Histories and Models of Dark Matter - Neal Weiner

[@keybutnolock]

Models of DM 07:52 Axions 09:42 Neutralinos 12:21 Sneutrinos 15:05 Sterile Neutrinos 18:16 L Tops 19:17 KK DM 22:30 Axinos 24:09 Gravitinos 27:14 Asymmetric DM 30:20 Hidden Sector DM Models 31:39 Black Holes 37:01 Wimpless DM 38:06 SIDM 41:00 Superfluid DM 49:29 DM at the Weak Scale 57:20 How was DM formed You love Physics, you love DM ; you love Neil Weiner ! 01:16:56 The Wimp miricle : )

[@SassePhoto]

@@legendarylightyagamiimmanu1821 You have no clue, your opinion has no value

[@Jason-gt2kx]

My hypothesis that Dark Matter is not a WIMP, but maybe is a deformation of space-time by which the curvature of space-time ALONE is the cause of the gravitational effect. Gravity is the consequence of the curvature of space-time. It may be possible that the structure of space-time itself could be warped without the presence of mass. Space-time has been shown to react like a fabric by warping, twisting, and propagating independent of mass. These properties have been proven with observations of gravitational lensing, frame dragging, and now gravitational waves. Fabrics can be stretched, pressured, and/or heated to the point of deformation. Such extreme conditions were all present during inflation, so it is plausible that space-time’s elastic nature could have hit its yield point and permanently deformed. Therefore, if gravity is the consequence of the warping of space-time, and fabrics can be permanently deformed, then a deformation could create a gravitational effect independent of mass. Thus, the unidentified dark "matter" that seems to be so elusive to modern science may not be matter at all but merely warped deformities causing gravitational effects. DM could be a microscopic black hole with no mass at the center... Prediction: Spacetime's elastic property hits a yield point, so only that part of geodesic's "stretch marks" would remain after inflation stopped. These steep gravitational wells would not follow the inverse square law. I am looking for Theorists or Experimentalists to help me develop ways to test this hypothesis. Is there a way observationally to test it’s gravity does not follow the inverse square law?

[@jordanpalmer8054]

This theory sounds very close to the MOND theory (MOdified Newtonian Dynamics). This modifies the inverse square law as you proposed by saying at a large radius from a mass, the laws of gravity change. This beautifully explains velocity-rotation curves measured by Vera Ruben in the 70s. However, as nice as this sounds, it does not explain the bullet cluster which is one of the leading observational evidence for DM. I am not sure about your "stretch marks" theory, sounds like a nice idea, but again I can't see how it would explain the bullet cluster observations? I wouldn't imagine that space-time could obtain scars from inflation. Deformations in space-time are merely caused by massive objects, if one would remove this object (theoretically), I believe that the deformation would no longer be there no matter how 'violent' inflation was etc. This is definitely a great question to ask a theoretical cosmologist!

[@anneblankert2005]

@@jordanpalmer8054 The bullet cluser observation is indeed strong support for Dark Matter being some sort of actual matter. However, as far as I know, there is only one such example observation found and observations that might suggest counter-evidence supposedly also exist. Jason G hypothesis supposes a yield point where the fabric of spacetime remains stretched after being stretched beyond a certain point. I believe black holes are example objects where space time gets bent to the utmost point possible. There are black holes at the center of galaxies. These galaxies move through space. If the fabric of spacetime would leave scars after fluctuating beyond a certain point, then moving galaxies should leave trails of this effect when moving through space?

[@jordanpalmer8054]

Anne Blankert yes, I understood the hypothesis;however, something doesn’t quite sit right with me. I don’t see how it could explain the formations of galaxies and you would also expect the cracks to be static. We see galaxies move with the dark matter halos surrounding them; therefore, it can’t just be explained by these cracks, dark matter surely needs to be mobile, no? Or in other words, the gravitational lensing measurements are independent of galaxy positions, the extra mass moves with the luminous matter

[@SomeGuy-nr9id]

pretty speculative doesn't sound very mechanically workable at all and (a yield point) maybe violates some other laws.

[@SassePhoto]

Stop talking, start calculating and show why

[@prophetofevil]

10 to the negative 33 is not as low as can be recorded on this subject, there is NO low end?

[@silberlinie]

We can only admire the courage, dedication, commitment and passion of our modern magicians to the utmost. Think you'd be on the edge of the known world. You see when you turn around, the lightened and known way you have come. And in front of you, right where your toes are located, not only the deep darkness begins. Also, there is no sound in front of you and no cold or warmth can be felt. What can you do? You read the coffee grounds, study the burned bones of goats. And you write cryptic signs on a blackboard. You have to be sure of yourself and trust your intuition. Then you explore the next centimetres ahead of you. You keep going. What are you gonna see? Translated with www.DeepL.com/Translator