Abstract
In this chapter we will discuss the production and decay of those baryons which are made up of u-, d- and s-quarks. It will be shown that the spin of the baryons is equal to the vector sum of the spins of the three constituent quarks and that the magnetic moments and the masses calculated with this assumption excellently agree with the experimental results. Polarized deep-inelastic scattering experiments are addressed that revealed the surprising result that the fraction of the nucleon’s spin which can be attributed to the current-quark spins may be small. Finally, semileptonic weak baryon decays are discussed in some detail.
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Notes
- 1.
The mass difference between the \(\Sigma ^{{\ast}-}\) and the \(\Sigma ^{{\ast}+}\) is roughly 4 MeV/c 2 (see Table 16.1 on p. 265).
Table 16.1 The masses of the lightest baryons both from experiment and as fitted from (16.12). The fits were to the average values of the various multiplets and are in good agreement with the measured masses. Also included in this table are the lifetimes and most important decay channels of these baryons [15]. The four charged \(\Delta\) resonances are not individually listed - 2.
The discovery of parity violation in the weak interaction was through the anisotropic emission of electrons in the β-decay of atomic nuclei [17].
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Povh, B., Rith, K., Scholz, C., Zetsche, F., Rodejohann, W. (2015). Baryons. In: Particles and Nuclei. Graduate Texts in Physics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-46321-5_16
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DOI: https://doi.org/10.1007/978-3-662-46321-5_16
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