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Title: Heterotic instanton superpotentials from complete intersection Calabi-Yau manifolds

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [3];  [2]
  1. Univ. of Western Australia, Crawley, WA (Australia). School of Physics and Astronomy
  2. Univ. of Oxford (United Kingdom). Rudolf Peierls Centre for Theoretical Physics
  3. 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
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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Cited By (4)

Non-vanishing heterotic superpotentials on elliptic fibrations journal September 2018
Fibrations in CICY threefolds journal October 2017
Fibrations in CICY Threefolds text January 2017
Non-vanishing Heterotic Superpotentials on Elliptic Fibrations text January 2018

Figures / Tables (3)


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