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latex:feynman [2022/12/20 18:12] – [Proton-proton collisions with a hard process] iwn | latex:feynman [2023/06/06 18:16] (current) – [Simple example: electron - muon scattering] iwn | ||
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* [[https:// | * [[https:// | ||
* [[http:// | * [[http:// | ||
+ | * [[https:// | ||
* [[latex: | * [[latex: | ||
* [[latex: | * [[latex: | ||
Line 61: | Line 62: | ||
Checkout the [[http:// | Checkout the [[http:// | ||
- | <WRAP group>< | + | <WRAP group>< |
- | **Table 1**: Available line styles | + | \\ \\ \\ \\ |
- | {{ latex: | + | **Table 1**: Available line styles |
- | </ | + | {{ latex: |
- | **Table 2**: Available line options | + | </ |
- | {{ latex: | + | **Table 2**: Available style parameters for '' |
+ | {{ latex: | ||
+ | \\ | ||
+ | **Table 3**: Available line options | ||
+ | {{ latex: | ||
\\ | \\ | ||
- | **Table | + | **Table |
- | {{ latex: | + | {{ latex: |
</ | </ | ||
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Some Feynman diagrams contributing to top quark pair production via gluon-gluon fusion: | Some Feynman diagrams contributing to top quark pair production via gluon-gluon fusion: | ||
+ | |||
+ | Full code for a {{latex: | ||
<WRAP group>< | <WRAP group>< | ||
Line 537: | Line 544: | ||
\fmfleft{i2, | \fmfleft{i2, | ||
\fmfright{o2, | \fmfright{o2, | ||
+ | % main | ||
+ | \fmf{fermion}{i1, | ||
\fmf{fermion}{o2, | \fmf{fermion}{o2, | ||
- | | + | \fmf{gluon, |
- | | + | % labels |
- | \fmflabel{$g$}{i1} | + | \fmflabel{$q$}{i1} |
- | \fmflabel{$g$}{i2} | + | \fmflabel{$\overline{q}$}{i2} |
\fmflabel{$\overline{\text{t}}$}{o2} | \fmflabel{$\overline{\text{t}}$}{o2} | ||
\fmflabel{t}{o1} | \fmflabel{t}{o1} | ||
Line 549: | Line 558: | ||
</ | </ | ||
\\ | \\ | ||
- | {{ latex:ggttbar1.png ? 220 }} | + | {{ latex:feynman: |
\\ | \\ | ||
</ | </ | ||
Line 557: | Line 566: | ||
\begin{fmffile}{feyngraph} | \begin{fmffile}{feyngraph} | ||
\begin{fmfgraph*}(110, | \begin{fmfgraph*}(110, | ||
- | \fmfleft{i2, | + | \fmfleft{i2, |
- | \fmfright{o2, | + | \fmfright{o2, |
- | \fmf{gluon}{v1,i1} | + | \fmfshift{2 left}{i1} |
- | \fmf{fermion}{v1,o1} | + | \fmf{fermion}{o2,v2,o1} |
- | \fmf{gluon}{i2,v2} | + | \fmf{gluon}{v1,i1} |
- | \fmf{fermion}{o2,v2} | + | \fmf{gluon}{v1,i2} |
- | \fmf{fermion,label=t}{v2,v1} | + | \fmf{gluon,label=$g$}{v1,v2} |
- | \fmflabel{$g$}{i2} | + | % labels |
- | \fmflabel{$g$}{i1} | + | \fmfv{l.d=4,l=$g$}{i1} |
+ | \fmfv{l.d=6,l=$g$}{i2} | ||
+ | \fmflabel{$\overline{\text{t}}$}{o2} | ||
\fmflabel{t}{o1} | \fmflabel{t}{o1} | ||
- | \fmflabel{$\overline{\text{t}}$}{o2} | ||
\end{fmfgraph*} | \end{fmfgraph*} | ||
\end{fmffile} | \end{fmffile} | ||
Line 573: | Line 583: | ||
</ | </ | ||
\\ | \\ | ||
- | {{ latex:ggttbar2.png ? 220 }} | + | {{ latex:feynman: |
\\ | \\ | ||
</ | </ | ||
Line 583: | Line 593: | ||
\fmfleft{i2, | \fmfleft{i2, | ||
\fmfright{o2, | \fmfright{o2, | ||
- | \fmf{fermion}{i1,v1,i2} | + | |
- | \fmf{fermion}{o2, | + | |
- | \fmf{gluon,label=$g$, | + | \fmf{fermion}{v1,o1} |
- | \fmflabel{$q$}{i1} | + | \fmf{gluon}{i2,v2} |
- | \fmflabel{$\overline{q}$}{i2} | + | \fmf{fermion}{o2, |
- | \fmflabel{$\overline{\text{t}}$}{o2} | + | \fmf{fermion,label=t}{v2,v1} |
- | \fmflabel{t}{o1} | + | % labels |
+ | \fmflabel{$g$}{i2} | ||
+ | \fmflabel{$g$}{i1} | ||
+ | | ||
+ | \fmfv{l.d=7, | ||
\end{fmfgraph*} | \end{fmfgraph*} | ||
\end{fmffile} | \end{fmffile} | ||
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</ | </ | ||
\\ | \\ | ||
- | {{ latex:qqttbar.png ? 220 }} | + | {{ latex:feynman: |
\\ | \\ | ||
</ | </ | ||
- | + | With radiated quarks or gluons that will form hard jets: | |
- | + | ||
- | With jets: | + | |
<WRAP group>< | <WRAP group>< | ||
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\large | \large | ||
\begin{fmffile}{feyngraph} | \begin{fmffile}{feyngraph} | ||
- | \begin{fmfgraph*}(125,75) | + | \begin{fmfgraph*}(120,70) |
\fmfleft{i2, | \fmfleft{i2, | ||
\fmfright{o2, | \fmfright{o2, | ||
\fmftop{t} | \fmftop{t} | ||
+ | \fmfshift{5 up}{t} | ||
+ | % skeleton | ||
\fmf{phantom}{i1, | \fmf{phantom}{i1, | ||
\fmf{phantom}{o1, | \fmf{phantom}{o1, | ||
\fmf{phantom}{v1, | \fmf{phantom}{v1, | ||
\fmffreeze | \fmffreeze | ||
- | | + | |
- | \fmfshift{5 up}{i1,t} | + | \fmf{fermion}{i1,g} |
- | \fmf{gluon,tension=0.8}{g,i1} | + | \fmf{plain,tension=2.8}{g,v1} |
- | \fmf{fermion}{v1, | + | \fmf{fermion}{v1, |
- | \fmf{gluon}{v1,i2} | + | \fmf{gluon, |
- | \fmf{fermion, | + | |
\fmf{gluon}{v1, | \fmf{gluon}{v1, | ||
\fmf{fermion}{o2, | \fmf{fermion}{o2, | ||
- | \fmflabel{$g$}{i1} | + | |
- | \fmflabel{$g$}{i2} | + | |
- | \fmflabel{$\overline{\text{t}}$}{o2} | + | \fmflabel{$\overline{q}$}{i2} |
- | \fmflabel{t}{o1} | + | \fmfv{l.d=5, |
+ | \fmflabel{$\bar{\text{t}}$}{o2} | ||
+ | \fmflabel{$\text{t}$}{o1} | ||
\end{fmfgraph*} | \end{fmfgraph*} | ||
\end{fmffile} | \end{fmffile} | ||
Line 632: | Line 647: | ||
</ | </ | ||
\\ \\ | \\ \\ | ||
- | {{ latex:ggttbar_quark.png ? 220 }} | + | {{ latex:feynman: |
\\ \\ | \\ \\ | ||
</ | </ | ||
- | |||
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\large | \large | ||
\begin{fmffile}{feyngraph} | \begin{fmffile}{feyngraph} | ||
- | \begin{fmfgraph*}(125,75) | + | \begin{fmfgraph*}(120,75) |
\fmfleft{i2, | \fmfleft{i2, | ||
\fmfright{o2, | \fmfright{o2, | ||
\fmftop{t} | \fmftop{t} | ||
+ | \fmfshift{4 left}{i1} | ||
+ | \fmfshift{2 left}{i2} | ||
+ | \fmfshift{5 up}{t} | ||
+ | % skeleton | ||
\fmf{phantom}{i1, | \fmf{phantom}{i1, | ||
\fmf{phantom}{o1, | \fmf{phantom}{o1, | ||
- | \fmf{phantom}{v1, | + | \fmf{phantom, |
\fmffreeze | \fmffreeze | ||
- | %\fmfshift{5 left}{i1} | + | % main |
- | %\fmfshift{5 up}{i1,t} | + | |
\fmf{gluon, | \fmf{gluon, | ||
\fmf{fermion}{v1, | \fmf{fermion}{v1, | ||
- | \fmf{fermion}{i2,v1} | + | \fmf{gluon}{v1,i2} |
\fmf{fermion, | \fmf{fermion, | ||
\fmf{gluon}{v1, | \fmf{gluon}{v1, | ||
\fmf{fermion}{o2, | \fmf{fermion}{o2, | ||
- | \fmflabel{$g$}{i1} | + | |
- | \fmflabel{$q$}{i2} | + | |
- | \fmflabel{$\overline{\text{t}}$}{o2} | + | \fmfv{l.d=6,l=$g$}{i2} |
- | \fmflabel{t}{o1} | + | \fmfv{l.d=5, |
+ | \fmflabel{$\bar{\text{t}}$}{o2} | ||
+ | \fmflabel{$\text{t}$}{o1} | ||
\end{fmfgraph*} | \end{fmfgraph*} | ||
\end{fmffile} | \end{fmffile} | ||
Line 667: | Line 686: | ||
</ | </ | ||
\\ \\ | \\ \\ | ||
- | {{ latex:gqttbar_quark.png ? 220 }} | + | {{ latex:feynman: |
\\ \\ | \\ \\ | ||
</ | </ | ||
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\large | \large | ||
\begin{fmffile}{feyngraph} | \begin{fmffile}{feyngraph} | ||
- | \begin{fmfgraph*}(120, | + | \begin{fmfgraph*}(120, |
\fmfleft{i2, | \fmfleft{i2, | ||
\fmfright{o2, | \fmfright{o2, | ||
\fmftop{t} | \fmftop{t} | ||
+ | \fmfshift{4 left}{i1} | ||
+ | \fmfshift{2 left}{i2} | ||
+ | \fmfshift{5 up}{t} | ||
+ | % skeleton | ||
\fmf{phantom}{i1, | \fmf{phantom}{i1, | ||
\fmf{phantom}{o1, | \fmf{phantom}{o1, | ||
- | \fmf{phantom}{v1, | + | \fmf{phantom, |
\fmffreeze | \fmffreeze | ||
- | | + | |
- | \fmf{plain,tension=2.8}{g,v1} | + | \fmf{gluon,tension=0.8}{g,i1} |
- | \fmf{fermion}{v1, | + | \fmf{fermion}{v1, |
- | \fmf{gluon, | + | \fmf{fermion}{i2,v1} |
+ | \fmf{fermion, | ||
\fmf{gluon}{v1, | \fmf{gluon}{v1, | ||
\fmf{fermion}{o2, | \fmf{fermion}{o2, | ||
- | \fmflabel{$q$}{i1} | + | |
- | \fmflabel{$\overline{q}$}{i2} | + | |
- | \fmflabel{$\overline{\text{t}}$}{o2} | + | \fmfv{l.d=6,l=$q$}{i2} |
- | \fmflabel{t}{o1} | + | |
+ | \fmflabel{$\bar{\text{t}}$}{o2} | ||
+ | \fmflabel{$\text{t}$}{o1} | ||
\end{fmfgraph*} | \end{fmfgraph*} | ||
\end{fmffile} | \end{fmffile} | ||
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</ | </ | ||
\\ \\ | \\ \\ | ||
- | {{ latex: | + | {{ latex:feynman: |
\\ \\ | \\ \\ | ||
</ | </ | ||
Line 3670: | Line 3696: | ||
Here are some proton-proton collisions with hard processes. Note the use of '' | Here are some proton-proton collisions with hard processes. Note the use of '' | ||
+ | |||
+ | Full code for a {{latex: | ||
A generic proces: | A generic proces: | ||
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Diffractive processes involving a Pomeron, after [[https:// | Diffractive processes involving a Pomeron, after [[https:// | ||
+ | |||
+ | Full code for a {{latex: | ||
Elastic scattering with Pomeron exchange: | Elastic scattering with Pomeron exchange: |