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- W2079776937 abstract "One-loop amplitudes of O ( N ) open superstring with emission of massive bosons are studied. Divergences appearing at λ= 0 (λ: the overall Teichmüller parameter) are shown to be canceled if N = 32 just as in the massless case. We explicitly evaluate the two-point on-shell amplitudes for all the levels of bosons lying on the leading ( m2 = 2 l , J = l + 1, m : mass J : spin l : level number of an excited state) and the next-to-leading ( m2 = 2 l , J = l ) Regge trajectories and observe that they are nonvanishing even at N = 32. This implies that O (32) open superstring one-loop amplitudes with massive bosons generally suffer from external-line divergences. Further the obtained expressions of on-shell self-energies (mass shifts δ m2 ( l )) seem to have nontrivial dependences on l (being not proportional to l ), although mass degeneracies remain. This strongly suggests that the Regge trajectories from a set of parallel polygonal lines at one-loop level so that the mass shifts cannot be absorbed by the shift of the slope parameter. The divergences would have to be cured by the vertex operator renormalizations at very excited level." @default.
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- W2079776937 date "1988-01-01" @default.
- W2079776937 modified "2023-09-27" @default.
- W2079776937 title "One-Loop Mass Shifts in O(32) Open Superstring Theory" @default.
- W2079776937 doi "https://doi.org/10.1143/ptp.79.189" @default.
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