Ward Identities in String Theory

21.10.2025 14:00 - 15:30

Jnan MAHARANA (IOPB, Bhubaneswar)

Abstract:
It is well known that string theories are very rich in symmetry contents. I shall focus
on massless sector of closed bosonic string. The effective action is known to be
invariant under general coordinate transformations and under 'vector' gauge
transformation of 2-form potential. For compactified closed string it admits nonabelian
gauge invariance associated with massless gauge excitations. These symmetries are
not exhibited by the worldsheet action which respects two-dimensional diffeo-
morphism invariance. I shall show how the abovementioned target space local
symmetries can be studied in Hamiltonian formulation of the theory in the worldsheet.
There are some shortcomings and I shall propose possible resolutions.

Organiser:
S. Fredenhagen, M. Sperling
Location:

Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanng. 5, 5. St., 1090 Wien

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