Question #03070

1 Answer
Oct 8, 2017

Answer:

#n + e^+ -> p + bar v_e#

Explanation:

A neutron and positron interact in the following way

#n + e^+ -> p + bar v_e#

producing a proton and an anti-electron neutrino.

The proton conserves charge, as the neutron has #0# charge, the positron is #-1# (negative because it is antimatter), the proton is #+1# and the neutrino is #0#, like the positron, as is is an anti-neutrino, not simply a neutrino.

The neutrino is produced to conserve lepton number, as both proton and neutron have lepton numbers of #0# and baryon numbers of #1#, hence baryon number is also conserved.

By thinking about all of these conserved quantities, you can deduce what must be produced on the right side of the equation.