標題: | Notes on high-energy limit of bosonic closed string scattering amplitudes |
作者: | Chan, Chuan-Tsung Lee, Jen-Chi Yang, Yi 電子物理學系 Department of Electrophysics |
公開日期: | 14-八月-2006 |
摘要: | 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 Virasoto constraints, which were adopted in the previous works to calculate the ratios among high-energy open string scattering amplitudes of different string states, persist for the case of closed string. However, we clarify the previous saddle-point calculation for high-energy open string scattering amplitudes and claim that only (t, u) channel of the amplitudes is suitable for saddle-point calculation. We then discuss three evidences to show that saddle-point calculation for high-energy closed string scattering amplitudes is not reliable. By using the relation of tree-level closed and open string scattering amplitudes of Kawai, Lewellen and Tye (KLT), we calculate the high-energy closed string scattering amplitudes for arbitrary mass levels. For the case of high-energy closed string four-tachyon amplitude, our result differs from the previous one of Gross and Mende, which is NOT consistent with KLT formula, by an oscillating factor. (c) 2006 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.nuclphysb.2006.05.024 http://hdl.handle.net/11536/11918 |
ISSN: | 0550-3213 |
DOI: | 10.1016/j.nuclphysb.2006.05.024 |
期刊: | NUCLEAR PHYSICS B |
Volume: | 749 |
Issue: | 1-3 |
起始頁: | 280 |
結束頁: | 290 |
顯示於類別: | 期刊論文 |