Statements (27)
| Predicate | Object | 
|---|---|
| gptkbp:instanceOf | 
                                    
                                        
                                            gptkb:Dragon
                                        
                                         gptkb:Fermion gptkb:Particle  | 
                            
| gptkbp:antiparticle | 
                                    
                                        
                                            gptkb:anti-down_quark
                                        
                                         | 
                            
| gptkbp:color_charge | 
                                    
                                        
                                            
                                            yes
                                        
                                        
                                         | 
                            
| gptkbp:component | 
                                    
                                        
                                            gptkb:neutron
                                        
                                         gptkb:proton  | 
                            
| gptkbp:discoveredBy | 
                                    
                                        
                                            gptkb:Murray_Gell-Mann
                                        
                                         gptkb:George_Zweig  | 
                            
| gptkbp:discoveredIn | 
                                    
                                        
                                            
                                            1964
                                        
                                        
                                         | 
                            
| gptkbp:flavor | 
                                    
                                        
                                            
                                            down
                                        
                                        
                                         | 
                            
| gptkbp:generation | 
                                    
                                        
                                            
                                            first
                                        
                                        
                                         | 
                            
| gptkbp:is_a_constituent_of | 
                                    
                                        
                                            gptkb:baryons
                                        
                                         gptkb:hadrons gptkb:mesons  | 
                            
| gptkbp:mass | 
                                    
                                        
                                            
                                            ~4.7 MeV/c^2
                                        
                                        
                                         | 
                            
| gptkbp:participatedIn | 
                                    
                                        
                                            gptkb:weak_interaction
                                        
                                         electromagnetic interaction strong interaction gravitational interaction  | 
                            
| gptkbp:range | 
                                    
                                        
                                            
                                            -1/3 e
                                        
                                        
                                         | 
                            
| gptkbp:spin | 
                                    
                                        
                                            
                                            1/2
                                        
                                        
                                         | 
                            
| gptkbp:symbol | 
                                    
                                        
                                            
                                            d
                                        
                                        
                                         | 
                            
| gptkbp:symbol_in_Feynman_diagrams | 
                                    
                                        
                                            
                                            d
                                        
                                        
                                         | 
                            
| gptkbp:bfsParent | 
                                    
                                        
                                            gptkb:quarks
                                        
                                         | 
                            
| gptkbp:bfsLayer | 
                                    
                                        
                                            
                                            5
                                        
                                        
                                         | 
                            
| https://www.w3.org/2000/01/rdf-schema#label | 
                                    
                                        
                                            
                                            down quark
                                        
                                        
                                         |