Question

17a. Weak interaction is mediated by _________ particles

a. photons b. baryons c. hyperons d. W+ , W- , and Z0 bosons

17b. An example for doubly magic nucleus is

a. 2He 4 b. 2He 3 c. 1H 2 d. 1He 3

17c. Imagine a particle is made of three u quarks. What is the colour quantum number of the particle?

a. Red b. Blue c. Green d. None of the above

17d. The following is an example for the strange behavior of K mesons.

a. Two life time b. K meson and hyperons are always produce together c. Heavy mass of K mesons d. None of above

Answer 1

a) d: weak interaction is mediated by W+, W- and Z0 bosons.

b) a: 2 He 4 has two protons and 2 nuetrons, both of which are magic numbers. So it is doubly magic nucleus.

c) d: none of these. The red, green and blue quarks in the particle or here baryon, together make it colorless.

d) b: The production of k mesons and hyperons together can be considered as an example of strange behavior.