Particles

Question 1

What is the quark structure of the K+?

Answer 1

up and anti-strange

Question 2

What is the baryon number of the K+?

Answer 2

zero

Question 3

What is the antiparticle of the K+?

Answer 3

K-

Question 4

Give 5 quantities that may be conserved in a decay and

Answer 4

1. baryon number 2. energy 3. charge 4. momentum 5 baryon/lepton number

Question 5

What to particles does the K+ kaon decay into and why

Answer 5

π⁺ and π⁰

must have no charge to obey charge conservation

Question 6

Describe how the strong nuclear force between two nucleons varies with the separation of the nucleons, quoting suitable values for separation

Answer 6

1. repulsive below 0.5 fm
2. attractive up to 3 fm
3. has a short range

Question 7

Name the interaction between protons and the exchange

Answer 7

electromagnetic force

virtual photon