Particles in our universe undetectable by us

AI Thread Summary
The discussion explores the possibility of particles existing in our universe that have their own fundamental forces but do not interact with known particles or forces, rendering them undetectable. It raises questions about the nature of collisions and interactions between such particles, suggesting that if they do not recognize each other's mass or forces, traditional definitions of collision may not apply. The conversation shifts towards the philosophical implications of such undetectable particles, positing that their existence would essentially define a parallel universe coexisting in the same space. The concept challenges the boundaries between physics and philosophy, as proving the existence of these particles becomes impossible. Ultimately, the idea suggests a complex relationship between different forms of existence within the same universe.
ufarad
Messages
15
Reaction score
0
Is there any reason that there could not be particles in the same universe as us that had their own fundamental forces of strong nuclear, electroweak, and gravity equivalent to those we know and love but which did not affect our particles nor ours theirs all around us (i.e., totally undetectable by us but nevertheless right there in front of us)? At first, I was thinking that on the one hand since most of an atom is empty space, if two particles didn't exert any force on each other, the likelihood of collision would probably be very low, but then I thought to myself, what IS a collision if two particles don't even recognize each other's mass or fundamental forces at all?
 
Space news on Phys.org
If they are totally undetectable by us, and don't interact with our universe in any way, then there is no way to prove whether they even exist or not, and it becomes a question of philosophy and not one of physics.
 
My friend, that is why I posted this thought in the philosophy section.
 
Particles like that would... basically be the makings of another universe, much as a different weight for the proton would be. Different, but equivalent forces that have no interaction with our universe would be a decent definition of a parallel universe occupying the same space.
 

Thread 'Illuminating Black Hole Shadows with Dark Matter Annihilation'

Abstract The Event Horizon Telescope (EHT) has significantly advanced our ability to study black holes, achieving unprecedented spatial resolution and revealing horizon-scale structures. Notably, these observations feature a distinctive dark shadow—primarily arising from faint jet emissions—surrounded by a bright photon ring. Anticipated upgrades of the EHT promise substantial improvements in dynamic range, enabling deeper exploration of low-background regions, particularly the inner shadow...
View full post »

Similar threads

A Form of energy at time of big bang
Replies
11
Views
2K
I How does the Singularity produce all the diverse matter in the universe?
Replies
9
Views
2K
I Some questions about Cosmic Inflation
Replies
4
Views
4K
I Is it accurate to say work is motion against an opposing force?
2
Replies
75
Views
4K
B Questions regarding expansion, the vacuum in space, and black holes
Replies
6
Views
2K
I What will eventually happen to all EM waves / photons?
Replies
10
Views
2K
I Questions on the consequence of an evolving dark energy parameter
Replies
1
Views
1K
I Would Heat Death overcome Strong Nuclear Force?
Replies
12
Views
3K
I Collapse of particle wave function and single Universe wave function?
Replies
43
Views
5K
Gravity & Virtual Particles: Does it Increase Temperature/Radiation?
Replies
7
Views
3K

Hot Threads

Recent Insights

Back
Top