The Feynman diagram shows the decay of a quark-anti-quark pair in a meson into two gluons. With might happen to the gluons produced in this decay.

Beta-minus decay involves the decay of a neutrino into a proton according to the reaction

$n\to p^{+}+e^{-}+{\overline{v}}_e$

Describe this decay in terms of quarks.

Beta-minus decay involves the decay of a neutron into a proton according to the reaction

$n\to p^{+}+e^{-}+\overline{v_e}$

Draw a Feynman diagram for the process.

Using the basic weak interaction vertex involving W boson and two quarks or leptons given in the figure below, draw Feynman diagram to represent the following process.

${\mu }^{-}\to e^{-}+{\overline{v}}_e+v_{\mu }$

Using the basic weak interaction vertex involving W boson and two quarks or leptons given in the figure below, draw a Feynman diagram to represent the following process.

$e^{-}+{\overline{v}}_e\to {\mu }^{-}+{\overline{v}}_e$

Using the basic weak interaction vertex involving W boson and two quarks or leptons given in the figure below, draw a Feynman diagram to represent the following process.

${\mathrm{\pi }}^{+}\to {\mathrm{\mu }}^{-}+{\mathrm{v}}_{\mathrm{\mu }}$

Using the basic weak interaction vertex involving W boson and two quarks or leptons given in the figure below, draw a Feynman diagram to represent the following process.

$K^{-}\to {\mu }^{-}+{\overline{v}}_{\mu }$