# Why the carrying force fields must be the fields of Boson particles?

1. Dec 1, 2011

### ndung200790

Please teach me this:
Why carrying force particles must be Bosons and matter particles must be Fermions?By the way,why do we concentrate on Gauge Symmetries?Is it correct that is because the Gauge theories lead to vector Bosons that carrying forces?
Thank you very much for your kind helping.

2. Dec 1, 2011

### Simon Bridge

A classical force field needs it's carriers to be able to have many particles in the same state.

Bear in mind that at this level we are basically looking at nature and seeing what is there in that sense the bosons and fermions have their characteristic roles because those are what we have found... you are wondering if it has to be that way. This is pretty much an area of active research - there are lots of ideas.

Generally, though, we don't think of our theories as giving rise to nature ... more the other way around. The Gauge theories are attempts to come up with a simpler more complete description or model for what we find in nature. We concentrate on the symmetries because that makes the math easier - and interesting stuff happens there.

Aside: when writing English, we put a space after trailing punctuation like commas and question marks. It help people read what you write.

3. Dec 1, 2011

### Naty1

http://en.wikipedia.org/wiki/Boson

You can get an idea about the usefulness of guage symmetries by skimming here even if you don't know [like me] all the underlying math:

http://en.wikipedia.org/wiki/Gauge_symmetry

The prior post ('makes the math easier') is right on...such symmetries also leads to useful predictions.

According to symmetry between the forces, at high enough temperatures (at the big bang) for example, the electromagnetic and weak nuclear forces are actually part of one and the same force.....today that symmetry (unity) is obscured by the Higgs ocean.

Last edited: Dec 1, 2011
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