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PRODID:-//Department of Theoretical Physics - ECPv6.5.1.5//NONSGML v1.0//EN
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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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TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20250330T010000
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TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20251026T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20250703T110000
DTEND;TZID=Europe/Ljubljana:20250703T120000
DTSTAMP:20260422T203959
CREATED:20250701T123642Z
LAST-MODIFIED:20250703T093356Z
UID:65051-1751540400-1751544000@web-f1.ijs.si
SUMMARY:Martin Schmaltz: Hubble tension update
DESCRIPTION:This seminar will give an introduction to and status update of the Hubble tension\, the 6 sigma discrepancy between the two most precise methods for measuring the expansion rate of our Universe. The most promising resolutions of the tension employ “early” new physics to modify the sound horizon\, the standard ruler used in CMB and BAO based determinations of the expansion rate. A possibly related new piece of the puzzle might be the recent evidence for non-standard dark energy from the DESI experiment.\nhttps://indico.ijs.si/event/3014/
URL:https://web-f1.ijs.si/event/misha-gorshteyn-cabibbo-unitarity-anomaly-disappears/
LOCATION:https://www.youtube.com/@astroFMF/streams (F4 – FMF)
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BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20250707T110000
DTEND;TZID=Europe/Ljubljana:20250707T120000
DTSTAMP:20260422T203959
CREATED:20250528T102145Z
LAST-MODIFIED:20250707T093625Z
UID:61792-1751886000-1751889600@web-f1.ijs.si
SUMMARY:Raquel Molina: Quark mass dependence of hadron resonances
DESCRIPTION:https://indico.ijs.si/event/2976/
URL:https://web-f1.ijs.si/event/raquel-milona-quark-mass-dependence-of-hadron-resonances/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (F1 tea room)
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BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20250710T110000
DTEND;TZID=Europe/Ljubljana:20250710T120000
DTSTAMP:20260422T203959
CREATED:20250701T130658Z
LAST-MODIFIED:20250710T093831Z
UID:65058-1752145200-1752148800@web-f1.ijs.si
SUMMARY:David Kaplan: Shadow Matter
DESCRIPTION:I will review how one gets classical physics from quantum theories.  Then I will show that there are quantum states of the field theories of general relativity and electromagnetism that we typically ignore\, but have interesting phenomenological effects.  These states amount to loosening the constraint equations in GR and EM.   Doing so in GR sources non-dynamical parts of the metric which mimic a pressureless dust\, with some odd features\, and thus these effects may be the explanation as to why we think there is dark matter.  The constraint in EM is Gauss’ Law\, and turning it off mimics a charge density that does not respond to electric forces\, but follows geodesics.   I will briefly discuss the cosmological consequences of these new fields and potential studies.\nhttps://indico.ijs.si/event/3015/
URL:https://web-f1.ijs.si/event/david-kaplan/
LOCATION:https://www.youtube.com/@astroFMF/streams (F2 – FMF)
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BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20250710T140000
DTEND;TZID=Europe/Ljubljana:20250710T150000
DTSTAMP:20260422T203959
CREATED:20250612T102050Z
LAST-MODIFIED:20250710T123702Z
UID:63356-1752156000-1752159600@web-f1.ijs.si
SUMMARY:Fabio Staniscia (TBA)
DESCRIPTION:https://indico.ijs.si/event/3006/
URL:https://web-f1.ijs.si/event/fabio-staniscia-tba-4/
LOCATION:A/1-106 – Seminarska soba fizike (F5) (Jamova)
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BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20250725T160000
DTEND;TZID=Europe/Ljubljana:20250725T170000
DTSTAMP:20260422T203959
CREATED:20250722T081726Z
LAST-MODIFIED:20250725T135504Z
UID:67180-1753459200-1753462800@web-f1.ijs.si
SUMMARY:Lorenzo Ubaldi: Schwinger current in de Sitter
DESCRIPTION:We study classical background electric fields and the Schwinger effect in de Sitter space. We show that having a constant electric field in de Sitter requires the photon to have a tachyonic mass proportional to the Hubble scale. This has physical implications for the induced Schwinger current which affect its IR behaviour. To study this we recompute the Schwinger current in de Sitter space for charged fermions and minimally coupled scalars imposing a physically consistent renormalization condition. We find a finite and positive Schwinger current even in the massless limit. This is in contrast to previous calculations in the literature which found a negative IR divergence. We also obtain the first result of the Schwinger current for a non-minimally coupled scalar\, including for a conformally coupled scalar which we find has very similar behaviour to the fermion current. Our results may have physical implications for both magnetogenesis and inflationary dark matter production.\nhttps://indico.ijs.si/event/3030/
URL:https://web-f1.ijs.si/event/lorenzo-ubaldi-schwinger-current-in-de-sitter/
LOCATION:https://zoom.us/j/94950883072 (F1 – tea room)
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