Remarks on the high-energy behaviour of cross-sections in weak-scale string theories

2001/09/20 by M. Kachelriess, M. Kachelrieß, Kachelriess, M. +3 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/0109184

5 pages, no figures

arxiv created 2001/09/20 · openalex publication_date 2001/09/20 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We consider the high-energy behaviour of processes involving Kaluza-Klein (KK) gravitons of weak-scale string theories. We discuss how form-factors derived within string theory modify the couplings of KK gravitons and thereby lead to an exponential fall-off of cross sections in the high-energy limit. Further, we point out that the assumption of Regge behaviour for a scattering amplitude in the high energy limit, T∝ s^α(t), combined with a linear growth of the total cross-section, σ_tot(s)∝ s, violates elastic unitarity. Regge behaviour leads to a stringent bound on the growth of the total cross-section, \stot (s) ≤ 32πα' ln(s/s₀).

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