Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exploring the Landscape of effective field theories   In this thesis we provide new tools to determine and explore the Landscape of
four-dimensional effective field theories originating from string and M-theory.
The main aim is to introduce, within four-dimensional effective descriptions,
elements that are predicted from string theory. To this end, a hierarchy of
forms is introduced within the four-dimensional $\mathcal{N}=1$ supergravity
theories. The inclusion of gauge three-forms delivers a dynamical way to
generate flux-induced superpotentials. Instead, gauge two-forms, dual
descriptions of axions, may be eventually gauged by three-forms to generate a
superpotential coupling between the different chiral multiplet sectors of the
theory. The mutual constraints among the background fluxes, such as tadpole
cancellations, are imposed by gauge four-forms. A hierarchy of objects, to
which the gauge forms couple, is then introduced: four-dimensional BPS-strings,
membranes and 3-branes enlarge the Landscape, allowing the background fluxes to
consistently change transversing different spacetime regions. The Freed-Witten
anomaly cancellations and the changing of tadpole cancellation conditions due
to background sources are neatly expressed by BPS-junctions of membranes ending
on strings and 3-branes ending on membranes. Membrane-mediated domain wall
transitions are studied, which determine how the scalar fields flow connecting
a vacuum to another of the Landscape. According to the perturbative regime that
is scanned only some transitions are allowed, with a dramatic influence on the
spectrum of objects that can be consistently incorporated in the
four-dimensional description.

29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
2
The categories of this paper are: math
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org