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arXiv 1008.4773hep-thgr-qc
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高能弦-膜散射:领先程函和超越

High-energy string-brane scattering: leading eikonal and beyond

Giuseppe D'Appollonio, Paolo Di Vecchia, Rodolfo Russo, Gabriele Veneziano

摘要:

我们将以前的跨普朗克能量弦-弦碰撞的计算方法推广到闵可夫斯基时空中无质量闭弦从一堆NP-膜的高能散射。我们表明,一个有效的非平凡的度量出现从弦散射振幅通过比较它们对半经典动力学的高能量弦在极端p膜背景。通过改变能量,碰撞参量和有效的开弦耦合,我们能够探索各种有趣的制度,并重现经典的期望,包括潮汐力的激发,甚至超越领先的程函近似。

英文摘要:

We extend previous techniques for calculations of transplanckian-energy string-string collisions to the high-energy scattering of massless closed strings from a stack of N Dp-branes in Minkowski spacetime. We show that an effective non-trivial metric emerges from the string scattering amplitudes by comparing them against the semiclassical dynamics of high-energy strings in the extremal p-brane background. By changing the energy, impact parameter and effective open string coupling, we are able to explore various interesting regimes and to reproduce classical expectations, including tidal-force excitations, even beyond the leading-eikonal approximation.

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