Kev txhais ntawm quark
Quark yog ib qho kev sib koom ua ke uas tau koom nrog kev sib cuam tshuam muaj zog thiab yog qhov tseem ceeb ntawm teeb meem. Cov quarks sib xyaw ua ke nrog cov sib txuam sib sau ua ke cov cov khoom sib xws hu ua hadron. Qhov feem ntau ruaj khov ntawm hadrons yog protons thiab neutrons, uas yog cov ntsuas uas ua lub nucleus. Vim muaj qhov tshwm sim hu ua" quark kaw", quarks tsis tuaj yeem pom ncaj qha los yog sib cais, thiab tsuas pom nyob hauv hadrons.