91Ó°ÊÓ

The K mesons and the ${\mathit{Âì}}^{\mathbf{0}}$and $\mathit{Î\pounds }$hyperons are called the strange particles.

Strangeness is conserved in strong interactions, but it can change by 0 or 1.

Table representing strangeness quantum number of strange particles:

a)

${\mathbf{K}}^{+}→{\mathrm{μ}}^{+}+{\mathrm{ν}}_{\mathrm{μ}}$

The strangeness of each side is:

For LHS =$+1$

And

for RHS$=0$

Since both sides are not equal, therefore, the reaction is not strangeness conserved.

b)

$n+K^{+}→p+{\mathrm{π}}^0$

The strangeness of each side is:

For LHS $=+1$

And

for RHS $=0$

Since both sides are not equal, therefore, the reaction is not strangeness conserved.

c)

$K^{+}+K^{-}→{\mathrm{π}}^0+{\mathrm{π}}^0$

The strangeness of each side is:

For LHS $=0$

And

for RHS $=0$

Since both sides are equal, therefore, the reaction is strangeness conserved.

d)

$p+K^{-}→{\mathrm{Âì}}^0+{\mathrm{Ï€}}^0$

The strangeness of each side is:

For LHS $=-1$

And

for RHS $=-1$

Since both sides are equal, therefore, the reaction is strangeness conserved.

Hence, the reactions $\left(c\right),\left(d\right)$are strangeness conserved.