anti-neutrino and neutrino

A forum designed mainly for high school physics students in New South Wales, Australia.
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danny0808
Posts: 6
Joined: Thu Jul 09, 2009 2:23 pm
Location: Chatswood

anti-neutrino and neutrino

Post by danny0808 »

Hello,

I know its probably an easy question but whats the difference between and anti neutrino and neutrino.

I think in negative beta decay an antineutrino is produced and then in positive beta decay a neutrino is produced but I dont understand what really is the difference.

Thanks!
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joe
Posts: 755
Joined: Fri Aug 29, 2003 11:57 am
Location: Sydney

Post by joe »

I know its probably an easy question but whats the difference between and anti neutrino and neutrino.
The neutrino was originally proposed as a particle having spin, but no mass or charge, in order to conserve spin in nuclear reactions. As spin is (or was thought to be) its only property, then it is the only quantity to be reversed in its antiparticle: an antineutrino has opposite spin to a neutrino.

Recent results suggest a non-zero but very small mass for the neutrino. This complicates the picture very considerably.

Joe
danny0808
Posts: 6
Joined: Thu Jul 09, 2009 2:23 pm
Location: Chatswood

Post by danny0808 »

Thanks heaps for your help Joe, understand everything now.
Thanks again for your time, really appreciate it :D
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