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# Quark questions Watch

1. Hi guys, im really stuck on this exam question. I have no idea of how to get around answering it:

"The 3-quark model originated from a theory that explained the properties of baryons and mesons. Show that the 3-Quark model explains why there are just 4 charged mesons."

I understand that there are only 4 charged mesons but i don't know how to explain why
2. http://www.youtube.com/watch?v=U0kXkWXSXRA - This will tell all
3. It's been a while (well, a year!) since AS physics and I can't be bothered finding my data sheet but basically, fit the three quarks together in as many combinations (pairs!!) as you can think of which produce either +1 or -1 charged mesons. Apparently there should only be four.
4. thanks guys! heres my answer:

A charged meson consists of a combination of two quarks (one of which is an antiquark) which results in an overall charge of +1 or -1. There are only four combinations which apply: *i listed the four combinations*

what do you think?
5. What are the four combinations???
6. up anti-down (+1), down anti-up (-1), up anti-strange (+1), strange anti-up (-1)

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Updated: November 29, 2016
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