The quark content of a certain meson is $\left(d\overline{s}\right)$. Determine whether it can be its own anti-particle.

Determine whether the following reaction conserve or violates strangeness. (use ${\mathrm{\pi }}^{\circ } \mathrm{d}\overline{\mathrm{d}}, {\mathrm{K}}^{+}=\mathrm{u}\overline{\mathrm{s}}, {\mathrm{\Lambda }}^{\circ }=\mathrm{uds},{\mathrm{K}}^{\circ }=\mathrm{d}\overline{\mathrm{s}}, {\mathrm{\Sigma }}^{-}=\mathrm{dds}$)

${\mathrm{\pi }}^{-}+{\mathrm{p}}^{+}\to {\mathrm{K}}^0+{\mathrm{\Lambda }}^0$

Determine whether the following reaction conserve or violates strangeness. (use ${\mathrm{\pi }}^{\circ } \mathrm{d}\overline{\mathrm{d}}, {\mathrm{K}}^{+}=\mathrm{u}\overline{\mathrm{s}}, {\mathrm{\Lambda }}^{\circ }=\mathrm{uds},{\mathrm{K}}^{\circ }=\mathrm{d}\overline{\mathrm{s}}, {\mathrm{\Sigma }}^{-}=\mathrm{dds}$)

$p^0+n\to K^{+}+{\Sigma }^{-}$

Determine whether the following reaction conserve or violates strangeness. (use ${\mathrm{\pi }}^{\circ } \mathrm{d}\overline{\mathrm{d}}, {\mathrm{K}}^{+}=\mathrm{u}\overline{\mathrm{s}}, {\mathrm{\Lambda }}^{\circ }=\mathrm{uds},{\mathrm{K}}^{\circ }=\mathrm{d}\overline{\mathrm{s}}, {\mathrm{\Sigma }}^{-}=\mathrm{dds}$)

$K^0\to {\mathrm{\pi }}^{-}+{\mathrm{\pi }}^{+}$

Determine whether the following reaction conserve or violates strangeness. (use ${\mathrm{\pi }}^{\circ } \mathrm{d}\overline{\mathrm{d}}, {\mathrm{K}}^{+}=\mathrm{u}\overline{\mathrm{s}}, {\mathrm{\Lambda }}^{\circ }=\mathrm{uds},{\mathrm{K}}^{\circ }=\mathrm{d}\overline{\mathrm{s}}, {\mathrm{\Sigma }}^{-}=\mathrm{dds}$)

${\mathrm{\pi }}^{-}+{\mathrm{p}}^{+}\to {\mathrm{\pi }}^{-}+{\mathrm{\Sigma }}^{+}$

In the reaction given below, neutrinos appear(denoted v). Identify the correct neutrino ($v_e,v_{\mu },v_{\tau }$ or the anti-particles of these).

${\mathrm{\pi }}^{+}\to {\mathrm{p}}^0+{\mathrm{e}}^{+}+\mathrm{v}$

In the reaction given below, neutrinos appear(denoted v). Identify the correct neutrino ($v_e,v_{\mu },v_{\tau }$ or the anti-particles of these).

${\mathrm{\pi }}^{+}\to {\mathrm{p}}^0+{\mathrm{\mu }}^{+}+\mathrm{v}$