7.3 IBPhysics Quarks

How many (valence) quarks does a baryon have?

• 1

• 2

• 3

• 4

Quarks are_____________________ particles which make up ________________________.

• fundamental; leptons

• fundamental; hadrons

• fundamental; force bosons

True of false? Quarks don't interact via the weak force.

• true

• false

True or false? Quarks interact with leptons and via which force?

• False

• True; electromagnetic

• True; strong

Which is the lightest quark?

• up

• down

• strange

• charm

What is the charge on a down quark (in units of e)?

• +2/3

• -1/3

• -1

• +1

What is the electic charge on an anti-strange quark?

• +1/3

• -1/3

• +2/3

• -2/3

What is the Baryon number (B) on an anti-up quark?

• 0

• -1

• +1/3

• -1/3

• +1

Which quarks is a proton made of?

• uud

• udd

• uuu

• ddd

Which quarks is a π⁺ made of?

• up and down

• anti-up and down

• up and anti-down

• anti-up and anti-down