| 31. | But every theorist and his uncle knew that these particles had an isospin, or number, of {.
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| 32. | These nucleons are acted upon equally by the strong interaction, which is invariant under rotation in isospin space.
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| 33. | Isospin is defined in the SU ( 2 ) model while the SU ( 3 ) model defines hypercharge.
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| 34. | Isospin symmetry is a subset of the flavour symmetry seen more broadly in the interactions of baryons and mesons.
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| 35. | The electric charge, third component of weak isospin ( also called or ) and weak hypercharge are related by
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| 36. | Given that charge conjugation and isospin are preserved by strong interactions, so is " G ".
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| 37. | In isospin space, neutrons can be transformed into protons via SU ( 2 ) symmetries, and vice versa.
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| 38. | For example, a proton-neutron pair can be coupled in a state of total isospin 1 or 0.
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| 39. | Similar to a spin particle, which has two states, protons and neutrons were said to be of isospin.
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| 40. | By assuming that isospin was conserved by nuclear interactions, the new mesons were more easily accommodated by nuclear theory.
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