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11.3 Quarks

The six flavors and their fractional charges, how triplets and pairs build baryons and mesons, and the scattering evidence for hadron substructure.

University Physics Volume 3, 11.3 Quarks

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6 exercises

11.3 Exercise 1

What is the baryon number of a pion?

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11.3 Exercise 3

What is the general quark composition of a baryon? Of a meson?

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11.3 Exercise 5

Why do baryons with the same quark composition sometimes differ in their rest mass energies?

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11.3 Exercise 6

Based on quark composition of a proton, show that its charge is +1+ 1.

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11.3 Exercise 8

Argue that the quark composition given in the table for the positive kaon is consistent with the known charge, spin, and strangeness of this baryon.

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11.3 Exercise 12

Express the β\beta decays n→p+e−+ν−n \rightarrow p + e^{−} + \overset{−}{\nu} and p→n+e++νp \rightarrow n + e^{+} + \nu in terms of β\beta decays of quarks. Check to see that the conservation laws for charge, lepton number, and baryon number are satisfied by the quark β\beta decays.

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Adapted from University Physics Volume 3 © 2016 Rice University. Licensed under CC BY 4.0. Source: University Physics Volume 3. Imported at revision db44eb9.