47 citations · 148 across the 14 of their papers we have counts for
15 papers
Automorphic Structures of Heterotic Vacua
Jacob M. Leedom, Nicole Righi, Alexander Westphal
We study moduli stabilization in 4D effective field theories with Sp(4,) self-duality inspired by heterotic orbifold compactifications with Wilson lines. The target-spa…
The COSMIC WISPers White Paper: The physics case for Weakly Interacting Slim Particles
Ariel Arza, Deniz Aybas, Shyam Balaji +124
Axions and other very weakly interacting slim particles (WISPs), with masses below 1 GeV, arise naturally in many extensions of the Standard Model of particle physics. In particula…
Axions at the meV Crossroads: Theory, Cosmology, Astrophysics, and Experiments
Michele Cicoli, Francesco D'Eramo, Luca Di Luzio +18
The meV mass range has emerged as a focal point in axion physics, where advances in theory, cosmology, astrophysics, and experimental techniques converge. Axions in this mass range…
Exploring the Dark Universe: A European Strategy for Axions and other WISPs Discovery
Deniz Aybas, Francesca Calore, Michele Cicoli +17
Axions and other very weakly interacting slim (with 1 GeV) particles (WISPs) are a common feature of several extensions of the Standard Model of Particle Physics. The search…
On (de Sitter) Vacua in Heterotic String Theory
Nicole Righi
Heterotic toroidal orbifolds are a powerful framework for testing our understanding of string vacua. We review recent advances in heterotic model building, from constructing new va…
Fuzzy Axions and Associated Relics
Elijah Sheridan, Federico Carta, Naomi Gendler +6
We study fuzzy axion dark matter in type IIB string theory, for axions descending from the Ramond-Ramond four-form in compactifications on orientifolds of Calabi-Yau hypersurfaces.…
Preheating Axions in String Cosmology
Jacob M. Leedom, Margherita Putti, Nicole Righi +1
Certain inflationary models can feature periods of preheating - an era preceding reheating during which parametric resonance triggers an exponential production of bosons. This non-…
Open Strings and Heterotic Instantons
Rafael Álvarez-García, Christian Kneißl, Jacob M. Leedom +1
Motivated by closed string perturbation theory arguments by S. Shenker, we consider non-perturbative effects of characteristic strength , with th…
Axion Theory and Model Building
Kiwoon Choi, Nicole Righi
Axions are light pseudoscalar bosons postulated with many motivations in particle physics and cosmology, including the strong CP problem and the dark matter in our Universe. In thi…
Heterotic de Sitter Beyond Modular Symmetry
Jacob M. Leedom, Nicole Righi, Alexander Westphal
We study the vacua of heterotic toroidal orbifolds using effective theories consisting of an overall Kähler modulus, the dilaton, and non-perturbative corrections to both the…
Axionic Festina Lente
Veronica Guidetti, Nicole Righi, Victoria Venken +1
The swampland conjecture known as Festina Lente (FL) imposes a lower bound on the mass of all charged particles in a quasi-de Sitter space. In this paper, we propose the aFL (axion…
Fuzzy Dark Matter Candidates from String Theory
Michele Cicoli, Veronica Guidetti, Nicole Righi +1
String theory has been claimed to give rise to natural fuzzy dark matter candidates in the form of ultralight axions. In this paper we revisit this claim by a detailed study of how…
Thraxions: Towards Full String Models
Federico Carta, Alessandro Mininno, Nicole Righi +1
We elucidate various aspects of the physics of thraxions, ultra-light axions arising at Klebanov-Strassler multi-throats in the compactification space of IIB superstring theory. We…
Gopakumar-Vafa Hierarchies in Winding Inflation and Uplifts
Federico Carta, Alessandro Mininno, Nicole Righi +1
We propose a combined mechanism to realize both winding inflation and de Sitter uplifts. We realize the necessary structure of competing terms in the scalar potential not via tunin…
Harmonic Hybrid Inflation
Federico Carta, Nicole Righi, Yvette Welling +1
We present a mechanism for realizing hybrid inflation using two axion fields with a purely non-perturbatively generated scalar potential. The structure of scalar potential is highl…