Abstract
We calculate bosonic massive closed string states at arbitrary mass levels scattered from orientifold planes in the high-energy, fixed angle limit. For the case of O-particle scatterings, we obtain infinite linear relations among high-energy scattering amplitudes of different string states. We also confirm that there exist only closed string Regge poles in the form factor of the O-particle amplitudes as expected. For the case of O-domain-wall scatterings, we find that, like the well-known D-instanton scatterings, the amplitudes behave like field theory scatterings, namely UV power-law without infinite Regge poles. In addition, we discover that there exist only finite number of t-channel closed string poles in the form factor of O-domain-wall scatterings, and the masses of the poles are bounded by the masses of the external legs. We thus confirm that all massive closed string states do couple to the O-domain-wall.
Highlights
Being a consistent theory of quantum gravity, string theory is remarkable for its soft ultraviolet structure
The second is the existence of infinite Regge poles in the form factor of string scattering amplitudes
In order to further uncover the mysterious relations among these three fundamental characteristics of string scatterings, namely, the soft UV structure, the existence of infinite Regge poles and the newly discovered linear relations stated above, it will be important to study more string scatterings, which exhibit the unusual behaviors in the high energy limit
Summary
Being a consistent theory of quantum gravity, string theory is remarkable for its soft ultraviolet structure. For the special case of D-domain-wall scattering [19], it was discovered [20] that its form factor behaves as power-law with infinite open Regge pole structure at high energies. In order to further uncover the mysterious relations among these three fundamental characteristics of string scatterings, namely, the soft UV structure, the existence of infinite Regge poles and the newly discovered linear relations stated above, it will be important to study more string scatterings, which exhibit the unusual behaviors in the high energy limit. This is consistent with the boundary state descriptions of O-planes For both cases of O-particle and O-domain-wall scatterings, we confirm that there exist no s-channel open string Regge poles in the form factor of the amplitudes as O-planes were known to be not dynamical.
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