Post by giuseppe
could anybody tell me something about braneworld?
are there any good books or references you could give me?
There are at least two different research areas associated with the term
"brane world" which share some common ingredients but are rather disjoint,
as far as I am aware.
One of them is concerned with making cosmological models where some (our)
universe is modeled as the worldvolume of a p-brane (3-brane in particular)
which itself propagates in a higher-dimensional spacetime.
Reviews of this approach are for instance
Brane cosmology: an introduction
These brane world models are often (not always) more "string inspired" than
really string theoretic in that all they (often) really take as input from
string theory is the idea that there may be something like branes in the
I am not an expert on this stuff, but personally I find it interesting that
in these brane models it is rather natural to find realizations of the
inflaton field in terms of tachyonic string modes between brane/anti-brane
pairs or in terms of "radions" or other moduli. See for instance
Burgess, C. P.; Martineau, P.; Quevedo, F.; Rajesh, G.; Zhang, R. -J.:
Brane-Antibrane Inflation in Orbifold and Orientifold Models
The inflaton and the Higgs field are the two famous tachyonic fields that
are postulated by our currently best ("standard") models of cosmology and
particle physics, without having been observed yet.
The other research area often associated with the word "brane world" is that
part of string phenomenology which tries to realize the standard model of
particel physics by studying compactifications of string theory with
intersecting D-branes in the compact dimensions. Since there are open
strings stretching between D-branes and since the low-energy effective field
theory of generated by these depends on the nature of these D-branes, one
can engineer a wide variety of standard-model-like effective field theories
by considering string backgrounds with suitable configurations of
Reviews for this topic are for instance
Ralph Blumenhagen, Mirjam Cvetic, Paul Langacker, Gary Shiu
Toward Realistic Intersecting D-Brane Models
Intersecting D-brane Models
Here, too, it is interesting how the important tachyon, in this case the
Higgs, is realized in these models. See for instance
D. Cremades, L.E. Ibanez, F. Marchesano
Intersecting Brane Models of Particle Physics and the Higgs Mechanism
Lubos has a while ago reviewed a recent paper on this topic