Satellite Could See Shadow Of Extra Dimensions
be well, be love.
satellite could see shadow of extra dimensions
22:05 12 february 2007
newscientist.com news service
a satellite to be launched next year could see signs of extra dimensions in
the afterglow of the big bang, a new study says.
some theories ? such as string theory ? that attempt to unify all known forces
into a single "theory of everything" posit the existence of extra spatial
dimensions beyond the three familiar ones.
but string theory has proven stubbornly resistant to experimental tests
(although some physicists say it could be tested in the large hadron collider
scheduled to open by the end of 2007).
now, gary shiu and bret underwood, both physicists at the university of
wisconsin in madison, us, say the shape of the extra dimensions could leave an
imprint in the afterglow of the big bang. this glow, called the cosmic microwave
background, reveals the structure of the universe about 370,000 years after the
they use a popular model of the universe's early growth called
dirac-born-infeld (dbi) inflation, which is inspired by string theory. it is one
of a class of ideas called braneworld models, which state that our universe is
like a sheet of paper floating in a higher dimensional space.
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