Heterotic instanton superpotentials from complete intersection Calabi-Yau manifolds
- Univ. of Western Australia, Crawley, WA (Australia). School of Physics and Astronomy
- Univ. of Oxford (United Kingdom). Rudolf Peierls Centre for Theoretical Physics
- Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Physics and Astronomy
We study Pfaffians that appear in non-perturbative superpotential terms arising from worldsheet instantons in heterotic theories. A result by Beasley and Witten shows that these instanton contributions cancel among curves within a given homology class for Calabi-Yau manifolds that can be described as hypersurfaces or complete intersections in projective or toric ambient spaces. We provide a prescription that identifies all $$\mathbb{P}$$1 curves in certain homology classes of complete intersection Calabi-Yau manifolds in products of projective spaces (CICYs) and cross-check our results by a comparison with the genus zero Gromov-Witten invariants. We then use this construction to study instanton superpotentials on those manifolds and their quotients. We identify a non-toric quotient of a non-favorable CICY with a single genus zero curve in a certain homology class, so that a cancellation à la Beasley-Witten is not possible. In another example, we study a non-toric quotient of a favorable CICY and check that the superpotential still vanishes. From this and related examples, we conjecture that the Beasley-Witten cancellation result can be extended to toric and non-toric quotients of CICYs, but can be avoided if the CICY is non-favorable.
- Research Organization:
- Univ. of Pennsylvania, Philadelphia, PA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- SC0007901
- OSTI ID:
- 1505205
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2017, Issue 10; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Non-vanishing heterotic superpotentials on elliptic fibrations
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journal | September 2018 |
Fibrations in CICY threefolds
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journal | October 2017 |
Fibrations in CICY Threefolds | text | January 2017 |
Non-vanishing Heterotic Superpotentials on Elliptic Fibrations | text | January 2018 |
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