2015/08/31 by Massimo Bianchi, Dario Consoli
Physics and Astronomy · #Black Holes and Theoretical Physics #Boson #Factorization #Limiting #Massless particle #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Realization (probability) #Superstring theory #Supersymmetry #Vector boson #hep-th
paper · pdf · doi:10.1007/jhep01(2016)043
published as JHEP 1601 (2016) 043 · 38 pages plus appendices
openalex publication_date 2016/01/01 · arxiv created 2016/03/15 · arxiv updated 2016/03/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We show that 4-point vector boson one-loop amplitudes, computed in [1] in the RNS formalism, around vacuum configurations with open unoriented strings, preserving at least N=1 SUSY in D = 4, satisfy the correct supersymmetry Ward identities, in that they vanish for non MHV configurations (++++) and (−+++). In the MHV case (−−++) we drastically simplify their expressions. We then study factorisation and the limiting IR and UV behaviours and find some unexpected results. In particular no massless poles are exposed at generic values of the modular parameter. Relying on the supersymmetric properties of our bosonic amplitudes, we extend them to manifestly supersymmetric super-amplitudes and compare our results with those obtained in the D = 4 hybrid formalism, pointing out difficulties in reconciling the two approaches for contributions from N=1,2 sectors.