- #1
Gal Winer
- 4
- 0
hey,
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
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