搜索结果: 1-15 共查到“理学 helicity”相关记录27条 . 查询时间(0.068 秒)
Quasi-plane waves for spin 1 field in Lobachevsky space and a generalized helicity operator
Quasi-plane waves spin 1 field Lobachevsky space generalized helicity operator Mathematical Physics
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2012/5/9
Spin 1 particle is investigated in 3-dimensional curved space of constant negative curvature. An extended helicity operator is defined and the variables are separated in a tetrad-based 10-dimensional ...
Helicity -- from Clifford to Graphene
Helicity Clifford Graphene Mathematical Physics
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2012/4/17
We investigate two seemingly disjoint definitions of helicity, one commonly used in particle physics, the other one used when studying bilinear covariants of Clifford algebras. We can prove that the `...
On the injection of helicity by shearing motion of fluxes in relation to Flares and CMEs
activity flares magnetic fields Coronal Mass ejections magnetic polarity inversion line
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2012/2/24
An investigation of helicity injection by photospheric shear motions is presented for two active regions, NOAA 11158 and 11166, using LOS magnetic field observations obtained from the Helioseismic and...
Helicity and dynamo action in magnetized stellar radiation zones
magnetohydrodynamics (MHD) – instabilities – stars: magnetic fi elds – stars: interiors
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2011/10/8
Helicity and \alpha effect driven by the nonaxisymmetric Tayler instability of toroidal magnetic fields in stellar radiation zones are computed. In the linear approximation a purely toroidal field alw...
Spectroscopic evidence for helicity in explosive events
Sun: UV radiation—Sun: transition region— Sun: chromosphere
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2011/9/30
We report spectroscopic observations in support of a novel view of transition region explosive events, observations that lend empirical evidence that at least in some cases explosive events may be not...
Cross-helicity effects and turbulent transport in magnetohydrodynamic flow
Cross-helicity effects turbulent transport magnetohydrodynamic
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2011/9/28
In the presence of large-scale vortical motions and/or magnetic-field strains, the turbulent cross helicity (velocity--magnetic-field correlation in fluctuations) may contribute to the turbulent elect...
Reynolds number dependence of kinetic helicity decay in linearly forced turbulence
Reynolds number dependence linearly forced turbulence
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2010/12/28
The decay of kinetic helicity is studied in numerical models of forced turbulence using either an externally imposed forcing function as an inhomogeneous term in the equations or, lternatively, a term...
Magnetic helicity transport in the advective gauge family
Magnetic helicity transport the advective gauge family
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2011/1/13
Magnetic helicity fluxes are investigated in a family of gauges in which the contribution from ideal magnetohydrodynamics takes the form of a purely advective flux. Numerical simulations of magnetohyd...
Measurement of the W boson helicity in top quark decays using 5.4 fb^-1 of ppbar collision data
W boson helicity top quark decays 5.4 fb^-1 of ppbar collision data
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2011/1/5
We present a measurement of the helicity of the W boson produced in top quark decays using
t¯t decays in the ℓ+jets and dilepton final states selected from a sample of 5.4 fb−1 of co...
Helicity-dependent reaction \vec γ\vec d\to πNN and its contribution to the GDH sum rule for the deuteron
Helicity-dependent reaction πNN contribution the GDH sum rule the deuteron
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2010/12/31
Helicity-dependent incoherent pion photoproduction in the reaction \vec \gamma \vec d\to \pi NN is studied in the framework of the diagrammatic approach. Contributions to the reaction amplitude from d...
Helicity-dependent reaction \vec γ\vec d\to πNN and its contribution to the GDH sum rule for the deuteron
Helicity-dependent reaction πNN contribution the GDH sum rule the deuteron
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2010/12/31
Helicity-dependent incoherent pion photoproduction in the reaction \vec \gamma \vec d\to \pi NN is studied in the framework of the diagrammatic approach. Contributions to the reaction amplitude from d...
Phase transition to the state with nonzero average helicity in dense neutron matter
Phase transition state with nonzero average helicity dense neutron matter
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2011/1/6
The possibility of the appearance of the states with a nonzero average helicity in neutron matter is studied in the model with the Skyrme effective interaction. By providing the analysis of the selfco...
Helicity-dependent reaction \vec γ\vec d\to πNN and its contribution to the GDH sum rule for the deuteron
Helicity-dependent reaction \vec γ\vec d\to πNN GDH sum rule deuteron
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2011/1/6
Helicity-dependent incoherent pion photoproduction in the reaction ~γ ~d → πNN is studied in the framework of the diagrammatic approach. Contributions to the reaction amplitude from diagrams correspon...
Phase transition to the state with nonzero average helicity in dense neutron matter
Phase transition nonzero average dense neutron matter
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2010/11/16
The possibility of the appearance of the states with a nonzero average helicity in neutron matter is studied in the model with the Skyrme effective interaction. By providing the analysis of the selfco...
Helicity of Solar Active Regions from a Dynamo Model
MHD—Sun activity—Sun magnetic fields—sunspots
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2010/9/16
We calculate helicities of solar active regions based on the idea that poloidal flux lines get wrapped around a toroidal flux tube rising through the convection zone, thereby giving rise to the helici...