Fundamental Particles Flashcards
What are the 4 antimatter particle types? And their charges?
Positron (e+): charge +1
Anti-Electron (Pbar): charge -1
Anti-Neutron (nbar): charge 0
Anti-Neutrino (vbar): charge 0
Properties of antimatter.
Identical masses and rest mass energy as their matter counterparts.
What are the 2 classes of Hadrons?
Baryons and Mesons
What is the quark setup of a baryon?
3 quarks
What is the quark setup for mesons?
Quark and anti-quark pair.
Are hadrons affected by the strong nuclear force?
Yes
What are the 6 leptons?
Electron
Muon
Tau
Electron Neutrino
Muon Neutrino
Tau Neutrino
Differences between the Lepton flavours.
Electron, Muon and tau all have charge of -1e and they all experience electromagnetic force.
Electron Neutrino, Muon Neutrino and Tau neutrino all have no charge and negligible mass. They’re abundant.
Muo and Tau are similar to electrons but have slight larger mass. Muon:0.5u, Tau:2u, Electron:0.0005u.
Quark model of proton
UUD
Quark model of neutron
UDD
Whats the 3 types of Quarks?
Up
Down
Strange
Whats the charge on an Up Quark?
+2/3 e
What’s the charge on a down quark?
-1/3e
Whats the charge on a strange quark?
-1/3e.
What does beta decay happen via?
The weak interaction (1 of the 4 fundamental forces)
What happens during beta minus decay?
A beta minus particle (high energy electron) is emitted.
Neutron tuns into a proton, emitting an electron and an anti-electron.
Number of protons increases by 1, nucleon number is constant.
What happens during beta plus decay?
A beta plus particle (high energy positron) is emitted from the nucleus.
Proton turns into a neutrino, emitting a positron and an electron neutrino.
Number of protons decreases by 1, nucleon number is constant.
Quark model of beta minus decay.
Down quark turns into up quark.
Quark model of beta plus decay.
Up quark turns into a down quark.
