- #1
K8181
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I just started a class in particle physics this semester, and I really need help on one of our first homework problems. We are supposed to show that while the following decays are allowed:
roe(+) --> pi(0)pi(+)
roe(-) --> pi(0)pi(-)
roe(0) --> pi(+)pi(-)
the following decay is not allowed:
roe(0) --> pi(0)pi(0)
I am pretty sure the reason is that it violates a conservation law, but I don't know which one. We have barely touched on what quantities are conserved in lecture. I can see that charge is conserved in all cases, so no problem there.
We are also told that the roe meson is a spin 1 particle, so I think that should play a role. However, the part of quantum mechanics that dealt with angular momentum and spin was a bit treacherous for me. Any help is greatly appreciated.
roe(+) --> pi(0)pi(+)
roe(-) --> pi(0)pi(-)
roe(0) --> pi(+)pi(-)
the following decay is not allowed:
roe(0) --> pi(0)pi(0)
I am pretty sure the reason is that it violates a conservation law, but I don't know which one. We have barely touched on what quantities are conserved in lecture. I can see that charge is conserved in all cases, so no problem there.
We are also told that the roe meson is a spin 1 particle, so I think that should play a role. However, the part of quantum mechanics that dealt with angular momentum and spin was a bit treacherous for me. Any help is greatly appreciated.