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A worldsheet approach to 𝒩 = 1 heterotic flux backgrounds
Heterotic backgrounds with torsion preserving minimal supersymmetry in four dimensions can be obtained as orbifolds of principal T 2 bundles over K 3....
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Heterotic quantum cohomology
It is believed, but not demonstrated, that the large radius massless spectrum of a heterotic string theory compactified to four-dimensional Minkowski...
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Emergent strings, duality and weak coupling limits for two-form fields
We systematically analyse weak coupling limits for 2-form tensor fields in the presence of gravity. Such limits are significant for testing various...
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Global anomalies & bordism of non-supersymmetric strings
The three tachyon-free non-supersymmetric string theories in ten dimensions provide a handle on quantum gravity away from the supersymmetric...
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Superstrings on Penrose limits of AdS7 solutions
We consider the Penrose limit of AdS 7 solutions of massive Type IIA supergravity. The resulting pp-wave geometry is supported by RR and NSNS fields....
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Blowup equations for little strings
We propose blowup equations for 6d little string theories which generalize Nakajima-Yoshioka’s blowup equations for the 4d/5d instanton partition...
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Dark baryon from pure Yang-Mills theory and its GW signature from cosmic strings
We point out that SO(2 N ) pure Yang-Mills theory provides a candidate for dark matter (DM) without the explicit need to impose any additional...
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Heterotic Kerr-Schild Double Field Theory and its double Yang-Mills formulation
We present a formulation of heterotic Double Field Theory (DFT), where the fundamental fields are in O ( D, D ) representations. The theory is obtained...
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Exploring β-symmetry in heterotic theory at order α′ with boundary term
This paper investigates the β -symmetry of the heterotic string theory at order α ′ in the context of open spacetime manifolds. Our analysis reveals...
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Four-derivative Yang-Mills couplings in heterotic theory through T-duality
This study delves into the dimensional reduction of the classical effective action of heterotic string theory on a circle, along with its T-duality...
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B-RNS-GSS heterotic string in curved backgrounds
The recently established B-RNS-GSS formalism is extended for the description of the heterotic superstring in curved backgrounds. We propose a...
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Scattering three closed strings off a Dp-brane in pure spinor formalism
We compute the disk amplitude of three closed strings in the pure spinor formalism. Among others, this amplitude probes tree-level gravitational...
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Freezing of gauge symmetries in the heterotic string on T4
We derive a map relating the gauge symmetry groups of heterotic strings on T 4 to other components of the moduli space with rank reduction. This...
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Massive ambitwistor-strings; twistorial models
Ambitwistor-strings are chiral strings whose targets are spaces of complex massless particles, and whose correlation functions directly lead to...
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Non-extremal, α′-corrected black holes in 5-dimensional heterotic superstring theory
We compute the first-order α ′ corrections of the non-extremal Strominger-Vafa black hole and its non-supersymmetric counterparts in the framework of...
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Open F-branes
We include in F-theory, through open Type I F-theory branes (F-branes), string theories with N = 1 supersymmetry, both Type I and heterotic. Type I...
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Higher-derivative heterotic Double Field Theory and classical double copy
The generalized Kerr-Schild ansatz (GKSA) is a powerful tool for constructing exact solutions in Double Field Theory (DFT). In this paper we focus in...
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The asymptotic Weak Gravity Conjecture for open strings
We investigate the asymptotic Tower Weak Gravity Conjecture in weak coupling limits of open string theories with minimal supersymmetry in four...