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• W2029043749 abstract "Self-interacting dark matter (SIDM) was introduced by Spergel and Steinhardt to address possible discrepancies between collisionless dark matter simulations and observations on scales of less than 1 Mpc. We examine the case in which dark matter particles not only have strong self-interactions but also have strong interactions with baryons. The presence of such interactions will have direct implications for nuclear and particle astrophysics. Among these are a change in the predicted abundances from big bang nucleosynthesis (BBN) and the flux of $ensuremath{gamma}$ rays produced by the decay of neutral pions which originate in collisions between dark matter and galactic cosmic rays (CR). From these effects we constrain the strength of the baryon--dark-matter interactions through the ratio of baryon--dark-matter interaction cross section to dark matter mass, s. We find that BBN places a weak upper limit on this ratio $ensuremath{lesssim}{10}^{8} {mathrm{cm}}^{2}{mathrm{g}}^{ensuremath{-}1}.$ CR-SIDM interactions, however, limit the possible DM-baryon cross section to $ensuremath{lesssim}5ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}3} {mathrm{cm}}^{2}{mathrm{g}}^{ensuremath{-}1};$ this rules out an energy-independent interaction, but not one which falls with center-of-mass velocity $sensuremath{propto}1/v$ or steeper." @default.
• W2029043749 created "2016-06-24" @default.
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• W2029043749 date "2002-05-28" @default.
• W2029043749 modified "2023-09-30" @default.
• W2029043749 title "Constraining strong baryon–dark-matter interactions with primordial nucleosynthesis and cosmic rays" @default.
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• W2029043749 doi "https://doi.org/10.1103/physrevd.65.123503" @default.
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