Moduli dependence of string loop corrections to gauge coupling constants

Dixon, Lance J.; Kaplunovsky, Vadim S.; Louis, Jan

doi:10.1016/0550-3213(91)90490-o

Cited by 676 publications

(1,273 citation statements)

References 48 publications

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“…String threshold effects have been computed in the heterotic string case in [2,3,4,5,6] and in type I case in [8]. Before proceeding with a field theory investigation of these effects, we quote these well known results for later comparison and for establishing our notations/conventions.…”

Section: Thresholds Results From String Theorymentioning

confidence: 99%

String threshold corrections from field theory

Ghilencea

Nibbelink

2002

Nuclear Physics B

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A field theory approach to summing threshold effects to the gauge couplings in a two-torus compactification is presented and the link with the (heterotic) string calculation is carefully investigated. We analyse whether the complete UV behaviour of the theory may be described on pure field theory grounds, as due to momentum modes only, and address the role of the winding modes, not included by the field theory approach. "Nondecoupling" effects in the low energy limit, due to a small dimension are discussed. The role of modular invariance in ensuring a finite (heterotic) string result is addressed.

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Section: Thresholds Results From String Theorymentioning

confidence: 99%

String threshold corrections from field theory

Ghilencea

Nibbelink

2002

Nuclear Physics B

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“…The combined variation of the contribution of the massless fermions and the CP-odd thresholds under discrete T-duality transformations is non-zero. There is howevere a universal GS counterterm that cancels the left-over discrete anomaly [24]. Worldsheet modular invariance at one-loop thus guarantees the absence of target space modular anomalies.…”

Section: Tadpoles With I = 0 and Anomalous Amplitudesmentioning

confidence: 99%

“…internal sectors with I i = 0. In N = 1 supersymmetric compactifications, these CP-odd threshold corrections are anomalous in that they violate an integrability condition [24]. This violation is not renormalized beyond one-loop [25].…”

Section: Tadpoles With I = 0 and Anomalous Amplitudesmentioning

confidence: 99%

Anomalies and tadpoles

Bianchi

Morales

2000

J. High Energy Phys.

102

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We show that massless RR tadpoles in vacuum configurations with open and unoriented strings are always related to anomalies. RR tadpoles arising from sectors of the internal SCFT with non-vanishing Witten index are in one-to-one correspondence with conventional irreducible anomalies. The anomalous content of the remaining RR tadpoles can be disclosed by considering anomalous amplitudes with higher numbers of external legs. We then provide an explicit parametrization of the anomaly polynomial in terms of the boundary reflection coefficients, i.e. one-point functions of massless RR fields on the disk. After factorization of the reducible anomaly, we extract the relevant WZ couplings in the effective lagrangians.

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“…This integral can be computed using the by-now standard techniques of [40,36,27,28]. The final result of the integration is [26],…”

Section: Elliptic Genera and Automorphic Formsmentioning

confidence: 99%