Difference between revisions of "Quark"
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===Conserved Quantities=== | ===Conserved Quantities=== | ||
{| border="1" style="border-collapse:collapse" | {| border="1" style="border-collapse:collapse" | ||
| − | | style="height:20px; width: | + | |+ Properties of the quarks. |
| − | | style="height:20px; width: | + | | style="height:20px; width:120px; text-align:center;"|'''[[Quark]]''' |
| − | | style="height:20px; width: | + | | style="height:20px; width:120px; text-align:center;"|[[Electrical Charge|'''Charge''']]/[[Elementary Charge|e]] |
| − | | style="height:20px; width: | + | | style="height:20px; width:120px; text-align:center;"|'''[[Strangeness]]''' |
| − | | style="height:20px; width: | + | | style="height:20px; width:120px; text-align:center;"|'''[[Conservation of Baryon Number|Baryon Number]]''' |
| − | + | | style="height:20px; width:120px; text-align:center;"|'''[[Conservation of Lepton Number|Lepton Number]]''' | |
|- | |- | ||
| − | | style="height:20px; width: | + | | style="height:20px; width:120px; text-align:center;"| |
[[Up-quark]] | [[Up-quark]] | ||
| − | | style="height:20px; width: | + | | 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: | + | | style="height:20px; width:120px; text-align:center;"|<math>b=+\frac{1}{3}</math> |
| − | | style="height:20px; width: | + | | style="height:20px; width:120px; text-align:center;"|<math>l=0</math> |
| − | | style="height:20px; width: | ||
|- | |- | ||
| − | | style="height:20px; width: | + | | style="height:20px; width:120px; text-align:center;"| |
[[Down-quark]] | [[Down-quark]] | ||
| − | | style="height:20px; width: | + | | 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: | + | | style="height:20px; width:120px; text-align:center;"|<math>b=+\frac{1}{3}</math> |
| − | | style="height:20px; width: | + | | style="height:20px; width:120px; text-align:center;"|<math>l=0</math> |
| − | | style="height:20px; width: | ||
|- | |- | ||
| − | | style="height:20px; width: | + | | style="height:20px; width:120px; text-align:center;"| |
[[Strange-quark]] | [[Strange-quark]] | ||
| − | | style="height:20px; width: | + | | 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>b=+\frac{1}{3}</math> | ||
| + | | style="height:20px; width:120px; text-align:center;"|<math>l=0</math> | ||
| + | |- | ||
| + | [[Top-quark]] | ||
| + | | 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>b=+\frac{1}{3}</math> | ||
| + | | style="height:20px; width:120px; text-align:center;"|<math>l=0</math> | ||
| + | |- | ||
| + | | style="height:20px; width:120px; text-align:center;"| | ||
| + | [[Bottom-quark]] | ||
| + | | 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>b=+\frac{1}{3}</math> | ||
| + | | style="height:20px; width:120px; text-align:center;"|<math>l=0</math> | ||
| + | |- | ||
| + | [[Charm-quark]] | ||
| + | | 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>b=+\frac{1}{3}</math> | ||
| + | | style="height:20px; width:120px; text-align:center;"|<math>l=0</math> | ||
| + | |} | ||
| − | | style="height:20px; width: | + | {| border="1" style="border-collapse:collapse" |
| − | | style="height:20px; width: | + | |+ Properties of the antiquarks. |
| − | | style="height:20px; width: | + | | style="height:20px; width:120px; text-align:center;"|'''[[Antiquark]]''' |
| + | | style="height:20px; width:120px; text-align:center;"|[[Electrical Charge|'''Charge''']]/[[Elementary Charge|e]] | ||
| + | | style="height:20px; width:120px; text-align:center;"|'''[[Strangeness]]''' | ||
| + | | style="height:20px; width:120px; text-align:center;"|'''[[Conservation of Baryon Number|Baryon Number]]''' | ||
| + | | style="height:20px; width:120px; text-align:center;"|'''[[Conservation of Lepton Number|Lepton Number]]''' | ||
| + | |- | ||
| + | | style="height:20px; width:120px; text-align:center;"| | ||
| + | [[Antiup-quark]] | ||
| + | | 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>b=-\frac{1}{3}</math> | ||
| + | | style="height:20px; width:120px; text-align:center;"|<math>l=0</math> | ||
| + | |- | ||
| + | | style="height:20px; width:120px; text-align:center;"| | ||
| + | [[Antidown-quark]] | ||
| + | | 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>b=-\frac{1}{3}</math> | ||
| + | | style="height:20px; width:120px; text-align:center;"|<math>l=0</math> | ||
| + | |- | ||
| + | | style="height:20px; width:120px; text-align:center;"| | ||
| + | [[Antistrange-quark]] | ||
| + | | 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>b=-\frac{1}{3}</math> | ||
| + | | style="height:20px; width:120px; text-align:center;"|<math>l=0</math> | ||
| + | |- | ||
| + | [[Antitop-quark]] | ||
| + | | 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>b=-\frac{1}{3}</math> | ||
| + | | style="height:20px; width:120px; text-align:center;"|<math>l=0</math> | ||
| + | |- | ||
| + | | style="height:20px; width:120px; text-align:center;"| | ||
| + | [[Antibottom-quark]] | ||
| + | | 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>b=-\frac{1}{3}</math> | ||
| + | | style="height:20px; width:120px; text-align:center;"|<math>l=0</math> | ||
| + | |- | ||
| + | [[Anticharm-quark]] | ||
| + | | 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>b=-\frac{1}{3}</math> | ||
| + | | style="height:20px; width:120px; text-align:center;"|<math>l=0</math> | ||
|} | |} | ||
Revision as of 15:36, 18 July 2019
Key Stage 5
Meaning
Quarks 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 - 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 - 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 - With a charge of \(-\frac{1}{3}\)e which decays quickly via the weak interaction into a down-quark.
- Top-quark - With a charge of \(+\frac{2}{3}\)e which decays quickly via the weak interaction.
- Bottom-quark - With a charge of \(-\frac{1}{3}\)e which decays quickly via the weak interaction.
- Charm-quark - With a charge of \(+\frac{2}{3}\)e which decays quickly via the weak interaction.
Conserved Quantities
Top-quarkCharm-quark| 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 |
| \(q=-\frac{2}{3}\) | \(S=0\) | \(b=-\frac{1}{3}\) | \(l=0\) | |
| \(q=+\frac{1}{3}\) | \(S=0\) | \(b=-\frac{1}{3}\) | \(l=0\) | |
| \(q=+\frac{1}{3}\) | \(S=+1\) | \(b=-\frac{1}{3}\) | \(l=0\) | |
| \(q=-\frac{2}{3}\) | \(S=0\) | \(b=-\frac{1}{3}\) | \(l=0\) | |
| \(q=+\frac{1}{3}\) | \(S=0\) | \(b=-\frac{1}{3}\) | \(l=0\) | |
| \(q=-\frac{2}{3}\) | \(S=0\) | \(b=-\frac{1}{3}\) | \(l=0\) |