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PRODID:-//Department of Theoretical Physics - ECPv6.5.1.5//NONSGML v1.0//EN
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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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BEGIN:VTIMEZONE
TZID:Europe/Ljubljana
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20240331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20241027T010000
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END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240201T140000
DTEND;TZID=Europe/Ljubljana:20240201T150000
DTSTAMP:20260403T220227
CREATED:20240103T100856Z
LAST-MODIFIED:20240201T132455Z
UID:18635-1706796000-1706799600@web-f1.ijs.si
SUMMARY:Fran Ivan Vrban\, "Many-body effects in microgel suspensions"
DESCRIPTION:Even though there are clear indications of many-body interactions in the dense microgel suspensions\, there is still no adequate general description of the phenomena. One possible avenue for exploration of many-body effects is the coarse-grained liquid-drop model\, where the soft matter constituents are regarded as compressible drops with a well-defined surface. The interplay between particle’s bulk and surface energy plays the key role in the system characterization\, along with the geometry constraints. In this seminar\, the general overview of the many-body interactions in field will be presented\, as well as the relevant techniques and results of the liquid-drop model.\nhttps://indico.ijs.si/event/1956/
URL:https://web-f1.ijs.si/event/fran-ivan-vrban-tba/
LOCATION:C/0-106 – Seminarska soba fizike (F5) (Jamova)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240207T140000
DTEND;TZID=Europe/Ljubljana:20240207T150000
DTSTAMP:20260403T220227
CREATED:20231110T094025Z
LAST-MODIFIED:20240207T134150Z
UID:16640-1707314400-1707318000@web-f1.ijs.si
SUMMARY:Marin Šako\, "Physics of bubble oscillations"
DESCRIPTION:Bubbles in liquids\, soft and squeezy objects made of gas and vapour\, yet so strong as to destroy any material. At first glance bubbles in water might seem like trivial objects with simple physics describing them. However\, upon further investigation one finds many interesting phenomena. In this talk I will present Rayleigh–Plesset equation\, a mathematical framework for describing bubble oscillations\, as well as an overview of some notable solutions.\nhttps://indico.ijs.si/event/1844/
URL:https://web-f1.ijs.si/event/marin-sako-tba-2/
LOCATION:C/2-X – F1 čajnica (Jamova)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240215T141500
DTEND;TZID=Europe/Ljubljana:20240215T151500
DTSTAMP:20260403T220227
CREATED:20231117T010307Z
LAST-MODIFIED:20240208T195357Z
UID:16860-1708006500-1708010100@web-f1.ijs.si
SUMMARY:"One\, two\, three\, four: simple additions of nucleic acid strands for complex functional outcomes"
DESCRIPTION:Speakers: Maja Marušič (National Institute of Chemistry)\nNucleic acids display a range of structural variations beyond the basic helical shape and Watson-Crick hydrogen bond pairing. Some of these structural variations are nuanced\, while others result in a vastly different spatial conformation. We will discuss the structural details of single-\, double-\, triple- and quadruple-stranded nucleic acids and how structural variation translates into functional diversity. What can in vitro biophysical methods reveal about the nucleic acid structure\, how can we correlate findings from diverse methods\, and when is this approach suitable and when not? Insights into these and related questions will be provided using adenine-rich DNA systems\, AT/GC repeat regions\, PNA-RNA complexes and 3′ untranslated regions of mRNA.\nhttps://indico.ijs.si/event/1769/
URL:https://web-f1.ijs.si/event/one-two-three-four-simple-additions-of-nucleic-acid-strands-for-complex-functional-outcomes/
LOCATION:Seminar room of physics (106) (IJS)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240222T140000
DTEND;TZID=Europe/Ljubljana:20240222T150000
DTSTAMP:20260403T220228
CREATED:20231201T113522Z
LAST-MODIFIED:20240208T195357Z
UID:17361-1708610400-1708614000@web-f1.ijs.si
SUMMARY:Veronika Bukina (TBA)
DESCRIPTION:https://indico.ijs.si/event/1874/
URL:https://web-f1.ijs.si/event/veronika-bukina-tba-2/
LOCATION:C/0-106 – Seminarska soba fizike (F5) (Jamova)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240229T140000
DTEND;TZID=Europe/Ljubljana:20240229T150000
DTSTAMP:20260403T220228
CREATED:20231201T113522Z
LAST-MODIFIED:20240229T132416Z
UID:17362-1709215200-1709218800@web-f1.ijs.si
SUMMARY:Urška Andrenšek\, "Thickness modulation in supported epithelial sheets"
DESCRIPTION:Surface patterns in epithelial tissues often arise due to effects of differential surface tension and elastic properties of supporting structures\, such as basal membrane and bulk elastic substrate. While we cannot clearly distinguish between surface-tension and elastic contributions only from measurement of wave-length of surface patterns\, thickness modulation of the tissue might give a better insight into the origins of specific pattern formation. Depending on magnitude of surface-tension and elastic energy contributions\, the thickness modulation can change its amplitude and phase. I will present the theoretical predictions of effects that differential surface tension\, basal membrane and elastic substrate have on surface-pattern formation and thickness modulation in mono-layered epithelial sheets.\nhttps://indico.ijs.si/event/1875/
URL:https://web-f1.ijs.si/event/urska-andrensek-tba/
LOCATION:C/0-106 – Seminarska soba fizike (F5) (Jamova)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240314T140000
DTEND;TZID=Europe/Ljubljana:20240314T153000
DTSTAMP:20260403T220228
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)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240319T140000
DTEND;TZID=Europe/Ljubljana:20240319T150000
DTSTAMP:20260403T220228
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)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240328T140000
DTEND;TZID=Europe/Ljubljana:20240328T150000
DTSTAMP:20260403T220228
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)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240404T140000
DTEND;TZID=Europe/Ljubljana:20240404T150000
DTSTAMP:20260403T220228
CREATED:20240323T012943Z
LAST-MODIFIED:20240404T125047Z
UID:22114-1712239200-1712242800@web-f1.ijs.si
SUMMARY:Fabio Staniscia\, "Line adsorption in sessile droplets"
DESCRIPTION:https://indico.ijs.si/event/2075/
URL:https://web-f1.ijs.si/event/fabio-staniscia-tba-2/
LOCATION:C/0-106 – Seminarska soba fizike (F5) (Jamova)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240411T141500
DTEND;TZID=Europe/Ljubljana:20240411T151500
DTSTAMP:20260403T220228
CREATED:20240112T004541Z
LAST-MODIFIED:20240411T130106Z
UID:18958-1712844900-1712848500@web-f1.ijs.si
SUMMARY:Boštjan Vihar\, "Developing in vitro models of human tissues"
DESCRIPTION:Speakers: Boštjan Vihar (IBV MF UM)\nThe presentation will establish basic concepts of tissue engineering\, 3D biofabrication and the development of microphysiological systems\, and provide insight into some of the work in progress at the Institute of Biomedical Sciences\, Faculty of Medicine\, University of Maribor (IBV).The development of advanced in vitro models of human tissues stands at the forefront of advancing medical sciences by developing innovative solutions to complex health issues and requires an interdisciplinary approach combining different fields such as cell and molecular biology\, biochemistry\, materials science\, additive technologies. The development process can vary substantially depending on the target tissue/application and the expected functional characteristics.At IBV different aspects of in vitro tissue model development are explored in parallel and in synergy in the hopes of obtaining new insights into the (patho)physiology of human tissues and organs and creating new ways for the treatment of complex diseases and personalized medicine.Our research activities include the cell culture of immortalized and primary cell lines\, which are also isolated and characterization in-house. In parallel\, polymer-based hydrogel formulations are developed to mimic the physico-chemical properties of native tissues and are combined with cells to form bioinks. Using extrusion-based\, microfluidics and lithographic 3D printing techniques\, tissue scaffolds and custom-made microfluidic devices are developed and integrated into microphysiological systems (organ-on-a-chip devices) which allow prolonged maturation\, continuous monitoring and functional analysis.\nhttps://indico.ijs.si/event/1866/
URL:https://web-f1.ijs.si/event/bostjan-vihar-tba/
LOCATION:Seminar room of physics (106) (IJS)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240418T140000
DTEND;TZID=Europe/Ljubljana:20240418T150000
DTSTAMP:20260403T220228
CREATED:20240323T012943Z
LAST-MODIFIED:20240408T075553Z
UID:22115-1713448800-1713452400@web-f1.ijs.si
SUMMARY:Labrini Athanasopoulou (TBA)
DESCRIPTION:https://indico.ijs.si/event/2076/
URL:https://web-f1.ijs.si/event/labrini-athanasopoulou-tba/
LOCATION:C/0-106 – Seminarska soba fizike (F5) (Jamova)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240509T140000
DTEND;TZID=Europe/Ljubljana:20240509T150000
DTSTAMP:20260403T220228
CREATED:20240313T125226Z
LAST-MODIFIED:20240509T123626Z
UID:21331-1715263200-1715266800@web-f1.ijs.si
SUMMARY:Maciej Kierkla: EFT of supercooled phase transition
DESCRIPTION:We present an analysis of the first-order supercooled phase transition associated with symmetry breaking in the early Universe in a classically scale-invariant model. We analyze the role of higher order thermal corrections for these transitions\, and to what extent they can be computed using dimensionally reduced effective field theory (3D EFT). This framework requires high temperature (HT) expansion to be valid\, which seems challenging due to the presence of supercooling. We show how to reliably use the HT expansion in dimensionally reduced theory for the calculation of bubble nucleation rate. We compare the obtained results to the results of the most common scheme based on the so-called daisy resummation. We further compute all of phase transition characteristics\, discuss various scenarios of completing the transition and predict resulting gravitational-wave spectra and their observational prospects in future experiments such as LISA.\nhttps://indico.ijs.si/event/2070/
URL:https://web-f1.ijs.si/event/maciej-kierkla/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240516T140000
DTEND;TZID=Europe/Ljubljana:20240516T150000
DTSTAMP:20260403T220228
CREATED:20240427T073727Z
LAST-MODIFIED:20240516T122650Z
UID:25080-1715868000-1715871600@web-f1.ijs.si
SUMMARY:Lorenzo Ubaldi: False Vacuum Decay From Thin to Thick Walls
DESCRIPTION:The computation of the false vacuum decay rate in the situation with nearly degenerate vacua can be performed analytically in the well known thin wall approximation. If we depart from the near degeneracy of the vacua\, the approximation quickly ceases to work. This statement is known to practitioners of the field\, but it has a caveat: it is true only if one works at the leading order of the thin wall approximation. In this talk I will describe how to organize the calculation to systematically include higher order corrections in the thin wall parameter expansion. The first few orders can be computed analytically. It is enough to include them to improve the approximation and get a very accurate estimate of the bounce action also deep into thick wall regimes\, where the vacua are far apart. I plan to also briefly discuss how to deal in these cases with the calculation of the functional determinant\, also known as the prefactor\, in order to have the full proper understanding of the vacuum decay rate. In the whole talk I will only consider flat spacetime\, without gravity.\nhttps://indico.ijs.si/event/2133/
URL:https://web-f1.ijs.si/event/lorenzo-ubaldi-false-vacuum-decay-from-thin-to-thick-walls/
LOCATION:https://uu-se.zoom.us/j/64706033081 Passcode: 107002 (Zoom)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240521T140000
DTEND;TZID=Europe/Ljubljana:20240521T150000
DTSTAMP:20260403T220228
CREATED:20240429T092123Z
LAST-MODIFIED:20240521T112538Z
UID:25290-1716300000-1716303600@web-f1.ijs.si
SUMMARY:Diego Redigolo: Dark sectors at flavor factories
DESCRIPTION:I will discuss new ideas for reporpusing current flavor experiments to hunt for dark sectors particles. \nhttps://indico.ijs.si/event/2134/
URL:https://web-f1.ijs.si/event/diego-redigolo/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240523T140000
DTEND;TZID=Europe/Ljubljana:20240523T150000
DTSTAMP:20260403T220228
CREATED:20240416T100220Z
LAST-MODIFIED:20240515T142738Z
UID:24106-1716472800-1716476400@web-f1.ijs.si
SUMMARY:Nudžeim Selimović
DESCRIPTION:https://indico.ijs.si/event/2089/
URL:https://web-f1.ijs.si/event/nudzeim-selimovic/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240523T140000
DTEND;TZID=Europe/Ljubljana:20240523T150000
DTSTAMP:20260403T220228
CREATED:20240418T101241Z
LAST-MODIFIED:20240523T123631Z
UID:24290-1716472800-1716476400@web-f1.ijs.si
SUMMARY:Gašper Lipnik\, "Force inference in epithelial tissues"
DESCRIPTION:In this work\, we explore the ways of determining the mechanical properties of epithelial tissues. Knowledge of the mechanical parameters like forces between and pressures within cells leads to a deeper understanding of the processes in these tissues. To determine these parameters\, one can perform in vivo measurements using lasers\, optical tweezers\, micropipettes etc. However\, in vivo measurements are invasive\, technically challenging and local. Thus\, it is best to use noninvasive and global methods. One theoretical approach is force inference from cell shapes and connectivity as seen in microscope images\, and here we introduce three force inference methods.\nhttps://indico.ijs.si/event/2091/
URL:https://web-f1.ijs.si/event/gasper-lipnik-force-inference-in-epithelial-tissues/
LOCATION:C/0-106 – Seminarska soba fizike (F5) (Jamova)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240528T134500
DTEND;TZID=Europe/Ljubljana:20240528T144500
DTSTAMP:20260403T220228
CREATED:20240510T110600Z
LAST-MODIFIED:20240528T114345Z
UID:26366-1716903900-1716907500@web-f1.ijs.si
SUMMARY:Innes Bigaran: Leveraging intermediate resonances to probe CP-violation at colliders
DESCRIPTION:We study the phenomenological implications of interference between tree-level contributions to decays to three-body final states. CP-violation in these decays arise via different virtualities of intermediate resonances\, and the presence of SM and/or new CP phases in a model Lagrangian. We highlight the manifestation of this CP-violating observable in the interference between SM charged-current decays and new-physics contributions to effective vector interactions in the EFT and in a UV-complete model featuring a scalar leptoquark\, $S_1$. We present a novel method for searching for CP-violating new physics effects utilising the differential cross sections of $ppto d_i ell u_ell$ decays\, with a detailed study of $ppto b tau u_tau$ simulating signal and background.\nhttps://indico.ijs.si/event/2146/
URL:https://web-f1.ijs.si/event/innes-bigaran/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240530T140000
DTEND;TZID=Europe/Ljubljana:20240530T150000
DTSTAMP:20260403T220228
CREATED:20240411T144041Z
LAST-MODIFIED:20240530T115521Z
UID:23648-1717077600-1717081200@web-f1.ijs.si
SUMMARY:Mario Reig Lopez: Testing the far UV of the Standard Model with axions
DESCRIPTION:In this talk I will discuss axion couplings to gauge bosons in 4-dimensional Grand Unified Theories and in (heterotic) String Theory. The topological nature of these couplings allows them to be matched from the UV to the IR\, and the ratio of the anomaly with photons and gluons for any axion is fixed by unification.  I will show that this implies that there is a single axion — the QCD axion — with an anomalous coupling to photons. Other light axion-like particles can couple to photons by mixing with the QCD axion\, and necessarily lie to the right of the QCD line prediction in the mass-coupling plane. As a result\, a discovery of an axion to the left of the QCD line can rule out simple GUTs and some heterotic string compactifications.Based on: 2206.07053 and future work.\nhttps://indico.ijs.si/event/2085/
URL:https://web-f1.ijs.si/event/mario-reig-lopez/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240610T120000
DTEND;TZID=Europe/Ljubljana:20240610T130000
DTSTAMP:20260403T220228
CREATED:20240506T132140Z
LAST-MODIFIED:20240610T104412Z
UID:25974-1718020800-1718024400@web-f1.ijs.si
SUMMARY:Bernat Corominas-Murtra\, "Topological transitions and cell-cell adhesion properties in development"
DESCRIPTION:Speakers: Bernat Corominas-Murtra (Karl-Franzens University Graz)\nThe developmental process implies precise but significant changes in the geometry and structure of the embryonic tissues. Recent results show that apparently minor changes in adhesion at the local level of cell-cell contacts trigger deep\, non-linear transitions in the topological organization of the whole embryonic tissue and\, in consequence\, change its material properties and facilitate geometrical deformations. Open questions remain\, like the potential existence of causal feedbacks between cell differentiation processes and the potential heterogeneity of topological patterns existing within the tissue. The results presented in this talk are based on the fundamental assumption that predictive frameworks in theoretical biology must explore the  connection between different scales of the system. In this particular case\, we use topology to establish a bridge between the system’s scales defined by i) the cell level and ii) the tissue level. This enables us to predict global\, non-trivial behaviours in tissues from the empirically feasible observables related to the mechanical properties of single cells.\nhttps://indico.ijs.si/event/2139/
URL:https://web-f1.ijs.si/event/bernat-corominas-murtra-tba/
LOCATION:Seminar room of physics (106) (IJS)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240613T141500
DTEND;TZID=Europe/Ljubljana:20240613T151500
DTSTAMP:20260403T220228
CREATED:20240506T132140Z
LAST-MODIFIED:20240611T231915Z
UID:25975-1718288100-1718291700@web-f1.ijs.si
SUMMARY:Tatyana Gavrilchenko\, "Lessons from the tracheal terminal cell: what a unicellular network can teach us about distribution network design principles"
DESCRIPTION:Speakers: Tatyana Gavrilchenko (Flatiron Institute\, NY\, USA)\nThe insect respiratory system is a network of air-filled tubes permeating the animal body\, supplying oxygen for metabolic activity and removing waste carbon dioxide. The majority of gas exchange occurs in the finest regions of the tracheal system\, the terminal cells. These cells have a unique and highly specialized tree-like structure with long thin branches\, reminiscent of neuronal arbors. While many aspects of the terminal cell are understood on a molecular level\, including the mechanisms that guide branch extension and lumen formation\, the macroscopic network features that allow for proper oxygen distribution remain mysterious. We use the Drosophila terminal cell as a model system for fundamental developmental problems of network structure and functions\, utilizing an imaging data set that fully maps the structure of over one hundred individual cells. First\, we find that scaling relations succinctly encapsulate the dynamics of growing networks\, and use the empirical scalings observed in the terminal cells to construct a minimal model of network growth that describes the system. Second\, to understand the interplay between structure and function in the trees\, we developed a model of oxygen distribution by a network embedded in a two-dimensional absorbing tissue\, driven purely by diffusion along oxygen partial pressure gradients. Our method works well on complex geometries\, including curved and branched networks that approximate the geometry of the terminal cells. These investigations offer insights into mammalian capillary networks\, which have different structural features and delivery mechanisms from terminal cells but are guided by similar developmental principles. Understanding the salient features that govern the structure of these biological networks is essential to designing synthetic vasculature\, a major step in the manufacture of artificial organs.\nhttps://indico.ijs.si/event/2138/
URL:https://web-f1.ijs.si/event/tatyana-gavrilchenko-tba/
LOCATION:Seminar room of physics (106) (IJS)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240617T140000
DTEND;TZID=Europe/Ljubljana:20240617T150000
DTSTAMP:20260403T220228
CREATED:20240502T142604Z
LAST-MODIFIED:20240617T125924Z
UID:25573-1718632800-1718636400@web-f1.ijs.si
SUMMARY:Ezequiel Alvarez: The Information frontier at the LHC
DESCRIPTION:Once we have obtained the data\, the question is how much information is encoded in it and how we can extract it. Any framework with this purpose utilizes information-besides-data and mathematical and statistical tools.  Bayesian statistics has the virtue that\, by modeling the inner structure of the data\, it allows us to inject prior information and its uncertainty as a catalyst to push out the information from the data.   The framework also possesses tools to assess the results unbiasedness and its consistency with the data.   We will show with examples at the LHC how to apply Bayesian tools in order to efficiently extract information about the physics inside.  We discuss possible applications in improving data-driven methods\, and in pp > hh > bbbb\, however the generality of the results apply to rethinking a variety of observables.  The method can exploit correlations at the event-by-event level and previously  untapped strengths such as for instance continuity and unimodality of some distributions.  We raise the question of whether there might be room for improvements in some of the current LHC analyses.\nhttps://indico.ijs.si/event/2135/
URL:https://web-f1.ijs.si/event/ezequiel-alvarez/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240626T130000
DTEND;TZID=Europe/Ljubljana:20240626T140000
DTSTAMP:20260403T220228
CREATED:20240607T162740Z
LAST-MODIFIED:20240626T110131Z
UID:29013-1719406800-1719410400@web-f1.ijs.si
SUMMARY:Martín Novoa-Brunet: NP @ High Precision beta decay
DESCRIPTION:https://indico.ijs.si/event/2166/
URL:https://web-f1.ijs.si/event/shoji-baratella-trailovic-the-standard-model-lifetime-is-slightly-shorter/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240627T140000
DTEND;TZID=Europe/Ljubljana:20240627T150000
DTSTAMP:20260403T220228
CREATED:20240415T083824Z
LAST-MODIFIED:20240627T124040Z
UID:24005-1719496800-1719500400@web-f1.ijs.si
SUMMARY:Manuel Szewc: Modeling Hadronization with Machine Learning
DESCRIPTION:A fundamental part of event generation\, hadronization is currently simulated with the help of fine-tuned empirical models. Motivated by the difficulties of these models\, in this talk I’ll present MLHAD: a proposed alternative where the empirical model is replaced by a surrogate Machine Learning-based model to be ultimately data-trainable. I’ll detail the current stage of development and discuss challenges and possible ways forward.\nhttps://indico.ijs.si/event/2088/
URL:https://web-f1.ijs.si/event/manuel-szewc/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240628T140000
DTEND;TZID=Europe/Ljubljana:20240628T150000
DTSTAMP:20260403T220228
CREATED:20240619T092342Z
LAST-MODIFIED:20240628T103014Z
UID:29998-1719583200-1719586800@web-f1.ijs.si
SUMMARY:Chandan Hati: Nonstandard Nucleon Decays
DESCRIPTION:Nucleon decays are generic predictions of many well motivated theories\, including those based on the unification of forces and supersymmetry. I will discuss how nonstandard nucleon decays offer a unique opportunity to broadly probe light new particles beyond the Standard Model with masses below few GeV\, including axion-like particles\, dark photons\, sterile neutrinos\, and scalar dark matter. Conventional searches can misinterpret and even completely miss such new physics. I will discuss a general strategy based on momenta of visible decay final states to probe these processes\, offering a rich physics program for existing and upcoming experiments such as Super-Kamiokande\, Hyper-Kamiokande\, DUNE\, and JUNO.\nhttps://indico.ijs.si/event/2173/
URL:https://web-f1.ijs.si/event/chandan-hati-nonstandard-nucleon-decays/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240711T140000
DTEND;TZID=Europe/Ljubljana:20240711T150000
DTSTAMP:20260403T220228
CREATED:20240701T133914Z
LAST-MODIFIED:20240711T113240Z
UID:30991-1720706400-1720710000@web-f1.ijs.si
SUMMARY:Luighi Leal: Correlating $0 ubetabeta$ decays and flavor observables in leptoquark models
DESCRIPTION:https://indico.ijs.si/event/2231/
URL:https://web-f1.ijs.si/event/luighi-leal-correlating-0-ubetabeta-decays-and-flavor-observables-in-leptoquark-models/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240829T140000
DTEND;TZID=Europe/Ljubljana:20240829T150000
DTSTAMP:20260403T220228
CREATED:20240819T151141Z
LAST-MODIFIED:20240829T125758Z
UID:35415-1724940000-1724943600@web-f1.ijs.si
SUMMARY:Nudžeim Selimović: Topological Portal to the Dark Sector
DESCRIPTION:I will discuss a novel topological portal between quantum chromodynamics (QCD) and a dark QCD-like sector. Such a portal is present only for a unique coset structure after QCD confinement and it connects three QCD to two dark pions. When gauged\, it is the leading portal between the two sectors\, providing an elegant self-consistent scenario of light thermal inelastic dark matter. The inherent antisymmetrization due to a Wess–Zumino–Witten-like effective interaction leads to diminished annihilations at later times and suppressed direct detection. However\, novel collider signatures offer tremendous prospects for discovery at Belle II. The talk is based on https://arxiv.org/abs/2401.09528 with Joe Davighi and Admir Greljo.\nhttps://indico.ijs.si/event/2247/
URL:https://web-f1.ijs.si/event/nudzeim-selimovic-tba/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240902T140000
DTEND;TZID=Europe/Ljubljana:20240902T150000
DTSTAMP:20260403T220228
CREATED:20240819T122059Z
LAST-MODIFIED:20240902T125507Z
UID:35397-1725285600-1725289200@web-f1.ijs.si
SUMMARY:Jan Rozman\, "From Substrate Dissipation to Internal Dissipation Vertex Model Dynamics: Generating Sustained Flows"
DESCRIPTION:Speakers: Jan Rozman\nComplex tissue flows in epithelia are driven by intra- and inter-cellular processes that generate\, maintain\, and coordinate mechanical forces. There has been growing evidence that cell shape anisotropy\, manifested as nematic order\, plays an important role in this process.  Here we extend an active nematic vertex model by replacing substrate friction with internal viscous dissipation\, dominant in epithelia not supported by a substrate or the extracellular matrix\, which are found in many early-stage embryos.  When coupled to cell shape anisotropy\, the internal viscous dissipation allows for long-range velocity correlations and thus enables the spontaneous emergence of flows with a large degree of spatiotemporal organisation. We demonstrate sustained flow in epithelial sheets confined to a channel\, providing a link between the cell-level vertex model of tissue dynamics and continuum active nematics\, whose behaviour in a channel is theoretically understood and experimentally realisable. Our findings also show a simple mechanism that could account for collective cell migration correlated over distances large compared to the cell size\, as observed during morphogenesis.\nhttps://indico.ijs.si/event/2245/
URL:https://web-f1.ijs.si/event/jan-rozman-tba/
LOCATION:C/2-X – F1 čajnica (Jamova)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240903T140000
DTEND;TZID=Europe/Ljubljana:20240903T150000
DTSTAMP:20260403T220228
CREATED:20240819T122059Z
LAST-MODIFIED:20240903T125748Z
UID:35398-1725372000-1725375600@web-f1.ijs.si
SUMMARY:Somiealo Azote\, "Quantitative Predictions of biomechanical drivers of cell delamination in stratified epithelia (skin epidermis) using a dynamic 3D vertex model"
DESCRIPTION:Speakers: Somiealo Azote\nDuring embryonic development\, the skin epidermis gradually transitions from a single layer of stem cells to a stratified\, multi-layered tissue. This process involves the coordinated differentiation and upward movement of basal cells\, known as delamination. It is not clear what mechanisms control this differentiation and delamination\, allowing cells to move upward across the sharp basal-suprabasal boundary to regulate stratified tissue self-renewal and homeostasis. Although some delamination events are coupled to cell division\, we first focus on the simpler case where delamination occurs in the absence of cell division\, and develop a biomechanical model to investigate several experimentally driven hypotheses for what drives delamination in those cases: i) changes in the adhesion of basal cells to extra cellular matrix in the basement membrane\, ii) local fluidization of surrounding tissue due to fluctuations or nearby cell divisions\, or iii) cell autonomous changes to cell-cell adhesion and cortical tension. Experimental data from the developing mammalian epithelium in the Niessen and Wickström labs have identified specific changes to the transcriptome of cells committed to delamination. Many of these changes are associated with cell-cell and cell-substrate adhesion pathways. We incorporate them in the computational models as changes to the model parameters describing heterotypic and homotypic cell-cell interfacial tensions and adhesion to substrate. We make quantitative predictions for cell shape\, delamination probabilities\, and delamination rates that we compare directly to experiments\, in both control and perturbed systems\, to determine how different mechanisms are driving delamination.\nhttps://indico.ijs.si/event/2244/
URL:https://web-f1.ijs.si/event/somiealo-azote-quantitative-predictions-of-biomechanical-drivers-of-cell-delamination-in-stratified-epithelia-skin-epidermis-using-a-dynamic-3d-vertex-model/
LOCATION:C/2-X – F1 čajnica (Jamova)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240905T140000
DTEND;TZID=Europe/Ljubljana:20240905T150000
DTSTAMP:20260403T220228
CREATED:20240623T113943Z
LAST-MODIFIED:20240905T122617Z
UID:30278-1725544800-1725548400@web-f1.ijs.si
SUMMARY:Shoji\, Baratella: The Standard Model lifetime is slightly shorter
DESCRIPTION:We revisit the decay rate of the electroweak vacuum in the Standard Model with the full one-loop prefactor. We focus on the gauge degrees of freedom and derive the degeneracy factors appearing in the functional determinant using group theoretical arguments. Our treatment shows that the transverse modes were previously overcounted\, so we revise the calculation of that part of the prefactor. The new result modifies the gauge fields’ contribution by 7% and slightly decreases the previously predicted lifetime of the electroweak vacuum\, which remains much longer than the age of the universe. Our discussion of the transverse mode degeneracy applies to any calculation of functional determinants involving gauge fields in four dimensions.\nhttps://indico.ijs.si/event/2176/
URL:https://web-f1.ijs.si/event/shoji-baratella-the-standard-model-lifetime-is-slightly-shorter/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20240912T140000
DTEND;TZID=Europe/Ljubljana:20240912T150000
DTSTAMP:20260403T220228
CREATED:20240827T122432Z
LAST-MODIFIED:20240912T130001Z
UID:36147-1726149600-1726153200@web-f1.ijs.si
SUMMARY:Pietro Baratella: Journal Club on WZW terms without anomalies: generalised symmetries in chiral Lagrangians
DESCRIPTION:Journal Club on WZW terms without anomalies: generalised symmetries in chiral Lagrangians (arXiv:2407.20340)Abstract:We consider a 4d non-linear sigma model on the coset $(text{SU}(N)_L times text{SU}(N)_R times text{SU}(2))/(text{SU}(N)_{L+R}times text{U})cong text{SU}(N) times S^2$\, that features a topological Wess–Zumino–Witten (WZW) term whose curvature is $frac{n}{24pi^2}text{Tr}(g^{-1}dg)^3 wedge mathrm{Vol}_{S^2}$ where $g$ is the $text{SU}(N)$ pion field. This WZW term\, unlike its familiar cousin in QCD\, does not match any chiral anomaly\,so its microscopic origin is not obviously QCD-like. We find that generalised symmetries provide a key to unlocking a UV completion.The $S^2$ winding number bestows the theory with a 1-form symmetry\, and the WZW term intertwines this with the $text{SU}(N)^2$ flavour symmetry into a 2-group global symmetry. Like a ‘t Hooft anomaly\, the 2-group symmetry should match between UV and IR\, precluding QCD-like completions that otherwise give the right pion manifold. We instead construct a weakly-coupled UV completion that matches the 2-group symmetry\, in which an abelian gauge field connects the QCD baryon number current to the winding number current of a $mathbb{C}P^1$ model\, and explicitly show how the mixed WZW term arises upon flowing to the IR. The coefficient is fixed to be the number of QCD colours and\, strikingly\, this matching must be `tree-level exact’ to satisfy a quantization condition.We discuss generalisations\, and elucidate the more intricate generalised symmetry structure that arises upon gauging an anomaly-free subgroup of $text{SU}(N)_{L+R}$. This WZW term may even play a phenomenological role as a portal to a dark sector\, that determines the relic abundance of dark matter.\nhttps://indico.ijs.si/event/2259/
URL:https://web-f1.ijs.si/event/pietro-baratella-journal-club-on-wzw-terms-without-anomalies-generalised-symmetries-in-chiral-lagrangians/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
END:VEVENT
END:VCALENDAR