Results 41 to 50 of about 179 (141)
Moduli stabilisation and the statistics of axion physics in the landscape
Journal of High Energy Physics, 2021 String theory realisations of the QCD axion are often said to belong to the anthropic window where the decay constant is around the GUT scale and the initial misalignment angle has to be tuned close to zero.
Igor Broeckel +4 more
doaj +1 more source
Explore and Exploit with Heterotic Line Bundle Models
Fortschritte der Physik, Volume 68, Issue 5, May 2020., 2020 Deep reinforcement learning is used to explore a class of heterotic SU(5) GUT models constructed from line bundle sums over Complete Intersection Calabi Yau (CICY) manifolds. Several experiments are performed where A3C agents are trained to search for such models. These agents significantly outperform random exploration, in the most favourable settings
M. Larfors, R. Schneider
wiley +1 more source
The Nelson‐Seiberg Theorem Generalized with Nonpolynomial Superpotentials
Advances in High Energy Physics, Volume 2020, Issue 1, 2020., 2020 The Nelson‐Seiberg theorem relates R‐symmetries to F‐term supersymmetry breaking and provides a guiding rule for new physics model building beyond the Standard Model. A revision of the theorem gives a necessary and sufficient condition to supersymmetry breaking in models with polynomial superpotentials.
Zhengyi Li +2 more
wiley +1 more source
LHC SUSY and WIMP dark matter searches confront the string theory landscape
Journal of High Energy Physics, 2019 The string theory landscape of vacua solutions provides physicists with some understanding as to the magnitude of the cosmological constant. Similar reasoning can be applied to the magnitude of the soft SUSY breaking terms in supersymmetric models of ...
Howard Baer +4 more
doaj +1 more source
Naturalness and dark matter in a realistic intersecting D6-brane model
Journal of High Energy Physics, 2018 We revisit a three-family Pati-Salam model with a realistic phenomenology from intersecting D6-branes in Type IIA string theory compactified on a T 6 /(ℤ2 × ℤ2) orientifold, and study its naturalness in view of the current LHC and dark matter searches ...
Waqas Ahmed +5 more
doaj +1 more source
Journal of High Energy Physics, 2021 In this paper, we want to emphasize the pivotal role played by strings in the model realizing de Sitter using an expanding bubble, proposed and subsequently developed in [1–3].
Souvik Banerjee +2 more
doaj +1 more source
Naturalness in D-brane inspired models
Journal of High Energy Physics, 2019 We examine the naturalness of the D-brane inspired model constructed in flipped SU(5) supplemented with vector-like particles at the TeV scale, dubbed flippons.
Ron De Benedetti +3 more
doaj +1 more source
Dark bubbles: decorating the wall
Journal of High Energy Physics, 2020 Motivated by the difficulty of constructing de Sitter vacua in string theory, a new approach was proposed in arXiv:1807.01570 and arXiv:1907.04268 , where four dimensional de Sitter space was realized as the effective cosmology, with matter and radiation,
Souvik Banerjee +2 more
doaj +1 more source
FTheoryTools: Advancing Computational Capabilities for F‐Theory Research
Fortschritte der Physik, Volume 74, Issue 1, January 2026.Abstract A primary goal of string phenomenology is to identify realistic four‐dimensional physics within the landscape of string theory solutions. In F‐theory, such solutions are encoded in the geometry of singular elliptic fibrations, whose study often requires particularly challenging and cumbersome computations.
Martin Bies +2 more
wiley +1 more source
One-loop phenomenology in brane models [PDF]
, 2005 Particular examples of one-loop string effects are explored in the context of brane-based realizations of the Standard Model. We firstly examine the consequences of a phenomenon known as Kinetic Mixing, which couples hidden U(1) gauge factors to visible ...
Schofield, Ben
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