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View Full Version : Episode 69: The Large Hadron Collider and the Search for the Higgs-Boson

Fraser
2008-Jan-15, 02:50 AM
When it was first developed, the standard model predicted a collection of particles, and thanks to more and more powerful colliders, physicsists have been able to find them all except one: the Higgs-Boson. It's an important one because it should explain how objects have mass. The European Large Hadron Collider should have the power and sensitivity to find the Higgs-Boson.http://feeds.feedburner.com/~r/astronomycast/~4/209647840

More... (http://feeds.feedburner.com/~r/astronomycast/~3/209647840/)

damian1727
2008-Jan-24, 10:09 AM
we are just a bit speechless harry

Hydrogen is made of very few particles, does this not explain why it has 'lighter than air' properties?

yes harry

maybe when we unifiy quantum theory and relativity someone will answer you

tho if the higgs turns up......

Sp1ke
2008-Jan-30, 02:12 PM
...like spinning a ball on a piece of string creates a force that travels in towards the axis of the spin, so the rapidly circling magnetic field surrounding the Earth does the same.

Surely this force is going in the wrong direction. If you imagine yourself as the earth, whirling a ball on a string around you, you can feel the ball pulling away from you, not falling towards you.

Sp1ke
2008-Jan-31, 09:30 AM
I think it's more that you need to exert force inwards to stop the ball from flying off at a tangent. The motion of the ball does not cause an inwards force.
A better example might be if you sit on a roundabout and set it spinning. If you don't hold on tightly, you'll be thrown off, not pulled inwards to the centre...

Sp1ke
2008-Feb-01, 09:47 AM
I don't think so, Harry. What the wiki extract above says is that you need to generate an inwards (centripetal) force to maintain an object in orbit. In the example before, that's you pulling on the string to stop the ball flying off at a tangent. And for the earth, gravity provides the centripetal force that keeps objects in orbit.

The key statement is that "...centripetal force is a force requirement, not a particular kind of force." What I thought you were saying, Harry, was that an object in orbit somehow generates an inward (centripetal) force, which I don't think is correct.

Sp1ke
2008-Feb-02, 01:50 AM
So are you saying that electromagnetism is the same as gravity? Or that electromagnetism generates gravity?

In the first case, there are big differences between electromagnetism and gravity. (I think this thread covers these: http://www.bautforum.com/questions-answers/69679-why-isnt-obvious-gravity-electro-magnetism-stronge-nuclear-force.html)

In the second case, what's the mechanism whereby electromagnetism generates a gravitational field? And why isn't it reproducible in a lab (because it would be pretty obvious if it happened)?

Or have I got the wrong end of the stick and there's a third option?

rogerg_au
2008-Aug-08, 12:31 AM
I haven't had a chance to listen to many episodes lately, so this might have been mentioned, sorry if I'm repeating news, but I found this today:

It's a YouTube video about the Large Hadron Collider. I thought it does a good job of summing up what I remember from the AstronomyCast episode.

Roger.

bandopening
2008-Aug-08, 05:07 PM
This may have been mentioned a million times before, but, what the heck, it is worth mentioning again:

I ran into an incredible video about Cern. It is a video Rap. Now, I'm not in to rap music, but this is really great.
Take a look:
http://www.vimeo.com/1431471

Ron