English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The operator formalism of the first quantized string theory is applied to thestringy excitations in the linear dilaton background. In particular, thenormal-ordered vertex operators in the old-covariant spectrum of the bosonicopen string, which correspond to the physical state solutions of the Virasoroconstraints, are shown to satisfy the conformal algebra. Tree-level scatteringamplitudes among different stringy states are computed using the coherent-statemethod and the modified inner product of the Hilbert space. Decoupling of thezero-norm states, i.e., the on-shell stringy Ward identities are shown to holdfor all tree-level amplitudes under consideration.

Vertex Operators and Scattering Amplitudes of the Bosonic Open String Theory in the Linear Dilaton Background