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Redefining Reality - The Intellectual Implications of Modern Science

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<strong>The</strong> hadrons are made up <strong>of</strong> quarks, which come in three pairs, up/<br />

down, top/bottom, and strange/charm. Quarks and their associated<br />

antiquarks can join together to form mesons, but usually, they<br />

come together in triplets, creating baryons. <strong>The</strong>re are 14 baryons,<br />

including the proton and the neutron.<br />

Breaking things down to their most elementary bits, from the six<br />

quarks and the three leptons, we can build up all the particles we see.<br />

Those particles interact, and theory accounts for their interactions<br />

in terms <strong>of</strong> the exchange <strong>of</strong> other particles called bosons.<br />

<strong>The</strong>re are four gauge bosons, which carry the various forces<br />

between fermions. <strong>The</strong> most famous is the photon or light particle,<br />

which carries electromagnetic force between particles. Light is<br />

thought <strong>of</strong> as a particle, a quantum <strong>of</strong> electromagnetic energy that<br />

is emitted and absorbed by fermions or collections <strong>of</strong> them. This is<br />

how forces allow particles to act on one another.<br />

In this scheme, there was one element left out, the Higgs boson,<br />

which was required to give mass to those particles that possess it. It<br />

<br />

gave anomalous results. But if this boson was added to the mix,<br />

<br />

boson in 2012, the standard model has been accepted as a nearly<br />

complete account <strong>of</strong> the physical world.<br />

<br />

<strong>The</strong> usual way <strong>of</strong> talking about the standard model makes us think<br />

<strong>of</strong> the subatomic world as being composed <strong>of</strong> basic uncuttable<br />

particles—the classical Greek atoms. But recall that this is coming<br />

out <strong>of</strong> quantum mechanics. We can think <strong>of</strong> particles because we<br />

are talking about quantized elements, but elements <strong>of</strong> what? Here is<br />

where we return to de Broglie.<br />

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