Difference between revisions of "Quark"
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| style="height:20px; width:120px; text-align:center;"|<math>q=+\frac{2}{3}</math> | | style="height:20px; width:120px; text-align:center;"|<math>q=+\frac{2}{3}</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | | style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | ||
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>B=+\frac{1}{3}</math> |
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>L=0</math> |
|- | |- | ||
| style="height:20px; width:120px; text-align:center;"| | | style="height:20px; width:120px; text-align:center;"| | ||
| Line 34: | Line 34: | ||
| style="height:20px; width:120px; text-align:center;"|<math>q=-\frac{1}{3}</math> | | style="height:20px; width:120px; text-align:center;"|<math>q=-\frac{1}{3}</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | | style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | ||
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>B=+\frac{1}{3}</math> |
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>L=0</math> |
|- | |- | ||
| style="height:20px; width:120px; text-align:center;"| | | style="height:20px; width:120px; text-align:center;"| | ||
| Line 41: | Line 41: | ||
| style="height:20px; width:120px; text-align:center;"|<math>q=-\frac{1}{3}</math> | | style="height:20px; width:120px; text-align:center;"|<math>q=-\frac{1}{3}</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>S=-1</math> | | style="height:20px; width:120px; text-align:center;"|<math>S=-1</math> | ||
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>B=+\frac{1}{3}</math> |
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>L=0</math> |
|- | |- | ||
| style="height:20px; width:120px; text-align:center;"| | | style="height:20px; width:120px; text-align:center;"| | ||
| Line 48: | Line 48: | ||
| style="height:20px; width:120px; text-align:center;"|<math>q=+\frac{2}{3}</math> | | style="height:20px; width:120px; text-align:center;"|<math>q=+\frac{2}{3}</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | | style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | ||
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>B=+\frac{1}{3}</math> |
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>L=0</math> |
|- | |- | ||
| style="height:20px; width:120px; text-align:center;"| | | style="height:20px; width:120px; text-align:center;"| | ||
| Line 55: | Line 55: | ||
| style="height:20px; width:120px; text-align:center;"|<math>q=-\frac{1}{3}</math> | | style="height:20px; width:120px; text-align:center;"|<math>q=-\frac{1}{3}</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | | style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | ||
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>B=+\frac{1}{3}</math> |
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>L=0</math> |
|- | |- | ||
| style="height:20px; width:120px; text-align:center;"| | | style="height:20px; width:120px; text-align:center;"| | ||
| Line 62: | Line 62: | ||
| style="height:20px; width:120px; text-align:center;"|<math>q=+\frac{2}{3}</math> | | style="height:20px; width:120px; text-align:center;"|<math>q=+\frac{2}{3}</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | | style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | ||
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>B=+\frac{1}{3}</math> |
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>L=0</math> |
|} | |} | ||
| Line 78: | Line 78: | ||
| style="height:20px; width:120px; text-align:center;"|<math>q=-\frac{2}{3}</math> | | style="height:20px; width:120px; text-align:center;"|<math>q=-\frac{2}{3}</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | | style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | ||
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>B=-\frac{1}{3}</math> |
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>L=0</math> |
|- | |- | ||
| style="height:20px; width:120px; text-align:center;"| | | style="height:20px; width:120px; text-align:center;"| | ||
| Line 85: | Line 85: | ||
| style="height:20px; width:120px; text-align:center;"|<math>q=+\frac{1}{3}</math> | | style="height:20px; width:120px; text-align:center;"|<math>q=+\frac{1}{3}</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | | style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | ||
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>B=-\frac{1}{3}</math> |
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>L=0</math> |
|- | |- | ||
| style="height:20px; width:120px; text-align:center;"| | | style="height:20px; width:120px; text-align:center;"| | ||
| Line 92: | Line 92: | ||
| style="height:20px; width:120px; text-align:center;"|<math>q=+\frac{1}{3}</math> | | style="height:20px; width:120px; text-align:center;"|<math>q=+\frac{1}{3}</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>S=+1</math> | | style="height:20px; width:120px; text-align:center;"|<math>S=+1</math> | ||
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>B=-\frac{1}{3}</math> |
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>L=0</math> |
|- | |- | ||
| style="height:20px; width:120px; text-align:center;"| | | style="height:20px; width:120px; text-align:center;"| | ||
| Line 99: | Line 99: | ||
| style="height:20px; width:120px; text-align:center;"|<math>q=-\frac{2}{3}</math> | | style="height:20px; width:120px; text-align:center;"|<math>q=-\frac{2}{3}</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | | style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | ||
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>B=-\frac{1}{3}</math> |
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>L=0</math> |
|- | |- | ||
| style="height:20px; width:120px; text-align:center;"| | | style="height:20px; width:120px; text-align:center;"| | ||
| Line 106: | Line 106: | ||
| style="height:20px; width:120px; text-align:center;"|<math>q=+\frac{1}{3}</math> | | style="height:20px; width:120px; text-align:center;"|<math>q=+\frac{1}{3}</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | | style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | ||
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>B=-\frac{1}{3}</math> |
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>L=0</math> |
|- | |- | ||
| style="height:20px; width:120px; text-align:center;"| | | style="height:20px; width:120px; text-align:center;"| | ||
| Line 113: | Line 113: | ||
| style="height:20px; width:120px; text-align:center;"|<math>q=-\frac{2}{3}</math> | | style="height:20px; width:120px; text-align:center;"|<math>q=-\frac{2}{3}</math> | ||
| style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | | style="height:20px; width:120px; text-align:center;"|<math>S=0</math> | ||
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>B=-\frac{1}{3}</math> |
| − | | style="height:20px; width:120px; text-align:center;"|<math> | + | | style="height:20px; width:120px; text-align:center;"|<math>L=0</math> |
|} | |} | ||
Revision as of 17:44, 18 July 2019
Key Stage 5
Meaning
Quarks (q) are a type of fermion and are the constituent parts of hadrons.
About Quarks
- Quarks are believed to be fundamental particles but they have never been observed on their own.
- Quarks always exist as part of hadron including a baryon, which is a triplet of quarks or a meson which is a quark-antiquark pair.
- There are 6 types of quark including:
- Up-quark (u) - With a charge of \(+\frac{2}{3}\)e, two of which are found in proton and one of which is found in a neutron.
- Down-quark (d) - With a charge of \(-\frac{1}{3}\)e, two of which are found in a neutron and one of which is found in a proton.
- Strange-quark (s) - With a charge of \(-\frac{1}{3}\)e which decays quickly via the weak interaction into a down-quark.
- Top-quark (t) - With a charge of \(+\frac{2}{3}\)e which decays quickly via the weak interaction.
- Bottom-quark (b) - With a charge of \(-\frac{1}{3}\)e which decays quickly via the weak interaction.
- Charm-quark (c) - With a charge of \(+\frac{2}{3}\)e which decays quickly via the weak interaction.
Conserved Quantities
| Quark | Charge/e | Strangeness | Baryon Number | Lepton Number |
| \(q=+\frac{2}{3}\) | \(S=0\) | \(B=+\frac{1}{3}\) | \(L=0\) | |
| \(q=-\frac{1}{3}\) | \(S=0\) | \(B=+\frac{1}{3}\) | \(L=0\) | |
| \(q=-\frac{1}{3}\) | \(S=-1\) | \(B=+\frac{1}{3}\) | \(L=0\) | |
| \(q=+\frac{2}{3}\) | \(S=0\) | \(B=+\frac{1}{3}\) | \(L=0\) | |
| \(q=-\frac{1}{3}\) | \(S=0\) | \(B=+\frac{1}{3}\) | \(L=0\) | |
| \(q=+\frac{2}{3}\) | \(S=0\) | \(B=+\frac{1}{3}\) | \(L=0\) |
| Antiquark | Charge/e | Strangeness | Baryon Number | Lepton Number |
| \(q=-\frac{2}{3}\) | \(S=0\) | \(B=-\frac{1}{3}\) | \(L=0\) | |
| \(q=+\frac{1}{3}\) | \(S=0\) | \(B=-\frac{1}{3}\) | \(L=0\) | |
| \(q=+\frac{1}{3}\) | \(S=+1\) | \(B=-\frac{1}{3}\) | \(L=0\) | |
| \(q=-\frac{2}{3}\) | \(S=0\) | \(B=-\frac{1}{3}\) | \(L=0\) | |
| \(q=+\frac{1}{3}\) | \(S=0\) | \(B=-\frac{1}{3}\) | \(L=0\) | |
| \(q=-\frac{2}{3}\) | \(S=0\) | \(B=-\frac{1}{3}\) | \(L=0\) |