Results 21 to 30 of about 556 (164)
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
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D-branes at Singularities and String Phenomenology
Nuclear Physics B - Proceedings Supplements, 2007 In these notes we give an introduction to some of the concepts involved in constructing SM-like gauge theories in systems of branes at singularities of CY manifolds. These notes are an expanded version of lectures given by Herman Verlinde at the Cargese 2006 Summer School.
Malyshev, Dmitry, Verlinde, Herman
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Curvature corrections to KPV: do we need deep throats?
Journal of High Energy Physics, 2022 We consider α′2 curvature corrections to the action of an NS5-brane which plays the key role in the metastability analysis of warped anti-D3-brane uplifts by Kachru, Pearson and Verlinde (KPV). Such corrections can dramatically alter the KPV analysis. We
Arthur Hebecker +2 more
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The complete search for the supersymmetric Pati-Salam models from intersecting D6-branes
Journal of High Energy Physics, 2022 We construct a systematic method to build all the possible three-family N $$ \mathcal{N} $$ = 1 supersymmetric Pati-Salam models from Type IIA orientifolds on 𝕋6 /(ℤ2 × ℤ2) with intersecting D6-branes, in which the SU(4) C × SU(2) L × SU(2) R gauge ...
Weikun He, Tianjun Li, Rui Sun
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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
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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
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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
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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
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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
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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
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