How is spin independent and spin dependent related?
Spin independent proceeds through the scalar term and the spin dependent through the Axial term of the Lagrangian. The former is due to higgs and squark exchange while the later is due to Z and squark exchange. (Z & H are t-channel while squark contributes by t and s channel.
What happens to the amplitude of a spin dependent interaction?
If the interactions are spin-independent, this means that the amplitude is proportional the number of nucleons. However, in case of spin-dependent interaction, the amplitude changes sign if you reverse the spin of a nucleon.
How are Wimps different from spin dependent scattering?
In the search for WIMPs as the dark matter particle, there is an important distinction between spin-independent and spin-dependent scattering. Roughly, WIMPs scattering from nucleons through a spin-independent coupling are not sensitive to the spin (up or down) of the nucleon, while they are sensitive in this way for spin-dependent couplings.
Which is most sensitive to spin dependent interactions?
PICASSO is predominantly sensitive to spin-dependent interactions of WIMPs with the fluorine atoms. So spin dependence or independence is mathematically modeled and checked with data , in the various experiments.
What is the formal definition of spin independent vs.spin?
These terms describe the interaction of the neutralino with matter, i.e. identifying the LSP with WIMP and working in the SUSY framework. Spin independent proceeds through the scalar term and the spin dependent through the Axial term of the Lagrangian. The former is due to higgs and squark exchange while the later is due to Z and squark exchange.
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How are spin dependent and spin independent experiments performed?
So spin dependence or independence is mathematically modeled and checked with data , in the various experiments. Experiments prepare the detector nuclei in a known spin state. Is that right? @anna v – SRS Mar 15 ’17 at 10:03 I do not know the details.
How are spin independent scattering and spin dependent scattering related?
In particular, spin-independent scattering can lead to a boost in the total cross-section due to individual nucleons within a nucleus contributing coherently, while the spin-dependent cross-section is (I think) only proportional to the net spin of the nucleus.