Document Type

Course

Journal/Book Title/Conference

Physics 3710 – Intermediate Modern Physics, Spring 2018

Publication Date

1-8-2018

First Page

1

Last Page

5

Abstract

Quantum Flavor Dynamics (QFD), I

That each generation of the quark and lepton periodic tables (i.e., electron, muon, and tauon–see SM 1, p.1) has two members (a neutrino and a charged particle) that can be flipped into one another by emission or absorption of W bosons is reminiscent of how the angular momentum spin-1/2 component of a charged particle can be flipped between “up” and “down” orientations along some direction ( z ) in space by emission or absorption of photons. This analogy is made more graphic by labeling flavor rows by a new kind of “spin” (completely unrelated to angular momentum), namely, weak isospin component, Iz. The neutrino flavors are assigned a weak isospin component value of +1/2 (“up”), and the charged lepton flavors, –1/2 (“down”). Similarly, the uct quarks are assigned +1/2 weak isospin components, and the dsb quarks, –1/2.

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