2009/08/31 by Dmitri V. Gal'tsov, D. V. Gal'Tsov, Georgios Kofinas +3 · 28 citations
Physics and Astronomy · #Atomic physics #Black Holes and Theoretical Physics #Bremsstrahlung #Cosmology and Gravitation Theories #Electron #Gravitation #Lambda #Lorentz factor #Lorentz transformation #Nuclear physics #Pair production #Particle physics #Physics #Production (economics) #Pulsars and Gravitational Waves Research #Quantum mechanics #RADIUS #Schwarzschild radius #gr-qc #hep-ex #hep-ph #hep-th
paper · pdf · open access · doi:10.1016/j.physletb.2009.12.042
published in Physics Letters B 683(4-5), 331-334 (Elsevier BV) · 4 pages, revtex 4. The discussion section is changed to better clarify the region of validity of our calculation. The physical conclusions and the abstract are modified accordingly. A few more references added. We just added the preprint number CCTP-2010-18
openalex publication_date 2009/12/30 · arxiv created 2010/12/16 · arxiv updated 2010/12/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Classical gravitational bremsstrahlung in particle collisions at transplanckian energies is studied in \mathcal M4× \mathcal Td. The radiation efficiency ε≡ E\rm rad/E\rm initial is computed in terms of the Schwarzschild radius rS(√(s)), the impact parameter b and the Lorentz factor γ\rm cm and found to be ε=Cd (rS/b)3d+3 γ\rm cm2d+1, larger than previous estimates by many powers of γ\rm cm≫ 1. The result is reliable for impact parameters in the overlap of rS<b<bc \rm and b>λC, with bc marking (for d≠ 0) the loss of the notion of classical trajectories and λC≡ ℏ/mc the Compton length of the scattered particles. The condition on s and m for extreme radiation damping and (presumably) no black hole production is also derived.