Question

1. This problem acquaints you with some of the standard terminology used in particle physics. You will need to know that scalar means J-0, vector means J-1, isoscalar means 1 = 0, isodoublet means 1-1/2, sovector means I i, strange means having Sメ0. In addition, decuplet baryons refers to the 10 lightest J- 3/2 baryons made from u, d, and s quarks, while octet baryons refers to the 8 lightest J 1/2 baryons made from u, d, and s quarks. Hint: Use Eqs. 15.4 and 15.5, and Figs. 15.3 and 15.4 of Henley-Garcia. In the following, the question "How does it decay?" means give both the dominant decay products and the interactions responsible. (a) What is the member of the isodoublet decuplet baryon with Is-+? How does it decay? (b) Which are the light unflanored isovector mesons? Give the quark content of each c) What is the member of the isovector octet antibaryon with I3- +1 How does it decay? (d) What are the lightest pseudoscalar isovector mesons? How do they decay?

Answer 1

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