Results 21 to 30 of about 8,027 (168)
Hidden Sectors from Multiple Line Bundles for the B−L$B-L$ MSSM
Fortschritte der Physik, Volume 70, Issue 7-8, August 2022., 2022 Abstract We give a formalism for constructing hidden sector bundles as extensions of sums of line bundles in heterotic M‐theory. Although this construction is generic, we present it within the context of the specific Schoen threefold that leads to the physically realistic B−L$B-L$ MSSM model.
Anthony Ashmore +2 more
wiley +1 more source
The cosmological constant is probably still zero
Journal of High Energy Physics, 2023 We consider a wide class of four-dimensional effective field theories in which gravity is coupled to multiple four-forms and their dual scalar fields, with membrane sources charged under the corresponding three-form potentials.
Yang Liu +2 more
doaj +1 more source
Evolving Heterotic Gauge Backgrounds: Genetic Algorithms versus Reinforcement Learning
Fortschritte der Physik, Volume 70, Issue 5, May 2022., 2022 Abstract The immensity of the string landscape and the difficulty of identifying solutions that match the observed features of particle physics have raised serious questions about the predictive power of string theory. Modern methods of optimisation and search can, however, significantly improve the prospects of constructing the standard model in ...
Steven Abel +3 more
wiley +1 more source
Quintessence and the Swampland: The Numerically Controlled Regime of Moduli Space
Fortschritte der Physik, Volume 70, Issue 4, April 2022., 2022 Abstract We provide a detailed discussion of the main theoretical and phenomenological challenges of quintessence model building in any numerically controlled regime of the moduli space of string theory. We argue that a working quintessence model requires a leading order non‐supersymmetric (near) Minkowski vacuum with an axionic flat direction.
Michele Cicoli +3 more
wiley +1 more source
String (Gravi)photons, “Dark Brane Photons”, Holography and the Hypercharge Portal
Fortschritte der Physik, Volume 69, Issue 6, June 2021., 2021 Abstract The mixing of graviphotons and dark brane photons to the Standard Model hypercharge is analyzed in full generality, in weakly‐coupled string theory. Both the direct mixing as well as effective terms that provide mixing after inclusion of SM corrections are estimated to lowest order.
P. Anastasopoulos +3 more
wiley +1 more source
On the Interpretation of Nonresonant Phenomena at Colliders
Advances in High Energy Physics, Volume 2021, Issue 1, 2021., 2021 With null results in resonance searches at the LHC, the physics potential focus is now shifting towards the interpretation of nonresonant phenomena. An example of such shift is the increased popularity of the EFT programme. We can embark on such programme owing to the good integrated luminosity and an excellent understanding of the detectors, which ...
Miguel G. Folgado +2 more
wiley +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
openaire +2 more sources
, 2007 We analyse the dynamics of a probe D3-(anti-)brane propagating in a warped string compactification, making use of the Dirac-Born-Infeld action approximation. We also examine the time dependent expansion of such moving branes from the ``mirage cosmology''
Easson, Damien +3 more
core +2 more sources