hey,(adsbygoogle = window.adsbygoogle || []).push({});

i want to find the lowest order strong interaction feynman diagram for the following process:

[tex]\Sigma^{++}_c \rightarrow \Lambda^+_c \pi^+[/tex]

the quark composition is:

[tex] \Sigma^{++}_c = (c u u) \ \Lambda^+_c = (c u d). \pi^+ =( \bar{d} u ) [/tex]

an image of a correct process is attached .

my question is: why can't the C quark be the one emitting the gluon?

my initial thought was Isospin conservation, as C doesn't carry isospin and the [tex] d \bar{d}[/tex] pair may have a [tex] I = 1 [/tex]. but the pair may also have a [tex] I=0 [/tex].

thanks for any help

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Feynman diagram for a strong interaction decay

**Physics Forums | Science Articles, Homework Help, Discussion**