All Questions
Tagged with particle-physics general-relativity
68
questions
0
votes
1
answer
262
views
What is the smallest amount of neutrinos needed to create a black hole? [duplicate]
Is there some smallest amount of neutrinos needed to create a black hole?
Note that this question is not at all the same as the question here If a 1kg mass was accelerated close to the speed of light ...
- 1,005
7
votes
3
answers
858
views
Can the Unruh effect be confirmed by the LHC?
Two short questions regarding the Unruh effect. There are related answers on this forum and on wikipedia, but I am looking for confirmation of my own intuitive assumptions, so a straightfoward yes or ...
user74893
4
votes
1
answer
594
views
Does accelerating generate gravitons?
If gravity and acceleration are indistinguishable, then does that mean converting potential energy to kinetic energy generates gravitons... but only temporarily until you stop accelerating?
- 463
0
votes
3
answers
372
views
Particles Associated With Gravitational Waves
I've been reading about linearized GR and the study of gravitational waves, and an odd thought popped into my head. According to wave-particle duality (admittedly, usually used in quantum mechanics!), ...
- 10.8k
2
votes
1
answer
643
views
Does a hydrogen atom today have same mass as a hydrogen atom in the future?
Does an atom of hydrogen today have the same rest mass energy as an atom of hydrogen a billion years in the future?
Standard cosmology seems to tacitly make this assumption.
But surely one can only ...
- 5,925
4
votes
1
answer
101
views
If non-zero cosmological constant interpreted as a repulsive field, what would be the properties of this field's quanta?
If non-zero cosmological constant interpreted as a repulsive field, what would be the properties of the excitation of such field, i.e. the particle which serves as the field's quantum?
What would be ...
- 11.2k
11
votes
1
answer
758
views
Justification for new theories of Particle Physics and General Relativity
In reference to arxiv:1212.4893v3 and arxiv:1206.5078v2 papers of Ma and Wang, they have proposed new theories in particle physics, the weakton model where quarks and leptons are formed using these ...
- 637
3
votes
1
answer
662
views
Metric Perturbations in General Relativity and quasi-normal modes?
I am familiar with the tools that appear in (linear) perturbation theory for general relativity, that is namely that one writes:
$$g_{\mu \nu} = g^{(0)}_{\mu \nu} + \epsilon g^{(1)}_{\mu \nu} + \...
- 1,525
4
votes
2
answers
2k
views
Space-time Topologies?
When it comes to questions of existence of bounds for PDE's and such, one must often make some assumptions regarding the topology of the space-time to use well known theorems.
My question is two-...
- 1,525
7
votes
2
answers
424
views
$L^{1}$ energy-momentum tensors in general relativity; semi-classical gravity
I was unsure whether to pose this question in a physics or mathematics forum, but it is an interesting idea I have been thinking about for some time.
In any (semi-)classical field theory it is often ...
- 1,525
2
votes
0
answers
152
views
gravitational field as a spin 2 particle using gauge invariance [closed]
can someone help me prove that a gravitational field corresponds to a spin 2 particle using gauge invariance.
i know about the tensor formulation of GTR and the gauge invariance in electrodynamics ...
0
votes
0
answers
466
views
Relativistic Black Hole? [duplicate]
So recently, looking at high energy particles through the lens of General and Special Relativity has peaked my interest. One thing I was considering, using the electron as the first example, is as ...
- 1,049
1
vote
0
answers
153
views
Mass is rigidity?
In General Relativity, a totally rigid body cannot be accelerated. It will behave like something of infinite mass.
Similarly a body of two separated particles which connected to each other with a ...
- 11.2k
3
votes
2
answers
1k
views
Matter and anti-matter collision energy problem
From Beyond Einstein, by Michio Kaku and Jennifer Thompson, Chapter 13, Antimatter :
Dirac, also focused on the fact that Einstein's equation $E=mc^2$ wasn't totally true. (Einstein was aware that ...
- 231
3
votes
2
answers
3k
views
Graviton and photons interaction
If one believes in the theory of gravitons then by viewing a black hole you see gravitons affect photons. This in turn leads to the conclusion that force carrier's mass equivalences allow them to be ...
- 141