One-loop Massive Scattering Amplitudes and Ward Identities in String Theory

Details One-loop Massive Scattering Amplitudes and Ward Identities in String Theory One-loop Massive Scattering Amplitudes and Ward Identities in String Theory

2004-11-23

arxiv.org/abs/hep-th/0411212v3

Prog.Theor.Phys. 115 (2006) 229-243

Physics

High Energy Physics

High Energy Physics - Theory

18 pages. v3: refs updated. Final version to appear in Prog. Theor. Phys

Scientific paper

10.1143/PTP.115.229

We calculate bosonic open string one-loop massive scattering amplitudes for some low-lying string states. By using the periodicity relations of Jacobi theta functions, we explicitly prove an infinite number of one-loop type I stringy Ward identities derived from type I zero-norm states in the old covariant first quantized (OCFQ) spectrum of open bosonic string. The subtlety in the proofs of one-loop type II stringy Ward identities is discussed by comparing with those of string-tree cases. High-energy limit of these stringy Ward identities can be used to fix the proportionality constants between one-loop massive high-energy scattering amplitudes of different string states with the same momenta. These proportionality constants can not be calculated directly from sample calculations as we did previously in the cases of string-tree scattering amplitudes.

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