E(lementary) Strings in Six-Dimensional Heterotic F-Theory

Understand

Using E-strings, we can analyze not only six-dimensional superconformal field theories but also probe vacua of non-perturabative heterotic string.

• We study strings made of D3-branes wrapped on various two-cycles in the global F-theory setup.
• We claim that E-strings are elementary in the sense that various combinations of E-strings can form M-strings as well as heterotic strings and new kind of strings, called G-strings.
• Using them, we show that emissions and combinations of heterotic small instantons generate most of known six-dimensional superconformal theories, their affinizations and little string theories.