Difference between revisions of "Down-quark"
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==Key Stage 5== | ==Key Stage 5== | ||
===Meaning=== | ===Meaning=== | ||
| − | + | A '''down-quark''' ('''d''') is a type of [[quark]] with a [[Electrical Charge|charge]] of <math>-\frac{1}{3}</math>. | |
===About Down-quarks=== | ===About Down-quarks=== | ||
| + | : The '''down-quark''' is denoted with a lower case '''d'''. | ||
: There are two '''down-quarks''' in a [[neutron]] and only one '''down-quark''' in a [[proton]]. | : There are two '''down-quarks''' in a [[neutron]] and only one '''down-quark''' in a [[proton]]. | ||
{| border="1" style="border-collapse:collapse" | {| border="1" style="border-collapse:collapse" | ||
| − | |||
| style="height:20px; width:120px; text-align:center;"|'''[[Quark]]''' | | style="height:20px; width:120px; text-align:center;"|'''[[Quark]]''' | ||
| style="height:20px; width:120px; text-align:center;"|[[Electrical Charge|'''Charge''']]/[[Elementary Charge|e]] | | style="height:20px; width:120px; text-align:center;"|[[Electrical Charge|'''Charge''']]/[[Elementary Charge|e]] | ||
| Line 16: | Line 16: | ||
| style="height:20px; width:120px; text-align:center;"| | | style="height:20px; width:120px; text-align:center;"| | ||
[[Down-quark]] | [[Down-quark]] | ||
| − | | style="height:20px; width:120px; text-align:center;"|<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;"| | ||
[[Antidown-quark]] | [[Antidown-quark]] | ||
| − | | style="height:20px; width:120px; text-align:center;"|<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> |
|} | |} | ||
Latest revision as of 07:58, 19 July 2019
Key Stage 5
Meaning
A down-quark (d) is a type of quark with a charge of \(-\frac{1}{3}\).
About Down-quarks
- The down-quark is denoted with a lower case d.
- There are two down-quarks in a neutron and only one down-quark in a proton.
| Quark | Charge/e | Strangeness | Baryon Number | Lepton Number |
| \(Q=-\frac{1}{3}\) | \(S=0\) | \(B=+\frac{1}{3}\) | \(L=0\) | |
| \(Q=+\frac{1}{3}\) | \(S=0\) | \(B=-\frac{1}{3}\) | \(L=0\) |