Particle interactions #3 Flashcards
What do weak interactions include
Leptons
What is the first thing that occurs in electron capture
An atomic electron is absorbed by a proton in the nucleus
What is the second thing that occurs in electron capture
A proton emits a W*+ boson
What is the fourth thing that occurs in electron capture
The electron is transformed into an electron neutrino
What is the third thing that occurs in electron capture
The boson gets absorbed by the electron
What is the fifth thing that occurs in electron capture
On emitting W^+, the proton turns into a neutron
What is the equation for electron capture
p + e^- = n + Ve
(1- -1 = 0 - 0)
When was the electron discovered
1897
(Thomson)
When was the nucleus discovered
1911
(Rutherford)
When was the proton discovered
1920
(Rutherford)
Since when has the photon been known
1905
When was the neutron discovered
1932
(Chadwick)
When was the neutrino hypothesised
1930
When was the neutrino discovered
1956
(26 years after hypothesised)
Simple definition of a hadron
Heavy particles
