by Maxim Khlopov on Tue 31 Mar 2020 18:57
1. What is the relationship of WIMP scattering on nuclei (the used formulae are appropriate for nonrelativistic particles) and its extension in relativistic case?
What is the source of these relativistic particles?
Which model of interaction is used in relativistic case?
The formulae used are calculated (as a generalization) from the definition of relativistic energy (which contains the relativistic velocity), and the limit to the non-relativistic case is well-defined.
The possible sources of relativistic particles, as discussed for the LHAASO experiment, can be of galactical orgin; the formulae used also suite the definition of the decay products from particle interactions (and their low-energy limit).
The model interaction is the standard particle-particle interaction or decay (KLSZ states) as in QFT. It applies to any particle interaction or decay product.
The WIMP scattering on nuclei depends on the model of WIMP used, and on the nuclei in the target of the detector. As from the (further references file Ref. 5 and Ref. 6), it applies also to granulous targets in the detector.
I would be grateful to You if You could specify whether further WIMP's models are needed be discussed, as from Your questions; indeed, the formlae for the energy differential is well defined in any case. I can send a more detailed .pdf file with further references.
[i]Хлопов Максим Юрьевич
Maxim Khlopov[/i]