Lecture 4 | New Revolutions in Particle Physics: Standard Model

[bundawartini]

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[fitnesus]

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[cenedywong]

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[Onepissite]

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[grunder20]

learned a lot.

[felpaluche]

I learned a lot. Thanks.

[PzyberZpace]

Where to find lecture 3?

[amas2010]

@PzyberZpace in itunes u

[mathforphysics]

The comment at 7:00 was helpful. There are different matrix representations of the same group. But I thought SU(3), by definition, requires a 3X3 matrix representation.

[gorgolyt]

@mathforphysics even outside of the world of matrices a group (e.g. this group) will have many representations. technically a group is simply a mathematical object with structure that exists on its own, without any actual interpretation.

staying inside the world of matrices, it is still easy to think of other interpretations. consider the group of rotations of a circle, in matrix form. naturally you would write the elements as 2x2 matrices and think of them as acting within 2-space.

[gorgolyt]

@mathforphysics however you could just as well write them as 3x3 matrices in which the z-axis is unaltered. the interpretation for this would be rotating a circle in 3-space without tilting it.

[NiteAngel]

lol New Revolutions this guy knows nothing same old shit of 30 years ago

[fermista]

I read the Black Hole War. It was brilliant :D

[bhigr]

Wow, the matrix representation into independent blocks is essential. Otherwise this wouldnt have made any sense to me.

[bhigr]

mix up, combine states? I dont understand these equations. Singulet means that you cannot transform them into another object using a unitary matrix?

[coastwalker]

This is fascinating. Hard work to keep up with but its a much better physics course than the one I took in 1980, brilliant. Sharing of this with the world very much appreciated, thanks!!

[Bluevetteboy2012]

568 views now.

[Spinprovisation]

Sometimes, Genius comes in a form we don't like.

Like a man who has had *one* of his senses taken away.

Reduce the dimensions to solve the equations.

You can thank me later!

[Spinprovisation]

You want views, or understanding?

In 1919 Einstein had 2 views. Himself & Eddington.

[QuickDrawMgraw]

Only 266 views... A shame indeed...