We derive stringy symmetries with conserved charges of arbitrarily high spins from the
decoupling of two types of zero-norm states in the old covariant first quantized (OCFQ) …

We study the implication of decoupling zero-norm states in the high-energy limit, for the 26-
dimensional bosonic open string theory. Infinitely many linear relations among 4-point …

We derive stringy Ward identities from the decoupling of two types of zero-norm states in the
old covariant first quantized (OCFQ) spectrum of open bosonic string. These Ward identities …

High-energy limit of zero-norm states in the old covariant first quantized spectrum of the 26D
open bosonic string, together with the assumption of a smooth behavior of string theory in …

We review high energy symmetries of string theory at both the fixed angle or Gross regime
(GR) and the fixed momentum transfer or Regge regime (RR). We calculated in details high …

A bstract We study scattering amplitudes of higher spin closed-string states off D-branes. For
states in the 'first Regge trajectory'we find remarkable simplifications both at tree level and at …

We calculate high energy massive string scattering amplitudes of open bosonic string in the
Regge regime (RR). We found that the number of high energy amplitudes for each fixed …

We use three different methods to calculate the proportionality constants among high-energy
scattering amplitudes of different string states with polarizations on the scattering plane …

We study bosonic closed string scattering amplitudes in the high-energy limit. We find that
the methods of decoupling of high-energy zero-norm states and the high-energy Virasoro …

We calculate and identify the counterparts of zero-norm states in the old covariant first
quantized (OCFQ) spectrum of open bosonic string in two other quantization schemes of …