity in perfluorinated n alkanes
... Thus, NBO analysis indicates that steric plus electrostatic interactions are the most important only for the smallest perfluoroalkanes and become progressively less important as the carbon chain grows, until ...
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Partitioning of magnetic helicity in reconnected flux tubes
... magnetic helicity that will aid its application to magnetic fi elds emerging from a ...magnetic helicity we require; Sections 3 and 4 consider two tubes with footpoints anchored in a plane, and derive ...
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Helicity modulus in the two-dimensional Hubbard model
... The helicity modulus, which is the stiffness associated with a twisted order parameter, for the two-dimensional Hubbard model is calculated for the equivalent cases of (i) attractive on-[r] ...
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Magnetic helicity of a flux rope in the magnetotail: THEMIS results
... the helicity in the flux rope originates from the IMF-geomagnetic fields interaction which is the beginning of a series of changes in the magnetospheric ...the helicity of the plasma sheet flux rope is an ...
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Forcing-dependent dynamics and emergence of helicity in rotating turbulence
... the helicity of the flow with the random-in-time forcing remains zero for all values of Ro f ...net helicity in rotating ...net helicity remains zero for any value of Ro f ...
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