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Revisiting puffy dark matter with novel insights: partial wave analysis.
- Source :
-
Journal of High Energy Physics . Jun2023, Vol. 2023 Issue 6, p1-18. 18p. - Publication Year :
- 2023
-
Abstract
- We present a comprehensive study on the self-interaction cross-section of puffy dark matter (DM) particles, which have a significant intrinsic size compared to their Compton wavelength. For such puffy DM self-interaction cross-section in the resonant and classical regimes, our study demonstrates the significance of the Yukawa potential and the necessity of partial wave analysis: (i) Due to the finite-size effect of puffy DM particles, the new Yukawa potential of puffy DM is found to enlarge the Born-effective regime for the self-interaction cross-section, compared with the point-like DM; (ii) Our partial wave analysis shows that depending on the value of the ratio between Rχ (radius of a puffy DM particle) and 1/mϕ (force range), the three regimes (Born-effective, resonant and classical) for puffy DM self-interaction cross-section can be very different from the point-like DM; (iii) We find that to solve the small-scale anomalies via self-interacting puffy DM, the Born-effective and the resonant regimes exist for dwarf galaxies, while for the cluster and Milky Way galaxy the non-Born regime is necessary. [ABSTRACT FROM AUTHOR]
- Subjects :
- *WAVE analysis
*DARK matter
*MILKY Way
*DWARF galaxies
Subjects
Details
- Language :
- English
- ISSN :
- 11266708
- Volume :
- 2023
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Journal of High Energy Physics
- Publication Type :
- Academic Journal
- Accession number :
- 165036529
- Full Text :
- https://doi.org/10.1007/JHEP06(2023)103