What Is the Minimum Energy Required for e + p -> Neutrino + Neutron?

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SUMMARY

The minimum energy required for the reaction e + p -> neutrino + neutron is determined by applying energy and momentum conservation principles. The kinetic energy of the proton is negligible compared to its rest mass energy, while the electron's kinetic energy is significant. The borderline case occurs when the neutrino energy approaches zero, necessitating the electron to possess sufficient energy to overcome the attractive force between the electron and proton. This scenario can be likened to calculating escape velocity in gravitational contexts.

PREREQUISITES
  • Understanding of energy and momentum conservation principles
  • Familiarity with relativistic energy equations, specifically pc = sqrt(E^2 - m0^2*c^4)
  • Basic knowledge of particle physics, including electron and proton interactions
  • Concept of escape velocity in gravitational fields
NEXT STEPS
  • Research the concept of escape velocity and its application in electric fields
  • Study relativistic energy equations in detail, focusing on particle interactions
  • Explore the properties of neutrinos and their role in particle physics
  • Learn about the forces acting between charged particles, specifically in electron-proton interactions
USEFUL FOR

Students in introductory physics, particularly those studying particle interactions and energy conservation, as well as educators seeking to clarify concepts related to particle physics and energy calculations.

shahar weiss
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Homework Statement



Im being asked what is the minimum energy requiered for the process
e + p -> nutrino + nutron
assumptions are: 1. Kinetic energy of proton is much lower from his rest
mass, not true for the electron.
2. border line case is when nutrino energy is close to zero.



Homework Equations


energy and momentum conservation, pc = sqrt(E^2 - m0^2*c^4) ?


The Attempt at a Solution



i should use energy and momentum conservation but i have no idea how to
do that since i don't know what are the kinetic energies of the
proton and electron.
thank you for any help avaiable
 
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You could attempt to figure out the minimum initial kinetic energy needed for the electron to overcome the repulsive force of the proton...think of it as an electric version of the escape velocity question in gravitation.

Edit: I just noticed this is in the introductory physics section...so there is probably a simpler solution to this problem...I'll give it a little more thought.
 
since they are opposite in charge there would be a pulling force and not repulsive
 

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