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DTSTART;TZID=Europe/Madrid:20260319T120000
DTEND;TZID=Europe/Madrid:20260319T130000
DTSTAMP:20260423T222558
CREATED:20260313T185336Z
LAST-MODIFIED:20260313T185336Z
UID:24611-1773921600-1773925200@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'Axion-Scalar Systems and Dynamical Distances'
DESCRIPTION:Strings\, Pheno and the Swampland (SPS) Journal Club  \nSpeaker: Gonzalo F. Casas (IFT) \nTitle: ‘Axion-Scalar Systems and Dynamical Distances’ \nAbstract: We study the cosmology of axion-scalar pairs\, coupled by a hyperbolic field-space metric and with a string-motivated rational scalar potential. Borrowing tools from the theory of dynamical systems\, we are able to classify all late-time trajectories and extract physical properties of the asymptotic solutions. These results suggest a Dynamical Distance Conjecture: along the physical (possibly non-geodesic) trajectories\, towers of states become exponentially light as a function of the traversed field-space distance. We further rule out possible counterexamples with wildly oscillating solutions. The considered axion-scalar systems are realized in F-theory compactifications\, where the axion-scalar pair is a complex-structure modulus and four-form fluxes induce the asymptotic potentials. We also provide a complete Hodge-theoretic classification of all one-modulus asymptotic potentials of this type.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-axion-scalar-systems-and-dynamical-distances/
CATEGORIES:Journal clubs,Scientific activities
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DTSTART;TZID=Europe/Madrid:20260319T150000
DTEND;TZID=Europe/Madrid:20260319T160000
DTSTAMP:20260423T222558
CREATED:20260119T104543Z
LAST-MODIFIED:20260310T093507Z
UID:24222-1773932400-1773936000@www.ift.uam-csic.es
SUMMARY:Seminar: 'Beyond the Minimal Axion: Robustness of Standard Predictions'
DESCRIPTION:Title: ‘Beyond the Minimal Axion: Robustness of Standard Predictions’ \nSpeaker: Sung Mook Lee (CERN) \nVenue & Time: Red Room / 15:00 \nAbstract: The QCD axion is one of the most compelling candidates for physics beyond the Standard Model\, as it can simultaneously solve the strong CP problem and account for the dark matter abundance. In the minimal single-axion framework\, especially in a post-inflationary cosmology\, the combination of axion gauge coupling quantization and axion production from string networks leads to sharp and highly predictive targets. In this talk\, we revisit these predictions in a simple but realistic setup with an additional confining dark gauge group and extra axion degrees of freedom. We will show how axion mixing and defect dynamics can modify both the coupling predictions and the relic abundance expectations through emergent features specific to multi axion scenarios\, and discuss when the standard single axion benchmarks remain reliable. This provides a useful test of what remains truly robust in extended axion theories and helps guide current experimental targets.
URL:https://www.ift.uam-csic.es/event/seminar-by-sung-mook-lee/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
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