Where would such a significant likelihood come from?Buzz Bloom said:Therefore one can conclude that no LSPs were found, and that there is a significant likelihood that they do not exist as a kind of DM.
mfb said:Where would such a significant likelihood come from?
The exclusion limits keep improving, but you can always reduce couplings to make the particles invisible to current experiments.
lhc is based on finding missing energy. none found.mfb said:My post applies to both LHC and direct dark matter searches like XENON.
I would think that if dark matter isn't found then perhaps we should be tweaking Newton's laws; I mean besides MOND which is only modifying Newton's laws, perhaps a serious shakeup in the fundamentals of physics is due.kodama said:Large Underground Xenon dark matter experiment and LHC have reported a null result on searches for dark matter, with new bounds.
What are the implication of these new bounds on neutralinos and LSP?
Missing energy is one part of the signature of possible dark matter-like particles, but the searches are more complex than that.kodama said:lhc is based on finding missing energy. none found.
Every new theory has to satify constraints from thousands of measurements. That is a huge challenge. If you just start making up hypotheses, they will fail to agree with many of those experimental results.MathematicalPhysicist said:I would think that if dark matter isn't found then perhaps we should be tweaking Newton's laws; I mean besides MOND which is only modifying Newton's laws, perhaps a serious shakeup in the fundamentals of physics is due.
mfb said:Missing energy is one part of the signature of possible dark matter-like particles, but the searches are more complex than that.
No dark matter found so far: sure. It would be impossible to miss such a discovery.Every new theory has to satify constraints from thousands of measurements. That is a huge challenge. If you just start making up hypotheses, they will fail to agree with many of those experimental results.
mfb said:Missing energy is one part of the signature of possible dark matter-like particles, but the searches are more complex than that.
No dark matter found so far: sure. It would be impossible to miss such a discovery.Every new theory has to satify constraints from thousands of measurements. That is a huge challenge. If you just start making up hypotheses, they will fail to agree with many of those experimental results.
Hi @mfb:mfb said:Where would such a significant likelihood come from?
mfb said:Well, something particle-like is quite likely based on cosmological observations, but it does not have to be a supersymmetric particle, sure. Supersymmetry does not have to exist at all.
how adjustable is the coupling for neutralinos and other WIMPS?mfb said:In particle physics such a classification does not make sense. Both "waves" and "particles" are described with the same framework of quantum field theory.
are you HEP? i ask bc i wonder if ultra-light scalar field dark matter is perhaps the best theory, esp with current exclusion limits from LUX.mfb said:I'm not a theoretician, but in general the phase spaces are usually larger than the exclusion limits experiments can set.
The Large Underground Xenon (LUX) dark matter experiment is a scientific project designed to search for the elusive dark matter particles that are thought to make up the majority of the universe's mass. It uses a tank filled with liquid xenon to detect potential interactions with dark matter particles.
The LHC LSP neutrino refers to a type of neutrino particle that is predicted by some theories to be a component of dark matter. It is important because if it exists, it could help scientists better understand the nature of dark matter and its role in the universe.
The LUX experiment uses a tank filled with liquid xenon, which is a noble gas that is sensitive to interactions with dark matter particles. When a dark matter particle passes through the tank, it may collide with a xenon atom, producing a tiny flash of light that can be detected by sensitive instruments.
The LUX experiment and the Large Hadron Collider (LHC) are both scientific projects aimed at understanding the mysteries of the universe. However, they use different approaches - while the LUX experiment looks for direct interactions with dark matter particles, the LHC collides particles at high energies to study the fundamental building blocks of matter.
So far, the LUX experiment has not detected any dark matter particles. However, its sensitivity has improved our understanding of the properties of dark matter, ruling out certain models and narrowing down the possibilities for its composition. It has also set new limits on the interaction between dark matter particles and ordinary matter, providing valuable insights for future experiments.