scholarly journals A Nonlocal Potential Form for s-wave α - α Scattering

1998 ◽  
Vol 51 (1) ◽  
pp. 47
Author(s):  
M. T. Bennett ◽  
K. Amos
Keyword(s):  
Density Matrix ◽  
Low Energy ◽  
Nonlocal Interaction ◽  
Particle Interactions ◽  
Matrix Elements ◽  
Nonlocal Potential ◽  
S Wave ◽  
Α Phase ◽  
Potential Form ◽  
Energy Dependent

Low energy s-wave α–α phase shifts that agree well with the measured set have been extracted using a nonlocal interaction formed by folding (local real energy-dependent) nucleon-α–particle interactions with density matrix elements of the (projectile) α–particle. The resultant s-wave α–α interaction is energy dependent and nonlocal.

The role of an energy-dependent inner potential in quantitative low-energy electron diffraction

2000 ◽  
Vol 458 (1-3) ◽  
pp. 155-161 ◽  
Author(s):  
S Walter ◽  
V Blum ◽  
L Hammer ◽  
S Müller ◽  
K Heinz ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Low Energy ◽  
Energy Electron ◽  
Low Energy Electron Diffraction ◽  
Low Energy Electron ◽  
Energy Dependent

Can the skyrme model describe low-energy s-wave π-nucleon scattering?

1990 ◽  
Vol 506 (3-4) ◽  
pp. 532-538 ◽  
Author(s):  
B.K. Jennings ◽  
O.V. Maxwell
Keyword(s):  
Skyrme Model ◽  
Low Energy ◽  
S Wave ◽  
Nucleon Scattering

C+‐energy‐dependent residual ion damage in GaAs:C grown by the low‐energy ion‐beam doping method

1996 ◽  
Vol 80 (7) ◽  
pp. 3828-3833 ◽  
Author(s):  
Tsutomu Iida ◽  
Yunosuke Makita ◽  
Takayuki Shima ◽  
Shinji Kimura ◽  
Joachim Horn ◽  
...  
Keyword(s):  
Ion Beam ◽  
Low Energy ◽  
Ion Damage ◽  
Energy Dependent

scholarly journals Spin Density Matrix Elements in Exclusive Production of Omega Mesons at HERMES

2016 ◽  
Vol 40 ◽  
pp. 1660063
Author(s):  
Hrachya Marukyan
Keyword(s):  
Density Matrix ◽  
Spin Density ◽  
Cross Section ◽  
Transverse Cross Section ◽  
Spin Density Matrix ◽  
Pion Pole ◽  
Matrix Elements ◽  
Unnatural Parity ◽  
Proton Data ◽  
Parity Exchange

Exclusive electroproduction of [Formula: see text] mesons on unpolarized hydrogen and deuterium targets is studied at HERMES in the kinematic region of [Formula: see text], [Formula: see text], and [Formula: see text]. The data were accumulated during the 1996-2007 running period using the [Formula: see text] longitudinally polarized electron or positron beams at HERA. The determination of the virtual-photon longitudinal-to-transverse cross-section ratio shows that a considerable part of the cross section arises from transversely polarized photons. Spin density matrix elements are derived and presented in projections of [Formula: see text] or [Formula: see text]. Violation of s-channel helicity conservation is observed for some of these elements. A sizable contribution from unnatural-parity-exchange amplitudes is found and the phase shift between those amplitudes that describe transverse [Formula: see text] production by longitudinal and transverse virtual photons is determined for the first time. Good agreement is found between the HERMES proton data and results of a pQCD-inspired phenomenological model that includes pion-pole contributions.

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