Quarks, Spacetime, and the Big Bang

Use the handout or the slides to answer these questions.

1. (5 pts) The proton has quark content uud. But the ∆+ baryon also has quark content uud !

The spin of the proton is 1/2. What is the spin of the ∆+ baryon?

∆+ spin =

2. (5 pts) The spins of the quarks in the proton can be arranged in a number of ways. Figure 1 shows three.

Figure 1: The quark spins in the proton are shown as red arrows…notice that in each example arrangement they add to +1/2. The ∆+ has the same quark content and the spins are arranged differently…which distinguishes it from the proton. The dashed lines are sitting there awaiting to be turned into spin arrows to represent the ∆+ spin arrangement. Fill them in.