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Moving five-branes in low-energy heterotic M theory

PHYSICAL REVIEW D 64:12 (2001) ARTN 126003

Authors:

EJ Copeland, J Gray, A Lukas
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Recent Developments in Particle Physics and Cosmology

Springer Netherlands, 2001
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Scalar glueball-q(q)over-bar mixing above 1 GeV and implications for lattice QCD

EUROPEAN PHYSICAL JOURNAL C 21:3 (2001) 531-543

Authors:

FE Close, A Kirk
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The origins of quark-hadron duality: how does the square of the sum become the sum of the squares?

PHYSICS LETTERS B 509:1-2 (2001) 81-86

Authors:

FE Close, N Isgur
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SYMMETRIC VACUA IN HETEROTIC M THEORY

International Journal of Modern Physics A World Scientific Pub Co Pte Lt 15:32 (2000) 5161-5182

Authors:

ANDRÉ LUKAS, BURT A OVRUT

Abstract:

Symmetric vacua of heterotic M theory, characterized by vanishing cohomology classes of individual sources in the three-form Bianchi identity, are analyzed on smooth Calabi–Yau three-folds. We show that such vacua do not exist for elliptically fibered Calabi–Yau spaces. However, explicit examples are found for Calabi–Yau three-folds arising as intersections in both unweighted and weighted projective space. We show that such symmetric vacua can be combined with attractive phenomenological features such as three generations of quarks and leptons. Properties of the low energy effective actions associated with symmetric vacua are discussed. In particular, the gauge kinetic functions receive no perturbative threshold corrections, there are no corrections to the matter field Kähler metric and the associated five-dimensional effective theory admits flat space as its vacuum.
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