Scientists propose test of string theory based on neutral
hydrogen absorption (NC&T/UIUC) String theory – a theory whose
fundamental building blocks are tiny one-dimensional filaments
called strings – is the leading contender for a "theory of
everything." Such a theory would unify all four fundamental
forces of nature (the strong and weak nuclear forces,
electromagnetism, and gravity). But finding ways to test string
theory has been difficult. Now, cosmologists at the U. of I. say
absorption features in the 21-centimeter spectrum of neutral
hydrogen atoms could be used for such a test. "High-redshift,
21-centimeter observations provide a rare observational window
in which to test string theory, constrain its parameters and
show whether or not it makes sense to embed a type of inflation
– called brane inflation – into string theory," said Benjamin
Wandelt, a professor of physics and of astronomy at the U. of I.
"If we embed brane inflation into string theory, a network of
cosmic strings is predicted to form,"