0
$\begingroup$

If you look at the Feynmann Diagram of an electron capture:

enter image description here

The $W^+$ boson turns the electron into a neutrino. How is this possible? I thought the the boson carries the positive charge and converts the electrons into a positron. Why is this possible?

$\endgroup$
0

2 Answers 2

3
$\begingroup$

Converting an electron into a positron is a change of $2$ charge units, so a single $W$ can't do that. When an electron and $W^+$ meet the total charge is zero, as required.

$\endgroup$
1
$\begingroup$

A W+ boson will not be able to turn an electron into positron. It violates lepton number because electrons have +1 lepton number and antielectrons(positrons) have -1 lepton number. If an electron is +1 lepton number and positron is created by W+ boson then it is -1 lepton number. Lepton number is lost by 2 units. Also charge conservation is violated. Negatively charged particle can not turn into positively charged particle.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

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