Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1994-05-25
Nucl.Phys. B435 (1995) 277-294
Physics
High Energy Physics
High Energy Physics - Theory
18 pages (LaTeX), G\"oteborg ITP 94-9
Scientific paper
10.1016/0550-3213(94)00502-6
Recently an algorithm was found by means of which one can calculate terms at arbitrary oscillator level in the four-Ramond vertex obtained by sewing. Here we show that this algorithm is applicable also to the case of ${\bf Z}_2$-twisted scalars and derive the full propagator for scalars on the Riemann sphere with two branch cuts. The relation to similar results previously derived in the literature by other means is discussed briefly.
Engberg Niclas
Nilsson Bengt E. W.
Westerberg Anders
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