Re: Neutrino generation from electrons?

ebunn_at_lfa221051.richmond.edu
Date: 03/22/05 

Date: Tue, 22 Mar 2005 19:43:31 +0000 (UTC)

In article <1111429211.372740.180280@z14g2000cwz.googlegroups.com>,
 <it@knowledge.co.uk> wrote:
>Can anyone tell me if neutrinos can be produced from high energy
>electrons colliding with anything?

Sure. The guiding principle of particle physics (which according to
John Ellis is also the guiding principle of Swiss law) is "whatever is
not forbidden is compulsory." That means that pretty much any
reaction you can write down, as long as it doesn't violate some
fundamental conservation law, will happen with some probability.

One such reaction, for instance, is an electron and positron colliding
to form a neutrino and an antineutrino. Another one that's quite
common in nature is an electron and proton combining to form a
neutron and a neutrino. For this one to occur, you don't even need a
high-energy electron: it happens in the form of beta decay known as
electron capture, with electrons that have ordinary atomic-physics
energies (that is, tens of electron volts).

-Ted 

-- 
[E-mail me at name@domain.edu, as opposed to name@machine.domain.edu.]

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