# Back to the roots of string theory (08.05.)

Rutger Boels (DESY)

08.05.2014 at 16:15

What is string theory? Even after over 40 years of research only partial

answers to this question exist. In this talk I'd like to present a possible new

approach to answering this question. This approach goes back all the way to

the roots of string theory in the analytic S-matrix program. This program aims

to construct scattering amplitudes from symmetry and consistency alone. This

approach has been very fruitfull in field theory in recent years. Based on this

philosophy I'll show how one can define tree level string theory in a flat

background without reference to a worldsheet. This talk is based on joint work

with Tobias Hansen.

Arnold Sommerfeld Center

Theresienstrasse 37

Room 348/349