String Theory: Lessons for Low Energy Physics

TL;DR

This paper explores how string theory could inform low energy physics by examining its generic predictions and potential solutions to naturalness problems like CP violation.

Contribution

It compares string theory's predictions with grand unified theories and discusses its potential to address naturalness issues such as the strong CP problem.

Findings

String theory may provide generic low energy predictions.

It offers possible solutions to naturalness and symmetry problems.

Comparison with grand unified theories highlights unique features.

Abstract

This talk considers possible lessons of string theory for low energy physics. These are of two types. First, assuming that string theory is the correct underlying theory of all interactions, we ask whether there are any generic predictions the theory makes, and we compare the predictions of string theory with those of conventional grand unified theories. Second, string theory offers some possible answers to a number of troubling naturalness questions. These include problems of discrete and continuous symmetries in general, and CP and the strong CP problem in particular.