Particles that contain a strange quark (such as the K- and the Λ0) have a strangeness of -1Particles that contain a strange antiquark (such as the K+) have a strangeness of +1Kaons were first called V particles because they formed V tracks in cloud chambers.The V tracks decayed into pions only (kaons)or into pions and protons (e.g. Σ particles). They decay through the weak interactionStrangeness is not conserved in a weak interaction.
Strangeness can be unchanged or changed by ±1 in a weak interaction. Strange particles are created in twos. Those that decay into pions are called kaons.Others decay in sequence or directly to protons and pions.The others such as the Σ particle have different rest masses which are always greater than a proton's rest mass.Strangeness is always conserved in strong interactions. Strangeness can change by 0, +1 or -1 in weak interactions.
Strangeness can be unchanged or changed by ±1 in a weak interaction. Strange particles are created in twos. Those that decay into pions are called kaons.Others decay in sequence or directly to protons and pions.The others such as the Σ particle have different rest masses which are always greater than a proton's rest mass.Strangeness is always conserved in strong interactions. Strangeness can change by 0, +1 or -1 in weak interactions.