A model of the basic particles and forces featuring six quarks, three charged leptons, three massless neutral leptons and four fundamental force carrying bosons. The twelve fermions are arranged into three generations, while the bosons serve to explain the electromagnetic interaction plus the strong ...
1
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2answers
177 views
What is the expectation value of the number operator when the vacuum has a VEV?
The number operator N applied to a field whose vacuum has zero VEV gives $N|0>=0$. What if we apply it to the Higgs field?
The background of this question is that in popular scientific accounts, ...
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1answer
99 views
Why does the running of the gauge couplings show $\frac{1}{\alpha}$ > $\frac{1}{\alpha_w}$ at low energy?
I thought the coupling constants were something like:
$\alpha \approx 1/137$
$\alpha_w \approx 10^{-6}$
$\alpha_s \approx 1$
And yet if you look at any pictorial representation of the running of ...
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2answers
297 views
Gravity and the Standard Model
Gravity is ignored in the SM. The proton rest mass is ~0.938 GeV/$c^2$. LHC protons will move with 7 TeV energy, presumably with a relativistic mass about 7,450 times rest mass. A cosmic ray with the ...
1
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1answer
116 views
Lepton masses in the Standard Model
Some simple questions regarding leptonic masses in the Standard Model (SM):
Why there is not an explicit mass term in addition to the effective mass term that arises from the Yukawa terms after ...
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1answer
286 views
Quark Radius Upper Bound
If quarks had internal structure (contradicting current beliefs), what is the lowest
upper bound on their "radius" based on current experimental results?
If possible, I'd prefer to only consider ...
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2answers
249 views
Is there a relationship between Berry-Pancharatnam phase and CP violation in quark mixing?
Berry-Pancharatnam phase is the phase that quantum systems exhibit when they pass through a sequence of states and return to their original state. It's a complex phase and it is different from the ...
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1answer
73 views
How to find the Higgs coupling with a mixing matrix?
It is known that the couplings to the Higgs are proportional to the mass for fermions;
$$g_{hff}=\frac{M_f}{v}$$
where $v$ is the VEV of the Higgs field. I'm trying to figure out why this is true ...
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0answers
91 views
Mirror Matter Hypothesis?
What is the current state of the hypothesis of mirror matter today?
Are there any experimental data or theoretical arguments that exclude it by now, or is it still considered viable among physicists?
...
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0answers
50 views
Is there mathematical proof of the vectorial character of the strong and em forces?
In a old paper,
http://arxiv.org/abs/hep-th/9509163
Becca Asquith argues that it is possible to prove that if the SU(2)xU(1) sector of the standard model is chiral, then the SU(3)xU(1) sector is ...
1
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1answer
236 views
Why are all observable gauge theories not vector-like?
Why are all observable gauge theories not vector-like?
Will this imply that the electron and/or fermions do not have mass?
How is this issue resolved?
Background:
The Standard Model is a ...
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0answers
99 views
What are the prerequisites to study CP violation?
If one would like to study CP violation, what would be the prerequisites for it?
For example, until now I have not studied quantum field theory and have done very little classical field theory, but ...
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1answer
63 views
Fine tuning and parametric modelings
When I perform parametric modeling, if there is significant multicollinearity between variables I think should be independent, but in fact are not, I run into the case where one or more of the ...
0
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1answer
248 views
What really is the future about the Standard Model
The fact that the bosons of the weak force have mass is something that I think technically poses many problems.
To avoid this and other problems with the masses of the particles devised a mechanism ...
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2answers
83 views
The status of $SU(3)_C$ symmetry in the Standard Model
In the Standard Model of Particle physics the $SU(2)_{EW}$ symmetry and the $SU(2)$ isospin symmetry are broken. What about $SU(3)_C$? Is it broken too?
if YES, what breaks the symmetry?
If NO, what ...
0
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1answer
133 views
“Conceptualizing” neutrinos
Layman here. EE and BS physics. I am "content" in viewing photons/electromagnetic radiation as an "emergent" property of spacetime? due to the electrons ("particles..?") and all their activity jumping ...
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1answer
260 views
What is the relationship between the Higgs field and quarks?
I have some difficulty considering the relative size of each and the meaning behind the shape of Higgs boson. I ask relating to the structures of both the Higgs field and quarks. How is it that the ...
0
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1answer
56 views
Does it happen at high energies (heavier leptons decay)?
A lepton is an elementary particle. The best known of all leptons is the electron which governs nearly all of chemistry as it is found in atoms and is directly tied to all chemical properties.
The ...
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3answers
158 views
The Role of Gravity among the Fundamental Forces of Nature
If we look at the standard model, we have 4 fundamental forces which include
Gravity,
Electromagnetism,
Nuclear weak force,
Nuclear strong force.
I would like to look at Gravity for a minute. ...
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1answer
117 views
why drag cause mass in higgs field ? how could drag cause mass?
why in higgs field drag cause mass?
drag is force in general not mass
Higgs field- Inquiring Minds - Questions About Physics
how drag of higgs field cause mass?
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1answer
56 views
What mechanism produced the baryon excess in the universe?
A baryon is a composite subatomic particle made up of three quarks (as distinct from mesons, which comprise one quark and one antiquark). Baryons and mesons belong to the hadron family, which are the ...
0
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1answer
152 views
How to calculate Rest Mass practically with Standard Model?
With relativistic physics, we can apply force to see resistance against acceleration. It'd give us relativistic mass and we have well established formula to get to the Rest Mass as long as we know the ...
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1answer
75 views
Future of colliders and technical limitations
Are there any technical limitations (theoretical or technological) that prevent quark based colliders? ie. Colliding two quarks together.
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1answer
200 views
How is fine tuning of standard model conceptual different than the fine tuning of PI?
If I were to try to find pi using a ruler and a compass, I would first try to find out how many rational line segments of the diameter I could fit around the interior circumference and then continue ...
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0answers
98 views
Weak isospin and types of weak charge
My understanding is that QCD has three color charges that are conserved as a result of global SU(3) invariance. What about SU(2) weak? Does it have two types of charges? What I'm getting at is:
U(1) ...
0
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0answers
62 views
Pareto efficiency and Standard Model parameters
Pareto Efficiency is a well understood concept in economics, which basically is a condition where no one actor could be made better off without some one being made worse off. This condition allows ...
0
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0answers
17 views
Hamiltonian of the charged current in SM (related to the lorentz invariance)
recently when I was studying the scatterings which involves a vector boson (like W boson) as an intermediate particle, I saw that the propagator is not Lorentz invariant, I read that there is another ...
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0answers
115 views
Electroweak Symmetry Breaking
Electroweak symmetry breaking is manifested by the nonzero masses of the weak W and Z bosons, and requires the existence of a Higgs boson or some other yet unseen mechanism. To solve the problem of ...
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0answers
95 views
What would the universe be like if Electroweak symmetry were unbroken? [duplicate]
Possible Duplicate:
What happens to matter in a standard model with zero Higgs VEV?
What if the Higgs did not have a "Mexican hat" potential and the therefore it's vacuum expectation value ...
0
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0answers
50 views
Which higgless models still predict a higgs-like resonance below the TeV scale? [closed]
Given today's announcement, I assume a bunch of wikipedia pages will need editing! The question is, which ones? Which higgless models still predict a resonance similar to the one observed by the ATLAS ...
0
votes
0answers
83 views
Masses of all the particles in the Standard Theory [duplicate]
Possible Duplicate:
If photons have no mass, how can they have momentum?
I'm sure this question has been asked here before but I wasn't able to find it clearly answered in one q/a session. ...
0
votes
0answers
187 views
Does the Standard model allow for radioactive decay prediction? [duplicate]
Possible Duplicate:
Predicting Decay Rates via the Standard Model
More specifically, does (any) current theory allow for approximate or exact predictions of atomic decay rates and types ...
0
votes
2answers
392 views
Can photons and gluons be holes in an aether?
Consider photons and gluons have 0 mass and 0 charge. In many respects they're already understood as the absence of a particle by mathematical models. Couldn't this be interpreted to mean they ...
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1answer
109 views
How quarks converted into leptons
Since the charged pions decay into two particles, a muon and a muon neutrino, seems quarks disappeared!,
The decay proceeds by the weak interaction $W^{+}$ and can be visualized in terms of Feynman ...
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1answer
169 views
How to verify a standard model correct or not? [closed]
How to verify a standard model correct or not?
which data can be applied to standard model to see its effect, and where can find these data?
could you demonstrate how to apply it
-3
votes
2answers
234 views
why is dark matter the best theory available to explain missing mass problems?
Why is dark matter the best theory to explain the missing mass problem?
Why is dark matter mathematically necessary to explain the missing mass problem?
On a side not I believe dark matter is ...
-4
votes
1answer
153 views
Why did Standard Model never sense a requirement to include gravitational quantum?
Standard Model is advanced version of Quantum physics. It tried to include everything which came in the way while understanding quantum world. It even didn't bother to include even Higgs Boson which ...
-4
votes
1answer
227 views
Pion Decay and Fractional electric Charge disappeared, why?
Since the charged pions decay into two particles, a muon and a muon neutrino Fractional electric Charge disappeared, why?
The decay proceeds by the weak interaction $W^{+}$ and can be visualized in ...
-6
votes
2answers
243 views
Cramer's rule, Origin of Quarks Fractional electric charge? [closed]
In linear algebra, Cramer's rule is an explicit formula for the solution of a system of linear equations with as many equations as unknowns.
2u+1d=1
1u+2d=0
$$a_1d+b_1u=c_1$$ $$a_2d+b_2u=c_2$$ ...
-7
votes
2answers
427 views
Could the fractional model of Quarks electric charge turn out to be false? [closed]
The delta baryons (also called delta resonances) are a family of subatomic hadron particles which have the symbols $\Delta^{++}$, $\Delta^{+}$, $\Delta^{0}$, and $\Delta^{−}$ and electric charges +2, ...
