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Advances in High Energy Physics, 2011 We compute one-loop threshold corrections toℛ4terms inN=5,6supergravity vacua of Type II superstrings. We then discuss nonperturbative corrections generated by asymmetric D-brane instantons. Finally we derive generating functions for MHV amplitudes at tree level inN=5,6supergravities.
Massimo Bianchi
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Analytics of type IIB flux vacua and their mass spectra
Journal of High Energy Physics, 2023 We analyze the tree-level potential of type IIB flux compactifications in warped Calabi-Yau orientifolds, in regions of weak coupling and moderately large complex structure.
Thibaut Coudarchet +3 more
doaj +1 more source
Fake supersymmetry with tadpole potentials
Journal of High Energy Physics, 2023 We study tadpole potentials of non-supersymmetric strings, resorting to a first-order formalism known in the literature as fake supersymmetry. We present a detailed analysis for vacua with only gravity and the dilaton, displaying the obstructions that ...
Salvatore Raucci
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The convex hull swampland distance conjecture and bounds on non-geodesics
Journal of High Energy Physics, 2021 The Swampland Distance Conjecture (SDC) restricts the geodesic distances that scalars can traverse in effective field theories as they approach points at infinite distance in moduli space.
José Calderón-Infante +2 more
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On the Role of Torsion and Higher Forms in Off‐Shell Supergravity
Fortschritte der Physik, Volume 71, Issue 8-9, September 2023., 2023 Abstract The presence of a nonvanishing totally antisymmetric (super)torsion, equivalent to an axial vector, and higher forms in the “new minimal” and “old minimal” off‐shell formulations of N=1$\mathcal {N}=1$, D=4$D=4$ supergravity is elaborated. The geometric superspace approach and study both the geometric Lagrangian and the off‐shell closure of ...
Lucrezia Ravera
wiley +1 more source
Seeking de Sitter vacua in the string landscape [PDF]
Proceedings of Corfu Summer Institute 2022 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2022), 2023 In this report, we present a concise review on the various moduli stabilisation schemes proposed in the context of type IIB superstring compactifications using Calabi-Yau orientifolds.
G. Leontaris, P. Shukla
semanticscholar +1 more source
Enhancement of Out‐of‐Plane Spin–Orbit Torque by Interfacial Modification
Advanced Materials, Volume 35, Issue 12, March 23, 2023., 2023 The oxidation in CuPt/ferromagnet interface is found to be able to enhance the out‐of‐plane (OOP) torque and associated spin–orbit torque (SOT) switching efficiency with remaining threefold rotational symmetry. The enhancement is independent of the device shapes, magnetic materials, or magnetization easy axis.
Tieyang Zhao +11 more
wiley +1 more source
On K3-fibred LARGE Volume Scenario with de Sitter vacua from anti-D3-branes [PDF]
Journal of High Energy Physics, 2022 In the context of type IIB superstring compactifications on K3-fibred (weak) Swiss-cheese Calabi Yau (CY) orientifolds, we consider the realisation of de Sitter vacua obtained through the introduction of an D 3 ¯ $$ \overline{D3} $$ -brane at the tip of ...
Shehu S. Abdussalam +2 more
semanticscholar +1 more source
Mass Hierarchies and Quantum Gravity Constraints in DKMM‐refined KKLT
Fortschritte der Physik, Volume 71, Issue 1, January 2023., 2023 Abstract We carefully revisit the mass hierarchies for the KKLT scenario with an uplift term from an anti D3‐brane in a strongly warped throat. First, we derive the bound resulting from what is usually termed “the throat fitting into the bulk” directly from the Klebanov‐Strassler geometry.
Ralph Blumenhagen +2 more
wiley +1 more source
Inflation, gravity mediated supersymmetry breaking, and de Sitter vacua in supergravity with a Kähler-invariant Fayet-Iliopoulos term [PDF]
Physical Review D, 2021 We use a new mechanism for generating a Fayet-Iliopoulos term in supergravity, which is not associated to an R symmetry, to construct a semi-realistic theory of slow-roll inflation for a theory with the same K¨ahler potential and superpotential as the ...
Hun Jang, M. Porrati
semanticscholar +1 more source