Science > Physics > Standard Model notes on Mpl = sqroot(hd/Gn) = 1.22 E+19 GeV/c^2 part 10
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Science > Physics |
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"sulayman" |
| Date: |
07 Feb 2006 11:25:14 PM |
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Standard Model notes on Mpl = sqroot(hd/Gn) = 1.22 E+19 GeV/c^2 part 10 |
Dr Sulayman Ph.D.
2/7/06
COPYRIGHT NOTICE
Standard Model relates to Plank Mass
Influence Unification Transform
Copyright By Owner Dr Sulayman Ph.D.
First Published 2006
While the Standard Model has been very successful in describing most of the
phenomemon that we can experimentally investigate with the current
generation of particle acceleraters, it leaves many unanswered questions
about the fundamental nature of the universe. The goal of modern theoretical
physics has been to find a "unified" description of the universe. This has
historically been a very fruitful approach. For example Einstein-Maxwell
theory unifies the forces of electricity and magnetism into the
electromagnetic force. The Nobel prize winning work of Glashow, Salam, and
Weinberg successfully showed that the electromagnetic and weak forces can be
unified into a single electroweak force. There is actually some pretty
strong evidence that the forces of the Standard Model should all unify as
well. When we examine how the relative strengths of the strong force and
electroweak force behave as we go to higher and higher energies, we find
that they become the same at an energy of about 1016 GeV. In addition the
gravitational force should become equally important at an energy of about
1019 GeV.
The characteristic energy scale for quantum gravity is called the Planck
Mass, and is given in terms of Planck constant, the speed of light, and
Newton's constant,
Mpl = sqroot(hd/Gn) = 1.22 E+19 GeV/c^2
Physics at this high energy scale describes the universe as it existed
during the first moments of the Big Bang. These high energy scales are
completely beyond the range which can be created in the particle
accelerators we currently have (or will have in the foreseeable future.)
Most of the physical theories that we use to understand the universe that we
live in also break down at the Planck scale. However, string theory shows
unique promise in being able to describe the physics of the Planck scale and
the Big Bang.
In its final form string theory should be able to provide answers to answer
questions like:
Where do the four forces that we see come from?
Why do we see the various types of particles that we do?
Why do particles have the masses and charges that we see?
Why do we live in 4 spacetime dimensions?
What is the nature of spacetime and gravity?
.
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