1996
DOI: 10.1002/prop.2190440612
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Duality between heterotic and type I superstring theories and effective actions

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Cited by 2 publications
(2 citation statements)
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“…For simplicity we will focus here on the four-point amplitudes of the (0,16) vectors, referring to [20] for details on the other gauge fields. There are several arguments that support the fact that these F 4 couplings are non-renormalized [29,30,31,15] in the heterotic string beyond one-loop for D ≥ 4. Firstly, in ten dimensions these terms are related by supersymmetry to CP-odd couplings such as B ∧ TrF 4 , which should receive no corrections beyond one-loop for anomaly cancellation.…”
Section: Heterotic and Iia Moduli Spaces And Trialitymentioning
confidence: 99%
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“…For simplicity we will focus here on the four-point amplitudes of the (0,16) vectors, referring to [20] for details on the other gauge fields. There are several arguments that support the fact that these F 4 couplings are non-renormalized [29,30,31,15] in the heterotic string beyond one-loop for D ≥ 4. Firstly, in ten dimensions these terms are related by supersymmetry to CP-odd couplings such as B ∧ TrF 4 , which should receive no corrections beyond one-loop for anomaly cancellation.…”
Section: Heterotic and Iia Moduli Spaces And Trialitymentioning
confidence: 99%
“…For the non-degenerate orbit, the integral is dominated by a saddle point of the same form as in (27), (28), with the two torus metric g replaced by the non-perturbative fourtorus metric. Then the final integral can be expressed again in terms of the K 3=2 ð<S cl Þ Bessel function as in (30), where <S cl is exactly of the same form as in (29), with the distinction that all inner products of p; q vectors are taken with the metric G 4 defined in (47). In particular, setting m i ¼ n i ¼ 0 and switching on one charge at a time for simplicity, we identify these non-perturbative effects as coming from NS5-brane instantons (32) as found already in D ¼ 4.…”
mentioning
confidence: 99%