Xenia de la Ossa

collaborators

5 papers

hep-th2025

Local Zeta Functions of Multiparameter Calabi-Yau Threefolds from the Picard-Fuchs Equations

Philip Candelas, Xenia de la Ossa, Pyry Kuusela

The deformation approach of arXiv:2104.07816 for computing zeta functions of one-parameter Calabi-Yau threefolds is generalised to cover also multiparameter manifolds. Consideratio…

hep-th2025

Quantum aspects of heterotic $G_{2}$ systems

Xenia de la Ossa, Magdalena Larfors, Matthew Magill +1

Compactifications of the heterotic string, to first order in the $I^\pm^{'}$ expansion, on manifolds with integrable $G_{2}$ structure give rise to three-dimensional $N = 1$ supergr…

math.AG2025

Some Identities For Periods of Hulek-Verrill Threefolds

Xenia de la Ossa, Mohamed Elmi

We study the Hulek--Verrill families of Calabi--Yau threefolds. They are birationally equivalent to fibred products of elliptic surfaces, so we expect to be able to compute periods…

hep-th2025

$S W$ -algebras and strings with torsion

Xenia de la Ossa, Mateo Galdeano, Enrico Marchetto

We explore the connection between super $W$ -algebras ( $S W$ -algebras) and $G$ -structures with torsion. The former are realised as symmetry algebras of s…

hep-th2025

Classical Weight-Four L-value Ratios as Sums of Calabi--Yau Invariants

Philip Candelas, Xenia de la Ossa, Joseph McGovern

We revisit the series solutions of the attractor equations of 4d N=2 supergravities obtained by Calabi--Yau compactifications previously studied in Candelas, Kuusela, and McGovern…

Local Zeta Functions of Multiparameter Calabi-Yau Threefolds from the Picard-Fuchs Equations

Quantum aspects of heterotic G2​ systems

Some Identities For Periods of Hulek-Verrill Threefolds

SW-algebras and strings with torsion

Classical Weight-Four L-value Ratios as Sums of Calabi--Yau Invariants

Quantum aspects of heterotic $G_{2}$ systems

$S W$ -algebras and strings with torsion