Particles and Nuclei by Bogdan Povh Klaus Rith Christoph Scholz Frank Zetsche & Werner Rodejohann

Author:Bogdan Povh, Klaus Rith, Christoph Scholz, Frank Zetsche & Werner Rodejohann
Language: eng
Format: epub
Publisher: Springer Berlin Heidelberg, Berlin, Heidelberg

The two pairs K*−, and K*0, K*+ are both strong isospin doublets.

The ϱ, ω, ϕ and K∗ are all of the possible 3 × 3 = 9 combinations. They have all been seen in experiments – which is clear evidence of the correctness of the quark model.1 This classification is made clear in Fig. 15.1. The vector mesons are ordered according to their strangeness S and the third component of the isospin I 3. The threefold symmetry of this scheme is due to the three fundamental quark flavours from which the mesons are made. Mesons and antimesons are diagonally opposite to each other and the three mesons at the centre are each their own antiparticles.

Fig. 15.1The lightest vector () (left) and pseudoscalar mesons () (right), classified according to their isospin I 3 and strangeness S

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