diff --git a/standard_model.md b/standard_model.md
index 607b7b655a4..7f5fe74e0ce 100644
--- a/standard_model.md
+++ b/standard_model.md
@@ -2,6 +2,7 @@ The Standard Model of Particle Physics
 
 | Particle Name | Symbol | Spin | Charge | Mass [GeV/c<sup>2</sup>] |
 | ------------- | ------ | ---- | ------ | ------------------------ |
+| giton         | G      | 2    |  0     | 750
 | electron      | e      | 1/2  | -1     | 0.000511                 |
 | muon          | μ      | 1/2  | -1     | 0.1057                   |
 | tau           | τ      | 1/2  | -1     | 1.777                    |