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M$1 June 08, 2009 01:46 PM

Explain the different quark combinations, for example, one combination, muons breaking down into electrons and neutrinos.

List all the known quark combinations.
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June 08, 2009 04:17 PM
I'm not sure I entirely understand your question.

First off, muons are leptons, which are a separate class of elementary particles from quarks. They do not interact via the strong force, unlike quarks.

As for quarks, there are 6 types of quarks (up, down, charm, strange, top, and bottom) along with their corresponding antiquarks. With 12 total quark types, there are a very large number of potential combinations.

The quark combinations are either baryons or mesons. Wikipedia has excellent basic discussions of both these types of particles, along with lists of known particles.

The authoritative reference for known particle combinations is the Particle Data Group reference, which comes out every couple of years. I've linked to the PDG page with links to reference data of every known particle.

Disclaimer: even when I was a working physicist, I did not do particle physics. My personal expertise is that of an advanced layman.
Source(s):
http://en.wikipedia.org/wiki/Lepton
http://en.wikipedia.org/wiki/Baryon
http://en.wikipedia.org/wiki/Meson
http://en.wikipedia.org/wiki/List_of_baryons
http://en.wikipedia.org/wiki/List_of_mesons
http://pdg.lbl.gov/2009/listings/contents_listings.html

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Tags: lepton, baryon, meson, quark

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Helpful: davepamn

Tip rickg for this answer
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June 08, 2009 07:55 PM
Thanks for the quark names

Explain how quarks and subatomic combinating into a electron, neutron, proton, positron, anti-matter

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June 08, 2009 08:42 PM
Electrons and positrons (a positron is just an anti-electron) are fundamental. They are not composed of quarks.

Protons and neutrons are the most well-known (and most common) forms of baryonic matter. Each is composed of 3 quarks. The proton is made up of 2 ups and a down, and the neutron is 2 downs and an up.

In the Standard Model of particle physics, every particle has a corresponding antiparticle (which may be the particle itself; e.g. the neutral pi meson). If you want to know the combination of quarks in the antiparticle of a hadron (a baryon or meson), just "invert" the combination for the "normal" particle. So, since a proton is two ups and a down, an antiproton is two anti-ups and an anti-down.

The electric charge (among other things) of an antiparticle is opposite that of the particle. So a positron has charge +1 (electrons are -1, of course), and an antiproton has charge -1. Antineutrons have charge 0, just like neutrons.

Does that help?

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June 08, 2009 10:20 PM
Excellent answer. Explain what nuclear synethesis creates an electron.

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