James Fodor

speaker

3,084 appearances 4 recordings 1 series first heard Jun 2026 last heard 30 Aug

James Fodor’s voice in public audio — every appearance, attributed to the second.

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Recordings per month over the last 12 months — 4 in all, peaking in Aug 2026 with 2.

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The Science of Everything Podcast · Episode 163: The Standard Model of Particle Physics · 8 Aug 2026 podcast

So for example, a muon, other than its half-life and and higher mass, behaves like an electron.

A charm quark behaves like an up quark, and so forth.

Again, there are certain differences in certain contexts, which we'll get to, but broadly speaking, for uh that that they have the same properties.

So for example, a charm quark has the same spin as uh an up quark.

I mean, they all have spin half, so that's the same.

It has the same charge as an up quark, so positive two over three.

that their properties in terms of colour charge also the same.

So charm quarks can have any of the three colours and then their corresponding anticolors, just like an up quark can.

So there's no difference between them in most respects.

Uh there are only very certain respects in which they differ, um, which we'll get to in a little bit.

Now there's one further complication to the standard model, which is that each of the particles that I've talked about also has its corresponding antiparticle.

So you've probably heard of antimatter.

The most commonly known example of antimatter is the anti-electron, which is also called a positron.

Antimatter has exactly the same properties as regular matter, except it has the opposite electric charge.

So a positron is the same as an electron, except it has a charge of positive one instead of minus one.

Every other particle uh ha also has its corresponding antiparticle.

So just like there's an up quark, there's an anti-up quark, a down quark, an anti-down quark, and so forth.

And in fact, because antimatter has the same properties as regular matter apart from the electric charge, you can actually form anti-protons and anti-neutrons, which are just formed of their regular up and down quark constituents, except replaced with the anti-up and anti-quark versions.

You can even form an anti-hydrogen atom, which has an antiproton.

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