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Πέμπτη 25 Σεπτεμβρίου 2014

Quarks | Standard Model Of Particle Physics

 

Quarks | Standard Model Of Particle Physics

Ανέβηκε στις 10 Νοε 2009
http://www.facebook.com/ScienceReason ... The Standard Model of Particle Physics (Chapter 3): Up and Down Quarks

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STANDARD MODEL OF PARTICLE PHYSICS:
http://www.youtube.com/user/Best0fSci...

1) First Second Of The Universe:
http://www.youtube.com/watch?v=4HXPYO...
2) Force And Matter:
http://www.youtube.com/watch?v=p5QXZ0...
3) Quarks:
http://www.youtube.com/watch?v=PxQwkd...
4) Gluons:
http://www.youtube.com/watch?v=ZYPem0...
5) Electrons, Protons And Neutrons:
http://www.youtube.com/watch?v=Vi91qy...
6) Photons, Gravitons & Weak Bosons:
http://www.youtube.com/watch?v=JHVC6F...
7) Neutrinos:
http://www.youtube.com/watch?v=m7QAaH...
8) The Higgs Boson / The Higgs Mechanism:
http://www.youtube.com/watch?v=1_HrQV...

The
Standard Model of particle physics is a theory of three of the four
known fundamental interactions and the elementary particles that take
part in these interactions. These particles make up all visible matter
in the universe.

Every high energy physics experiment carried out
since the mid-20th century has eventually yielded findings consistent
with the Standard Model.

Still, the Standard Model falls short of
being a complete theory of fundamental interactions because it does not
include gravitation, dark matter, or dark energy. It is not quite a
complete description of leptons either, because it does not describe
nonzero neutrino masses, although simple natural extensions do.

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

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UP QUARKS

The
particle itself is a fundamental particle and is too small to be seen
by any imaginable instrument of observation. So we instead represent the
properties that allow the up quark to interact.

The central
small dot represents the weak charge of the up quark. This charge
entirely separate from electric charge gives rise to the Weak Nuclear
Force. This force causes up quarks and down quarks to swap flavours and
its typical range is much smaller than the diameter of a proton.

Surrounding
that is a volume depicted as gold for the up quark. This represents the
electric charge of the up quark, which has a positive charge of +2/3
units The electric charge is the generator of the Electromagnetic Force
which has infinite range although the drop off in strength is pretty
dramatic as we move away from the quark.

The larger volume of
shifting red, green, and blue is meant to represent the color charge
which generates the Strong Nuclear Force. This is the force that holds
quarks together in a proton or neutron. And a residuum of this force
holds the protons and neutrons together in the nucleus of atoms. This
force is a hundred times stronger than the Electromagnetic force, but
its range is limited to about the size of a proton.

DOWN QUARKS

The
particle itself is a fundamental particle and is too small to be seen
by any imaginable instrument of observation. So we instead represent the
properties that allow the down quark to interact.

The central
small dot represents the weak charge of the down quark. This charge
entirely separate from electric charge gives rise to the Weak Nuclear
Force. This force causes the down quark to change into an up quark, and
its typical range is much smaller than the diameter of a proton.

Surrounding
that is a volume depicted as purple for the down quark. This represents
the electric charge of the down quark, which has a negative charge of
-1/3 units The electric charge is the generator of the Electromagnetic
Force which has infinite range although the drop off in strength is
pretty dramatic as we move away from the quark.

The larger volume
of shifting red, green, and blue is meant to represent the color charge
which generates the Strong Nuclear Force. This is the force that holds
quarks together in a proton or neutron. And a residuum of this force
holds the protons and neutrons together in the nucleus of atoms. This
force is a hundred times stronger than the Electromagnetic force, but
its range is limited to about the size of a proton.

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The Cassiopeia Project - making science simple!

The
Cassiopeia Project is an effort to make high quality science videos
available to everyone. If you can visualize it, then understanding is
not far behind.

http://www.cassiopeiaproject.com
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