Take the 2-minute tour ×
Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free, no registration required.

A neutron can decay into a proton, an electron, and neutrino. Could an antiproton, a positron, and a neutrino combine into a neutron? Could this be where much of the "missing" antimatter is?

share|improve this question
    
well, this is completely non sense as far as quantum numbers go.neutron-->proton electron anti_e_neutrino. antineutron--> antiproton positron e_neutrino. –  anna v Jan 3 '13 at 4:45
1  
The neutron is not its own antiparticle. The antineutron is a distinct particle. It happens to have the same charge as the neutron (zero), but it has other characteristics that distinguish it. –  Keith Thompson Jan 3 '13 at 6:33
add comment

1 Answer 1

Assuming that by "negatron" you mean a anti-proton, then no. It violated the conservation of baryon number (for aproton $B = -1$ and for a neutron $B = 1$) and in any case, free neutrons are unstable--it's not just that they can decay, they will decay.

Worse still, neutrons do interact with light, albeit with a low corss-section because they are composites of charge quarks and gluons.

share|improve this answer
    
That is what I meant by "negatron". –  yakiv Jan 3 '13 at 1:33
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.