TASI Lectures on Remnants from the String Landscape
release_peuqwjafurfktiumi75yvx5exi
by
James Halverson, Paul Langacker
2018
Abstract
Superstring theories are very promising theoretically, but the enormous
landscape of string vacua and the (likely) very large underlying string scale
imply that they may never be tested directly. Nevertheless, concrete
constructions consistent with the observed world frequently lead to observable
remnants, i.e., new particles or features that are apparently accidental
consequences of the ultraviolet theory and that are typically not motivated by
specific shortcomings of the standard models of particle physics or cosmology.
For example, moduli, axions, large extended gauge sectors, additional Z'
gauge bosons, extended Higgs/Higgsino sectors, and quasi-chiral exotics are
extremely common. They motivate alternative cosmological paradigms and could
lead to observable signatures at the LHC. Similar features can emerge in other
standard model extensions, but in the stringy case they are more likely to
occur in isolation and not as part of a more complete TeV-scale structure.
Conversely, some common aspects of the infinite "landscape" of field theories,
such as large representations, are expected to be very rare in the string
landscape, and observation of features definitively in the swampland could lead
to falsification. In this article, common stringy remnants and their
phenomenology are surveyed, and implications for indirectly supporting or
casting doubt on string theory are discussed.
In text/plain
format
Archived Files and Locations
application/pdf 1.1 MB
file_j6tyhzal4jgojcvg43t77y2noq
|
arxiv.org (repository) web.archive.org (webarchive) |
1801.03503v1
access all versions, variants, and formats of this works (eg, pre-prints)