| Abstract: |
The string landscape accommodates a broad range of possible effective field theories. This poses a challenge for extracting verifiable predictions as well as falsifiable signatures of string theory. All known stringy Standard Models support only low-dimensional representations of the gauge group. While it is in principle possible to produce contrived models with higher-dimensional representations, these generically appear in a tower of states with lighter ones in lower-dimensional representations, i.e., not in isolation. With this in mind, we consider a phenomenologically well-motivated beyond the Standard Model scenario with a single extra Majorana particle in a real, n-dimensional representation of SU(2) and nothing else. This scenario is not realized in any known string construction, and we conjecture that this is true of string theory in general. Detection of this scenario would thus amount to falsifying the (known) string landscape. Based on joint work with M. Baumgart, P. Christeas, and R.J. Hicks. |
