All Questions
Tagged with scattering standard-model
18
questions
-1
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0
answers
13
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Jet events and Deeep Inelastic Scattering (Scaling Behavior) at the same time?
I am a philosopher of physics, so I already apologize for potential ignorance. I have also graduated in physics, but I now analyze problems on another level and also forgot some of the mathematical ...
1
vote
0
answers
83
views
Doubt in $e^{+}e^{-}\rightarrow W^{+}W^{-}$ scattering
I am trying to understand how to compute the scattering amplitude for the process $e^{+}e^{-}\rightarrow W^{+}W^{-}$, as a reference one could look at Peskin chapter 21.
What I do not understand is ...
- 475
0
votes
0
answers
50
views
Amplitude of the process $q \bar q \rightarrow \tau^+ \tau^-H$
I want calculate the cross section of the process $q \bar q \rightarrow \tau^+ \tau^-H$, where the Higgs takes the $vev$. My question is: if the Higgs takes the $vev$ the amplitude of the process is ...
- 11
-1
votes
1
answer
123
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Integral on phase space
I'd like to integrate the square amplitude in the phase space( in $d^3k/(2\pi)^3 2E_k$ and $d^3k'/(2\pi)^3 2E_k$) where $p$ and $p'$ are the 4-momentum of the input particles, $k$ and $k'$ 4-momentum ...
- 11
4
votes
1
answer
117
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$γγh$ interaction in the Standard Model
The topology for the lowest order $γγh$ interaction in the Standard Model is given by
where we have an intermediate top quark loop. I am confused with the charge conservation at each vertex. Since ...
- 1,783
0
votes
1
answer
92
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What happens to protons AFTER deep inelastic scattering occurs?
As I understand in the deep inelastic scattering process, a collision of electron beams and protons occurs, resulting in a scattered electron. However, when the proton absorbs the virtual photon ...
- 625
2
votes
0
answers
60
views
Physicality of electroweak bosons
The energies achieved at modern particle accelerators are much higher than the all scales relevant to the electroweak unification. I was therefore wondering why what is measured at scattering ...
- 49
2
votes
1
answer
370
views
Energy and Momentum conservation in Bhabha scattering
I came across this question here which was asking my exact initial question (I even came from Griffiths problem 2.4 too!). But the given answer gave me a lot more questions which I think constitute ...
- 508
1
vote
1
answer
64
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Any details on deep inelastic scattering? [closed]
The article on Wikipedia is rather scanty and I couldn't find more info in previous questions. I hope you will cot consider this as a multiple question since all queries are details of a single issue.
...
- 691
1
vote
2
answers
30
views
Understanding Jet Clustering: Why is only $p_{T}$ used?
Let's only consider iterative jet clustering algorithms. Famous ones are the $k_{T}$ ($p = 1$), anti-$k_{T}$ ($p = -1$) and Cambridge/Aachen ($p = 0$) jet reconstruction algorithms.
All these ...
user248824
1
vote
1
answer
115
views
Scattering $u\bar{d} - c\bar{b}$
I'm trying to define if the scattering $u\bar{d} \rightarrow c\bar{b}$ is possible in any of the fundamental interactions, I know that in QCD (channel t) is allowed because of the charge conservation, ...
- 119
1
vote
1
answer
629
views
$u$-channel in Feynman diagrams
I have two questions regarding the $u$-channel in Feynman diagrams.
$\textbf{Question 1:}$ Suppose I have a $\gamma\gamma\to\bar{\nu}_{\mu}\nu_{\mu}.$ One of the diagrams will look as one of the ...
- 153
1
vote
1
answer
1k
views
Three Jet Events - Electron Positron Annihilation
In a three jet event, a high transverse momentum gluon is emitted before the hadronisation of quarks takes place. What is the intermediate process that the gluon undergoes before it hadronises?
I am ...
- 764
0
votes
4
answers
283
views
Ratio of partial widths for $\pi^- p \rightarrow \pi^0 n$ reaction
Reaction $$\pi^- p \rightarrow \pi^0 n$$ has a peak due to $\Delta$ resonance, which has a mass 1232 MeV and $\Gamma$ = 120 MeV. The partial widths are $\Gamma_i = 40$ MeV and $\Gamma_f = 80$ MeV. I ...
- 1,171
2
votes
1
answer
110
views
Evidence for standard model description of neutrons
as I don't know too much about experiments I have the following question concerning the evidence about the quark constituents in neutrons.
After a quick google investigation I found some sentences ...
- 21