Dice Question Streamline Icon: https://streamlinehq.com

Allowedness of O6-plane singularities in localized DGKT-type setups

Ascertain whether the singularities arising at orientifold six-plane loci in localized type IIA compactifications with O6-planes, such as DGKT-inspired models, are of an allowed type within string theory.

Information Square Streamline Icon: https://streamlinehq.com

Background

Localized treatments of O6-planes in type IIA compactifications (e.g., DGKT-type scenarios) still produce singularities at the O6-plane loci. Whether these singularities are acceptable within string theory is not settled.

Clarifying the status of these singularities is essential for validating local (non-smeared) constructions that aim to realize scale separation and controlled compactifications, and it bears on the legitimacy of lifting such setups to M-theory.

References

Even though a local treatment of the O-planes in the DGKT setting has been realised to a certain extent, they still render singularities at their O-plane loci. It is not well-understood whether these singularities are of the allowed type in string theory .

— Weak $G_2$-manifolds and scale separation in M-theory from type IIA backgrounds (2408.16609 - Hemelryck, 29 Aug 2024) in Section 1, Introduction