Results 31 to 40 of about 319 (139)
Fortschritte der Physik, Volume 68, Issue 11-12, December 2020., 2020 Abstract We analyze to which extent the KKLT proposal for the construction of de Sitter vacua in string theory is quantitatively controlled. Our focus is on the quality of the 10d supergravity approximation. As our main finding, we uncover and quantify an issue which one may want to call the “singular‐bulk problem”.
Xin Gao +2 more
wiley +1 more source
UV Shadows in EFTs: Accidental Symmetries, Robustness and No‐Scale Supergravity
Fortschritte der Physik, Volume 68, Issue 10, October 2020., 2020 Abstract We argue that accidental approximate scaling symmetries are robust predictions of weakly coupled string vacua, and show that their interplay with supersymmetry and other (generalised) internal symmetries underlies the ubiquitous appearance of no‐scale supergravities in low‐energy 4D EFTs.
C. P. Burgess +4 more
wiley +1 more source
Predicting the Orbifold Origin of the MSSM
Fortschritte der Physik, Volume 68, Issue 5, May 2020., 2020 MSSM‐like string models from the compactification of the heterotic string on toroidal orbifolds (of the kind T6/P) have distinct phenomenological properties, like the spectrum of vector‐like exotics, the scale of supersymmetry breaking, and the existence of non‐Abelian flavor symmetries.
Erik Parr +2 more
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
On BPS World Volume, RR Couplings, and Their α′ Corrections in Type IIB
Advances in High Energy Physics, Volume 2020, Issue 1, 2020., 2020 We compute the asymmetric and symmetric correlation functions of a four‐point amplitude of a gauge field, a scalar field, and a closed string Ramond‐Ramond (RR) for different nonvanishing BPS branes. All world volume, the Taylor and pull‐back couplings, and their all‐order α′ corrections have also been explored.
Ehsan Hatefi, Torsten Asselmeyer-Maluga
wiley +1 more source
Conditions for Vacuum Instability in Holographic Theories with Dilaton Field
Advances in High Energy Physics, Volume 2020, Issue 1, 2020., 2020 We investigate the vacuum instability in the presence of dilaton field in a holographic setup. Although the dilaton is a bulk field, it leads to the vacuum instability on the boundary. We show that the whole process crucially depends on the probe brane position and as well on the radial coordinate so that the effects of dilaton scale parameter in ...
Sara Tahery +3 more
wiley +1 more source
Cobordism, singularities and the Ricci flow conjecture
Journal of High Energy Physics, 2023 In the following work, an attempt to conciliate the Ricci flow conjecture and the Cobordism conjecture, stated as refinements of the Swampland distance conjecture and of the No global symmetries conjecture respectively, is presented.
David Martín Velázquez +2 more
doaj +1 more source
Kination, meet Kasner: on the asymptotic cosmology of string compactifications
Journal of High Energy Physics, 2023 We study runaway, kination-dominated epochs in string cosmology. We show how the apparent classical decompactification runaway of the volume modulus, described by a kination epoch in the 4-dimensional EFT, can be uplifted to a classical Kasner solution ...
Fien Apers +3 more
doaj +1 more source
α′ corrections to KPV: an uplifting story
Journal of High Energy Physics, 2023 In earlier work, the effect of α′2 curvature corrections on the NS5-brane responsible for the decay of anti-D3-branes in the set-up of Kachru, Pearson, and Verlinde (KPV) was considered. We extend this analysis to include all known α′2 corrections to the
Simon Schreyer, Victoria Venken
doaj +1 more source
Journal of High Energy Physics, 2022 A supersymmetric Pati-Salam model with wrapping number equal to 5 has been constructed in Type IIA orientifolds on T 6 /(ℤ 2 × ℤ 2) with intersecting D6-branes recently.
Mudassar Sabir +3 more
doaj +1 more source