All Questions
Tagged with standard-model photons
40
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Why does the up and anti-up quark combine into a pion and not a photon?
im currently studying a level particle physics and im confused about this. Particle annihilation occours when a particle meets its corresponding particle, converting their mass energy into two photons,...
- 3
1
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1
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55
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Is it possible for photons to gain mass and interact with the higgs field? [closed]
If objects gain mass as they approach the speed of light, is it possible that as a photon "attempts" to exceed the speed of light it gains enough mass to interact with the higgs field ...
- 31
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5
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119
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Annihilation radiation
Can photons of microwave wavelengths be emitted from electron-positron annihilation? If not, which processes, preferably other annihilations or particle collisions, produce microwave photons?
- 13
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Energy distribution of photon from neutral pion ($\pi^0$) decay
The laboratory-frame energy $E_\gamma$ of either photon is uniformly distributed between $E_{min} = \frac{1}{2}E_{\pi}(1-\beta)$ and $E_{max} = \frac{1}{2}E_{\pi}(1+\beta)$, where $E_\pi$ is the ...
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3
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Do gluons interact via virtual photons?
On a video on Youtube, I commented how a PBS Space Time episode helped me understand the speed of light by calling it the speed of causality. In response, I received the following comment:
"Let'...
- 1,666
5
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4
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668
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Why are gluons color charged but not photon? Could there be a charged EM force carriers like gluons or neutral color charge carrier like photon?
Gluons have a color charge why don't photons have an electric charge like gluons?
-4
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1
answer
290
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Is sub-atomic particles (quarks) bunch of compressed photons? [closed]
According to theoretical physics,protons,neutrons and electrons are made up of sub particles called quarks which are the building block of matter (baryons). what if the quarks are bunch of compressed ...
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28
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2
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Why are real photons so much less efficient in carrying momentum than virtual photons?
When two like magnetic poles are brought together, there's a repulsive force felt that's inversely proportional to their separation. In the standard model, the answer to "What is transmitting ...
- 1,563
3
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$n+n \rightarrow n+n$ scattering through photon interaction (QED Process)
If I think about the quark level process then, two u quarks can scatter through photon exchange via QED interaction by following tree-level process
.
This is happening because u quark is electrically ...
17
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3
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If the Higgs field gives particles mass, and is present everywhere, then why are there massless particles?
According to this article:
Imagine that all of space is uniformly filled with an invisible substance—now called the Higgs field—that exerts a drag force on particles when they accelerate through it. ...
- 338
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3
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Momentum conservation when virtual photon decay into lepton pair
I know the fact that one photon can not decay into electron-positron pair.
at the CM frame, the momentum of electron + positron is zero. However, the momentum of a photon can not be zero.
Though, I ...
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67
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Is there some quantitative measurement or concept that can distinguish between a photon and a gluon?
Considering both photons and gluons have a mass of 0, a charge of 0, and a spin of 1, what distinguishes them? I want to exclude answers such as 'they influence different forces (i.e. photons are ...
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2
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395
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Was photon *defined* according to Standard Model *before* electroweak symmetry breaking ? Or were there only $W_3$ and $B$?
Was photon defined according to Standard Model theory before electroweak symmetry breaking ? Or were there only $W_3$ and $B$ ?
Indeed, in
Electroweak to Electro/Weak Bosons?
Aman pawar answers "no" ...
0
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2
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686
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Upper limit on electron radius vs photon radius
Both electrons and photons are defined in the SM as point-like particles. The electron does have rest mass while the photon is massless.
Now if I search for the upper limit on the size of the ...
- 29k
1
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Why do photons and gluons not interact with the Higgs field? [duplicate]
I'm looking for a non-mathematic answer as I am yet to begin studying physics or calculus, still half a year away. Just a simple explanation in layman's terms.
As i understood it, electrons for ...
