Do particles in the universe exchange gravitons with each other?

  • Context: Undergrad 
  • Thread starter Thread starter Art Charbonneau
  • Start date Start date
  • Tags Tags
    Exchange Graviton
Click For Summary

Discussion Overview

The discussion revolves around the concept of whether particles in the universe, such as protons, neutrons, and dark matter particles, exchange gravitons with each other. It explores theoretical implications within the framework of quantum field theory and the status of gravitons as hypothetical particles.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions if all particles exchange gravitons with each other, seeking clarification on the nature of this interaction.
  • Another participant suggests that in a quantum field theory of gravity, particles do exchange gravitons, but emphasizes that gravitons should be understood as mathematical constructs rather than physical particles, highlighting the confusion surrounding virtual particles.
  • A different participant notes the lack of experimental evidence for gravitons, indicating that their existence remains uncertain.
  • One participant discusses the philosophical implications of gravitation and the role of elementary components in gravitational interactions, suggesting that the graviton hypothesis attempts to explain these interactions despite the absence of evidence.

Areas of Agreement / Disagreement

Participants express differing views on the existence and nature of gravitons, with some supporting the theoretical framework while others emphasize the lack of empirical evidence. The discussion remains unresolved regarding the actual existence of gravitons and their role in gravitational interactions.

Contextual Notes

The discussion touches on the limitations of current understanding, including the unresolved status of gravitons and the dependence on theoretical frameworks that may not yet be experimentally validated.

Art Charbonneau
Messages
1
Reaction score
0
Does each and every, say, proton, neutron and dark matter particle (DMP) exchange gravitons with each and every other proton, neutron and DMP in the universe?

(Sorry if this question has been posted to the wrong forum. Advice re correct forum would be appreciated.)

Art
 
Physics news on Phys.org
In the context of a quantum field theory of gravity, yes. But note that particles are not sending out gravitons to be capture and absorbed by other particles as if the gravitons where like little bullets. Virtual particles are a confusing concept and it may be better to think of them as mathematical constructs or artifacts instead of 'real' particles (i.e. something that exists outside of the math). However, there is considerable debate as to whether virtual particles actually exist or not.
 
  • Like
Likes   Reactions: slow
Note that gravitons haven't been discovered yet, so it's not known if they exist.
 
It is undeniable what Drakkith said. To say something else we need to enter into an epistemological field. Physics assumes that a body is the result of elementary components. Could a body participate in a phenomenon without its elementary components participating? Denying that we create many difficulties and resolve few, if any. The problem is to determine how the elementary components can participate. The weak force is associated with a type of events at elementary level that do not always happen, but gravity also works when they do not happen. The strong interaction has very short range. The electromagnetic interaction, in comparative terms, is much more intense than gravity. In what way can the elementary components participate in gravitation? The graviton hypothesis is an attempt to answer the question. The good thing about this hypothesis is to stay within what historically has given good results, that is, to formulate the macroscopic behavior as a result of elementary phenomena. The bad has been pointed out by Drakkith, that is, no experimental evidence of the graviton has been found.
 

Similar threads

  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 4 ·
Replies
4
Views
5K
  • · Replies 12 ·
Replies
12
Views
5K
  • · Replies 17 ·
Replies
17
Views
3K
  • · Replies 9 ·
Replies
9
Views
5K
  • · Replies 8 ·
Replies
8
Views
3K
  • · Replies 6 ·
Replies
6
Views
4K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K