Quarks to Cosmos Lecture Sheet 10

Standard Model & Neutrinos

What is the Standard Model?

Theory of fundamental particles and forces (except gravity).

How many generations of matter?

Three; differ in mass and stability.

Force carriers?

Photon, W/Z, gluon, Higgs.

Difference between quarks and leptons?

Quarks feel strong force; leptons do not.

What is a neutrino?

Neutral, tiny mass, interacts only via weak force.

What makes an electron neutrino?

Created with electrons in weak interactions.

Solar neutrino problem?

Too few detected neutrinos; solved by oscillations.

Experiment that solved it?

SNO (Sudbury Neutrino Observatory).