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X-WR-CALNAME:Department of Theoretical Physics
X-ORIGINAL-URL:https://web-f1.ijs.si
X-WR-CALDESC:Events for Department of Theoretical Physics
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TZID:Europe/Ljubljana
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DTSTART:20240331T010000
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DTSTART;TZID=Europe/Ljubljana:20240314T140000
DTEND;TZID=Europe/Ljubljana:20240314T153000
DTSTAMP:20260425T020140
CREATED:20231215T003726Z
LAST-MODIFIED:20240307T213946Z
UID:17885-1710424800-1710430200@web-f1.ijs.si
SUMMARY:Mojca Krajnc (TBA)
DESCRIPTION:Speakers: Mojca Krajnc (Biotechnical Faculty)\nhttps://indico.ijs.si/event/1778/
URL:https://web-f1.ijs.si/event/mojca-krajnc-tba/
LOCATION:Seminar room of physics (106) (IJS)
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BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240319T140000
DTEND;TZID=Europe/Ljubljana:20240319T150000
DTSTAMP:20260425T020140
CREATED:20240301T121234Z
LAST-MODIFIED:20240319T133334Z
UID:20234-1710856800-1710860400@web-f1.ijs.si
SUMMARY:Marco Gorghetto: Early vs late string networks from a minimal QCD Axion
DESCRIPTION:We propose a new regime of minimal QCD axion dark matter that lies between the pre- and post-inflationary scenarios\, such that the Peccei-Quinn (PQ) symmetry is restored only on sufficiently large spatial scales. This leads to a novel cosmological evolution\, in which strings and domain walls re-enter the horizon and annihilate later than in the ordinary post-inflationary regime\, possibly even after the QCD crossover. Such dynamics can occur if the PQ symmetry is restored by inflationary fluctuations\, i.e. the Hubble parameter during inflation $H_I$ is larger than the PQ breaking scale $f_a$\, but it is not thermally restored afterwards. Solving the Fokker-Planck equation\, we estimate the number of inflationary e-folds required for the PQ symmetry to be\, on average\, restored. Moreover\, we show that\, in the large parts of parameter space where the radial mode is displaced from the minimum by de Sitter fluctuations\, a string network forms due to the radial mode oscillating over the top of its potential after inflation. In both cases we identify order one ranges in $H_I/f_a$ and in the quartic coupling $lambda$ of the PQ potential that lead to the late-string dynamics. In this regime the cosmological dark matter abundance can be reproduced for axion decay constants as low as the astrophysical constraint 𝒪$(10^8)$ GeV\, corresponding to axion masses up to $10^{-2}$ eV\, and with miniclusters with masses as large as 𝒪(10) solar masses.\nhttps://indico.ijs.si/event/1997/
URL:https://web-f1.ijs.si/event/marco-gorghetto-early-vs-late-string-networks-from-a-minimal-qcd-axion/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
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DTSTART;TZID=Europe/Ljubljana:20240328T140000
DTEND;TZID=Europe/Ljubljana:20240328T150000
DTSTAMP:20260425T020140
CREATED:20230927T154646Z
LAST-MODIFIED:20240312T103046Z
UID:15095-1711634400-1711638000@web-f1.ijs.si
SUMMARY:"Dynamics of Ribonucleoprotein Assembly in Time and Space"
DESCRIPTION:Speakers: Miha Modic (National Institute of Chemistry)\nSuccessful embryo implantation induces rapid morphological progression from rosette to lumen and then to gastrulation\, which is closely coordinated with cell fate transition. By integrating machine learning\, metabolic RNA sequencing\, iCLIP\, and proteomics of the protein-RNA interactome with embryology\, I will present a blueprint for understanding how multilayered molecular networks coordinate developmental transitions. I will highlight three studies that demonstrate how cross-regulatory molecular logic ensures the robustness of developmental signalling pathways to rewire ribonucleoprotein assembly to drive cell fate transitions (Modic et al.\, 2023)\, important for the onset of gastrulation (Modic et al.\, 2019) and embryonic morphogenesis (Modic & van Genderen et al\, in resubmission; Modic et al.\, Biorxiv 2021).\nhttps://indico.ijs.si/event/1799/
URL:https://web-f1.ijs.si/event/poised-pabp-rna-hubs-implement-signal-dependent-mrna-decay-in-development/
LOCATION:Seminar room of physics (106) (IJS)
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