2006/05/01 by Yu Nakayama, Soo-Jong Rey, Yuji Sugawara
Mathematics · Physics and Astronomy · #Amplitude #Black Holes and Theoretical Physics #Brane #Classical mechanics #Cosmology and Gravitation Theories #D-brane #Duality (order theory) #Galaxies: Formation, Evolution, Phenomena #Mathematical physics #Mathematics #Particle physics #Physics #Pure mathematics #Quantum electrodynamics #Quantum mechanics #Scattering amplitude #String (physics) #String field theory #String theory #Theoretical physics #Unitarity #Worldsheet #hep-th
paper · pdf · doi:10.1088/1126-6708/2006/08/014
published as JHEP0608:014,2006 · Latex, 28 pages, 2 figures (colored)
arxiv created 2006/05/01 · openalex publication_date 2006/08/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Investigations for decay of unstable D-brane and rolling of accelerated D-brane dynamics have revealed that various proposed prescriptions give different result for spectral amplitudes and observables. Here, we study them with particular attention to unitarity and open-closed channel duality. From "ab initio" derivation in the open string channel, both in Euclidean and Lorentzian worldsheet approaches, we find heretofore overlooked contribution to the spectral amplitudes and obervables. The contribution is fortuitously absent for decay of unstable D-brane, but is present for rolling of accelerated D-brane. We finally show that the contribution is imperative for ensuring unitarity and optical theorem at each order in string loop expansion.