Misha Gorshteyn: Cabibbo unitarity: anomaly (dis)appears

https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (A/1-106 - Seminarska soba fizike (F5))

Unitarity of the Cabibbo-Kobayashi-Maskawa (CKM) quark mixing matrix is one of the cornerstones of the Standard Model.  The unitarity constraint that involves the top-row matrix elements, $|V_{ud}|^2+|V_{us}|^2+|V_{ub}|^2=1$ is particularly  important because all elements are measured very precisely permitting a test … Read More

Tea Tušar (TBA)

A/1-106 - Seminarska soba fizike (F5) (Jamova)

https://indico.ijs.si/event/2978/

Martin Schmaltz: Hubble tension update

https://www.youtube.com/@astroFMF/streams (F4 - FMF)

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 … Read More

David Kaplan: Shadow Matter

https://www.youtube.com/@astroFMF/streams (F2 - FMF)

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 … Read More

Fabio Staniscia (TBA)

A/1-106 - Seminarska soba fizike (F5) (Jamova)

https://indico.ijs.si/event/3006/

Lorenzo Ubaldi: Schwinger current in de Sitter

https://zoom.us/j/94950883072 (F1 - tea room)

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 … Read More

Basudeb Dasgupta: Probing Dark Matter with Low-Mass Black Holes

A/1-106 - Seminarska soba fizike (F5)

Heavy non-annihilating dark matter captured by neutron stars can trigger collapse into low-mass black holes, producing subsolar-mass mergers detectable by gravitational wave observatories. These events probe dark matter-nucleon interactions at cross-sections below the neutrino floor and dark matter masses from … Read More

Ryan Plestid: TBA

A/1-106 - Seminarska soba fizike (F5)

https://indico.ijs.si/event/3028/