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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
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BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20241027T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20241010T140000
DTEND;TZID=Europe/Ljubljana:20241010T150000
DTSTAMP:20260423T161415
CREATED:20240927T070622Z
LAST-MODIFIED:20241010T125120Z
UID:39009-1728568800-1728572400@web-f1.ijs.si
SUMMARY:Domen Vaupotič\, "Programmable RNA Condensates"
DESCRIPTION:https://indico.ijs.si/event/2280/
URL:https://web-f1.ijs.si/event/domen-vaupotic-tba/
LOCATION:A/1-106 – Seminarska soba fizike (F5) (Jamova)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20241010T153000
DTEND;TZID=Europe/Ljubljana:20241010T163000
DTSTAMP:20260423T161415
CREATED:20240916T080814Z
LAST-MODIFIED:20241010T141046Z
UID:37890-1728574200-1728577800@web-f1.ijs.si
SUMMARY:Joshua Lockyer: Exploring near-conformal dark sector theories
DESCRIPTION:Dark-showers offer a compelling collider signature for Hidden Valley models featuring a confining dark sector. Our work extends the investigation of these models to near-conformal theories where the running coupling\, controlled by renormalization group equations (RGE)\, flows near to an infra-red fixed point. We establish a framework of two classes of RGE solutions which cover much of the parameter space of confining theories\, allowing us to present the first phenomenological results of such near-conformal dark sector theories.\nhttps://indico.ijs.si/event/2271/
URL:https://web-f1.ijs.si/event/joshua-lockyer/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (A/1-106 – Seminarska soba fizike (F5))
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20241016T110000
DTEND;TZID=Europe/Ljubljana:20241016T120000
DTSTAMP:20260423T161415
CREATED:20240924T072832Z
LAST-MODIFIED:20241016T091237Z
UID:38711-1729076400-1729080000@web-f1.ijs.si
SUMMARY:Benjamin Fuks: Signatures of toponium formation in LHC run 2 data
DESCRIPTION:We study reported deviations between observations and theoretical predictions associated with the production of a pair of di-leptonically decaying top quarks at the LHC\, and we examine the possibility that they reflect a signal of toponium formation. We investigate the production by gluon fusion of a colour-singlet spin-0 toponium bound state of a top and anti-top quark\, that then decays di-leptonically. We find strong correlations favouring the production of di-lepton systems featuring a small angular separation in azimuth and a small invariant mass. Although toponium production only contributes to 0.8% of the total top-quark pair-production cross section at the 13 TeV LHC\, there is a possibility that it can account for observed excesses in the narrow edges of phase space. We propose a method to discover toponium formation by `reconstructing’ both its top and anti-top quark constituents in the di-lepton channel.\nhttps://indico.ijs.si/event/2276/
URL:https://web-f1.ijs.si/event/benjamin-fuks-seeking-a-coherent-explanation-of-lhc-excesses-for-compressed-spectra/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (Jamova)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20241017T141500
DTEND;TZID=Europe/Ljubljana:20241017T151500
DTSTAMP:20260423T161415
CREATED:20241006T191857Z
LAST-MODIFIED:20241017T125158Z
UID:39971-1729174500-1729178100@web-f1.ijs.si
SUMMARY:Zala Korenjak\, "Smectic and soap bubble optofluidic lasers"
DESCRIPTION:We have demonstrated for the first time that soap bubbles can be used as lasers. Soap bubbles are simple\, yet very unique and marvelous objects. They are very interesting to the wide audience\, from children of all ages\, to researchers of a number of disciplines including mathematics\, physics\, chemistry and biology. To realize the soap bubble lasers\, we doped the bubbles with a fluorescent dye and pumped them with an external laser. The generated light circulated in the wall of the bubble\, which consequently worked as a laser cavity. Instead of soap\, we also made bubbles from surfactant-like molecules without any water present. Specifically\, smectic liquid crystals\, which molecules form well defined molecular layers\, were used for this purpose. Such bubbles had a completely uniform thickness with an integer number of molecular layers and most importantly they were extremely stable. The bubbles were attached to a tube or free floating in a container filled with carbon dioxide. The resulting whispering gallery mode lasing was observed in the spectrum of the emitted light as hundreds of regularly spaced sharp peaks. Shifts in the lasing wavelengths enabled the measurement of subtle size changes as small as 10 nm in a millimeter-sized bubble. This incredible precision allowed the bubbles to be used as one of the best pressure and electric field sensors developed till now. This unique physical system may in future allow the study of novel optical and mechanical phenomena in thin films.Video: https://youtu.be/oMXFM70Bmh4 \nhttps://indico.ijs.si/event/2342/
URL:https://web-f1.ijs.si/event/zala-korenjak-tba/
LOCATION:Seminar room of physics (106) (IJS)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20241017T153000
DTEND;TZID=Europe/Ljubljana:20241017T163000
DTSTAMP:20260423T161415
CREATED:20240819T130528Z
LAST-MODIFIED:20241017T142516Z
UID:35404-1729179000-1729182600@web-f1.ijs.si
SUMMARY:Maxim Mai: Lattice studies of resonances that decay to three-hadrons
DESCRIPTION:I will present the lattice results and underlying formalism on resonances omega and a1 that both strongly decay to three-hadron state pi-pi-pi. These are the first and only two resonances extracted from a three-hadron decay on lattice so far.   \nhttps://indico.ijs.si/event/2246/
URL:https://web-f1.ijs.si/event/maxi-mai-tba/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (A/1-106 – Seminarska soba fizike (F5))
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20241024T140000
DTEND;TZID=Europe/Ljubljana:20241024T150000
DTSTAMP:20260423T161415
CREATED:20241002T161227Z
LAST-MODIFIED:20241024T124059Z
UID:39565-1729778400-1729782000@web-f1.ijs.si
SUMMARY:Katarina Kokalj\, "Structural analysis of partially fluorinated liquid ethanol"
DESCRIPTION:Per- and polyfluoroalkyl substances (PFAS) are a group of synthetic fluorinated organic compounds that are indispensable in various applications\, from consumer products to scientific research\, due to their unique chemical and physical properties. Recently\, these compounds have been found to be hazardous to both the environment and human health\, and their remediation poses numerous challenges due to their stability and chemical inertness. Therefore\, structural analysis of PFAS compounds is crucial to address this issue. Molecular dynamics (MD) simulations are an important tool in this regard as they allow the study of atomic behavior over time. In this work\, we have focused on fluorinated alcohols. MD simulations were performed with the liquid 2\,2\,2-trifluoroethanol system (TFE) to determine how different force fields behave in describing the properties of fluorinated compounds. We have investigated six different force fields: TRAPPE\, GROMOS-UA\, GROMOS-AA\, CHARMM\, AMBER and OPLS. The suitability of these force fields for the prediction of structural and dynamic properties was evaluated by comparing the calculated results of simulation model systems with experimental X-ray scattering data\, conformational analyses from the literature and certain thermodynamic quantities such as density and molecular diffusion coefficient. It was found that the TRAPPE\, GROMOS-UA and GROMOS-AA force fields better describe the intermolecular correlations\, while CHARMM\, AMBER and OPLS are better suited to describe the intramolecular characteristics of TFE. The latter more accurately predicted the conformational forms of the molecules (gauche vs. trans)\, which we observed from the intramolecular spatial distribution functions and the average molecular end-to-end distances. On the other hand\, the position of the maximum of the theoretical scattering curves was in better agreement with the experimental peak with the TRAPPE\, GROMOS-UA and GROMOS-AA force fields.\nhttps://indico.ijs.si/event/2338/
URL:https://web-f1.ijs.si/event/katarina-kokalj-structural-analysis-of-partially-fluorinated-liquid-ethanol/
LOCATION:A/1-106 – Seminarska soba fizike (F5) (Jamova)
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